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<front>
<journal-meta>
<journal-id journal-id-type="publisher-id">LV</journal-id>
<journal-id journal-id-type="nlm-ta">Lijec Vjesn</journal-id>
<journal-title-group>
<journal-title>Lijecnicki Vjesnik</journal-title>
<abbrev-journal-title abbrev-type="pubmed">Lijec. Vjesn.</abbrev-journal-title>
</journal-title-group>
<issn pub-type="ppub">0024-3477</issn>
<issn pub-type="epub">1849-2177</issn>
<publisher><publisher-name>Croatian Medical Association</publisher-name></publisher>
</journal-meta>
<article-meta>
<article-id pub-id-type="publisher-id">LV-147-303</article-id>
<article-id pub-id-type="doi">10.26800/LV-147-7-8-8</article-id>
<article-categories><subj-group subj-group-type="heading"><subject>Original article</subject></subj-group>
</article-categories>
<title-group>
<article-title>Novosti u cijepljenju protiv pneumokoka</article-title>
<trans-title-group xml:lang="en">
<trans-title>News in vaccination against pneumococcal disease</trans-title>
</trans-title-group>
</title-group>
<contrib-group>
<contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-3770-9238</contrib-id><name><surname>Kusulja</surname><given-names>Marija</given-names></name><xref ref-type="aff" rid="aff1"><sup>1</sup></xref></contrib><contrib contrib-type="author"><name><surname>Miculini&#x0107;</surname><given-names>Neven</given-names></name><xref ref-type="aff" rid="aff2"><sup>2</sup></xref></contrib><contrib contrib-type="author"><name><surname>Samar&#x017E;ija</surname><given-names>Miroslav</given-names></name><xref ref-type="aff" rid="aff2"><sup>2</sup></xref><xref ref-type="aff" rid="aff3"><sup>3</sup></xref></contrib><contrib contrib-type="author"><name><surname>Santini</surname><given-names>Marija</given-names></name><xref ref-type="aff" rid="aff1"><sup>1</sup></xref><xref ref-type="aff" rid="aff3"><sup>3</sup></xref></contrib><contrib contrib-type="author"><name><surname>Stemberger Mari&#x0107;</surname><given-names>Lorna</given-names></name><xref ref-type="aff" rid="aff1"><sup>1</sup></xref><xref ref-type="aff" rid="aff3"><sup>3</sup></xref></contrib><contrib contrib-type="author"><name><surname>Vuki&#x0107; Dugac</surname><given-names>Andrea</given-names></name><xref ref-type="aff" rid="aff2"><sup>2</sup></xref><xref ref-type="aff" rid="aff3"><sup>3</sup></xref></contrib>
<aff id="aff1"><label>1</label>Klinika za infektivne bolesti &#x201E;Dr Fran Mihaljevi&#x0107;&#x201D;, <addr-line>Zagreb</addr-line></aff>
<aff id="aff2"><label>2</label>Klini&#x010D;ki bolni&#x010D;ki centar Zagreb, Klinika za plu&#x0107;ne bolesti &#x201E;Jordanovac&#x201D;, <addr-line>Zagreb</addr-line></aff>
<aff id="aff3"><label>3</label><institution>Medicinski fakultet Sveu&#x010D;ili&#x0161;ta u Zagrebu</institution>, <addr-line>Zagreb</addr-line></aff>
</contrib-group>
<author-notes>
<corresp id="cor1">Adresa za dopisivanje: Dr. sc. Marija Kusulja, dr. med., <ext-link ext-link-type="uri" xlink:href="https://orcid.org/0000-0002-3770-9238">https://orcid.org/0000-0002-3770-9238</ext-link>, Klinika za infektivne bolesti &#x201E;Dr. Fran Mihaljevi&#x0107;&#x201D;, hitni prijam, Mirogojska 8, 10000 Zagreb, e-po&#x0161;ta: <email xlink:href="mkusulja@kusulja.com">mkusulja@kusulja.com</email></corresp>
<fn fn-type="con">
<p content-type="fn-title">DOPRINOS AUTORA</p>
<p>K<sc>oncepcija</sc> <sc>ili</sc> <sc>nacrt</sc> <sc>rada</sc>: MK, MS, AVD</p>
<p>P<sc>rikupljanje</sc>, <sc>analiza</sc> <sc>i</sc> <sc>interpretacija</sc> <sc>podataka</sc>: MK, MS, AVD</p>
<p>P<sc>isanje</sc> <sc>prve</sc> <sc>verzije</sc> <sc>rada</sc>: MK, MS, AVD</p>
<p>K<sc>riti&#x010D;ka</sc> <sc>revizija</sc>: MK, NM, MS, MS, LSM, AVD</p>
</fn>
</author-notes>
<pub-date date-type="pub" publication-format="electronic"><month>09</month><year>2025</year></pub-date>
<pub-date date-type="pub" publication-format="print"><month>09</month><year>2025</year></pub-date>
<volume>147</volume>
<issue>7-8</issue>
<fpage>303</fpage>
<lpage>309</lpage>
<permissions>
<copyright-statement>Croatian Medical Association</copyright-statement>
<copyright-year>2025</copyright-year>
<copyright-holder>Croatian Medical Association</copyright-holder>
<license xlink:href="https://creativecommons.org/licenses/by-nc-nd/4.0/" specific-use="CC BY-NC-ND 4.0"><license-p>This is an open-access article distributed under the terms of the Creative Commons Attribution Non-Commercial No Derivatives (CC BY-NC-ND) 4.0 License.</license-p></license>
</permissions>
<abstract>
<title>SA&#x017D;ETAK</title>
<p><italic>Streptococcus pneumoniae</italic> va&#x017E;an je i &#x010D;est uzro&#x010D;nik te&#x0161;kih bolesti u svim, a osobito u krajnjim dobnim skupinama. Cijepljenje je najva&#x017E;nija mjera prevencije pneumokokne bolesti u svih osoba, a posebice u odre&#x0111;enih rizi&#x010D;nih skupina. U ovom su radu sa&#x017E;eti epidemiologija pneumokokne bolesti, dosada&#x0161;nje prakse cijepljenja pneumokoknim konjugiranim cjepivom (PCV) i pneumokoknim polisaharidnim cjepivom (PPSV) te informacije o novodostupnim konjugiranim cjepivima. U radu se predla&#x017E;e redoslijed i izbor cjepiva ovisno o dobi i pripadnosti odre&#x0111;enoj rizi&#x010D;noj skupini.</p>
</abstract>
<trans-abstract xml:lang="en">
<title>SUMMARY</title>
<p><italic>Streptococcus pneumoniae</italic> is an important and common cause of serious illnesses in all age groups, especially in the extremes of age. Vaccination is the most important measure in prevention of pneumococcal diseases in all people, particularly those within certain risk groups. This paper reviews epidemiology of pneumococcal disease, current practices in vaccination with pneumococcal conjugate vaccine (PCV) and pneumococcal polysaccharride vaccine (PPSV), and information on newly available 20-valent conjugated vaccine. The paper recommends the sequence and choice of vaccine based on age and belonging to a particular risk group.</p>
</trans-abstract>
<kwd-group kwd-group-type="author"><kwd>Deskriptori PNEUMOKOKNE BOLESTI &#x2013; epidemiologija, prevencija</kwd><kwd>PNEUMOKOK &#x2013; klasifikacija</kwd><kwd>PNEUMOKOKNA CJEPIVA &#x2013; na&#x010D;in primjene i doziranje, imunologija</kwd><kwd>KONJUGIRANA CJEPIVA &#x2013; na&#x010D;in primjene i doziranje, imunologija</kwd><kwd>U&#x010C;INKOVITOST CJEPIVA</kwd><kwd>SEROTIP</kwd><kwd>CIJEPLJENJE</kwd><kwd>RASPORED CIJEPLJENJA</kwd><kwd>DOBNI &#x010C;IMBENICI</kwd><kwd>HRVATSKA &#x2013; epidemiologija</kwd></kwd-group>
<kwd-group kwd-group-type="translator" xml:lang="en"><title>Descriptors </title><kwd>PNEUMOCOCCAL INFECTIONS &#x2013; epidemiology, prevention and control</kwd><kwd>STREPTOCOCCUS PNEUMONIAE &#x2013; classification</kwd><kwd>PNEUMOCOCCAL VACCINES &#x2013; administration and dosage, immunology</kwd><kwd>VACCINES, CONJUGATE &#x2013; administration and dosage, immunology</kwd><kwd>VACCINE EFFICACY</kwd><kwd>SEROGROUP</kwd><kwd>VACCINATION</kwd><kwd>IMMUNIZATION SCHEDULE</kwd><kwd>AGE FACTORS</kwd><kwd>CROATIA &#x2013; epidemiology</kwd></kwd-group>
</article-meta>
</front>
<body>
<p><italic>Streptococcus pneumoniae</italic> va&#x017E;an je uzro&#x010D;nik te&#x0161;kih bakterijskih bolesti u cijelom svijetu i u svih dobnih skupina. Invazivne pneumokokne bolesti (IPB) definirane su kao simptomatske bolesti uz mikrobiolo&#x0161;ki dokaz <italic>S. pneumoniae</italic> iz ina&#x010D;e sterilnog materijala te uklju&#x010D;uju pneumonije pra&#x0107;ene bakterijemijom, sepsu, meningitis, osteomijelitis i septi&#x010D;ki artritis. Va&#x017E;an dio globalnog tereta pneumokokne bolesti &#x010D;ine i nebakterijemi&#x010D;ne pneumonije, koje nisu slu&#x017E;beno definirane kao invazivne, a zatim i ostali oblici neinvazivnih pneumokoknih bolesti (otitis, sinusitis, bronhitis).</p>
<p>Pneumokok je naj&#x010D;e&#x0161;&#x0107;i uzro&#x010D;nik pneumonije u svijetu, uz procijenjenu godi&#x0161;nju globalnu incidenciju od 97,9 milijuna epizoda i 505.000 smrti. (<xref ref-type="bibr" rid="r1"><italic>1</italic></xref>) Svake godine pneumokok uzrokuje otprilike 326.000 slu&#x010D;ajeva bakterijskog meningitisa s posljedi&#x010D;nih 42.700 smrtnih slu&#x010D;ajeva. (<xref ref-type="bibr" rid="r1"><italic>1</italic></xref>) Pneumokokne infekcije &#x010D;ine javnozdravstveni problem zbog svoje u&#x010D;estalosti, te&#x017E;ine bolesti i mortaliteta, kao i optere&#x0107;enja zdravstvenog sustava. (<xref ref-type="bibr" rid="r2"><italic>2</italic></xref>, <xref ref-type="bibr" rid="r3"><italic>3</italic></xref>)</p>
<p>Slu&#x010D;ajevi IPB-a naj&#x010D;e&#x0161;&#x0107;i su u mla&#x0111;ih od dvije i starijih od 65 godina, a smrtnost je 10%, odnosno i vi&#x0161;e za starije dobne skupine i one s komorbiditetima. (<xref ref-type="bibr" rid="r4"><italic>4</italic></xref>)</p>
<p>Cijepljenje je najva&#x017E;nija mjera prevencije invazivnih, ali i ostalih oblika pneumokoknih bolesti. S obzirom na to da je od velja&#x010D;e 2022. u Europi odobreno 20-valentno konjugirano pneumokokno cjepivo (PCV), a od o&#x017E;ujka 2025. i 21-valentno konjugirano pneumokokno cjepivo, u ovom su radu sa&#x017E;eta dosada&#x0161;nja znanja i novosti o cijepljenju protiv pneumokoka, sa &#x0161;irim osvrtom na dva nova cjepiva.</p>
<sec sec-type="other1">
<title>Koji su rizi&#x010D;ni &#x010D;imbenici za invazivnu pneumokoknu bolest?</title>
<p>Rizi&#x010D;ni &#x010D;imbenici za invazivnu, te&#x0161;ku i/ili rekurentnu pneumokoknu bolest su dob mla&#x0111;a od pet godina (osobito kad je rije&#x010D; o djeci ro&#x0111;enoj kao nedono&#x0161;&#x010D;ad) i starija od 65 godina, kroni&#x010D;ne bolesti plu&#x0107;a, srca, bubrega ili jetre, neurolo&#x0161;ke bolesti, metaboli&#x010D;ke bolesti, psihijatrijske bolesti, Downov sindrom (<xref ref-type="bibr" rid="r5"><italic>5</italic></xref>), pu&#x0161;enje duhana, prekomjerna konzumacija alkohola, pretilost, boravak u ustanovi za dugotrajnu skrb, postoje&#x0107;i kohlearni implantati, likvoreja i trajna likvorska odvodnja, zanimanja izlo&#x017E;ena isparavanju metala (varioci) te prethodno preboljen IPB. (<xref ref-type="bibr" rid="r6"><italic>6</italic></xref>, <xref ref-type="bibr" rid="r7"><italic>7</italic></xref>)</p>
<p>Osobe s pove&#x0107;anim rizikom su i imunosuprimirani bolesnici; priro&#x0111;eno ili ste&#x010D;eno, uzrokovano bole&#x0161;&#x0107;u ili ijatrogeno (uklju&#x010D;uju&#x0107;i stani&#x010D;nu i humoralnu imunodeficijenciju, neutropeniju, deficijenciju komplementa), osobe s funkcionalnom ili anatomskom asplenijom, osobe s transplantiranim solidnim organima ili mati&#x010D;nim stanicama ko&#x0161;tane sr&#x017E;i, osobe s malignim bolestima, osobe s HIV-om bilo kojeg stadija, bolesnici na kemoterapiji, bolesnici na glukokortikoidnoj terapiji definiranoj kao ekvivalent minimalne doze 20 mg prednizolona u trajanju od barem mjesec dana. (<xref ref-type="bibr" rid="r8"><italic>8</italic></xref>)</p>
</sec>
<sec sec-type="other2">
<title>Kakva je epidemiologija pneumokokne bolesti u RH?</title>
<p>Prije uvo&#x0111;enja cjepiva protiv pneumokoka u obvezni kalendar cijepljenja djece u Republici Hrvatskoj IPB su dominantno bile uzrokovane serotipovima 14, 3, 19A, 23F, 6B, 9V i 7F. (<xref ref-type="bibr" rid="r9"><italic>9</italic></xref>) Nakon uvo&#x0111;enja obveznog cijepljenja djece 10-valentnim konjugiranim pneumokoknim cjepivom (PCV10) od 2019., u Hrvatskoj se u djece prati pad klicono&#x0161;tva serotipovima sadr&#x017E;anim u cjepivu PCV10. Istodobno se bilje&#x017E;i porast klicono&#x0161;tva serotipovima koji nisu sadr&#x017E;ani u cjepivu PCV10: 6C, 11A, 19A, 23A, kao i porast broja te&#x0161;kih pneumonija i IPB-a uzrokovanih serotipovima 3, 10A, 6A, 15C, 23A i 23B. (<xref ref-type="bibr" rid="r10"><italic>10</italic></xref>, <xref ref-type="bibr" rid="r11"><italic>11</italic></xref>) Podatci o IPB-u u odraslih su Hrvata manjkavi, no iz podataka za podru&#x010D;je Grada Zagreba od 2010. do 2022. naj&#x010D;e&#x0161;&#x0107;i serotipovi uzro&#x010D;nici IPB-a u odraslih bili su 3, 14 i 19A. (<xref ref-type="bibr" rid="r12"><italic>12</italic></xref>) Grafi&#x010D;ki prikaz distribucije serotipova uzro&#x010D;nika IPB-a u djece i odraslih u Hrvatskoj u razdoblju 2010. &#x2013; 2023. te njihova reprezentacija u dostupnim cjepivima prikazana je na <xref ref-type="fig" rid="f1">Figure 1</xref>.</p>
<fig id="f1" position="float" fig-type="figure"><label>Figure 1</label><caption><p>Serotypes contained within specific pneumococcal vaccines and distribution of serotypes in Croatia (<xref ref-type="bibr" rid="r11"><italic>11</italic></xref>, <xref ref-type="bibr" rid="r12"><italic>12</italic></xref>)</p></caption><graphic xlink:href="LV-147-303-f1"></graphic></fig>
<p>ECDC je do 2018. zabilje&#x017E;io serotipove 8, 3, 19A, 22F, 12F i 9N kao naj&#x010D;e&#x0161;&#x0107;e uzro&#x010D;nike IPB-a u Europi. Tada je zabilje&#x017E;eno i da je 75% slu&#x010D;ajeva IPB-a u djece mla&#x0111;e od pet godina uzrokovano serotipovima koji nisu obuhva&#x0107;eni tada dostupnim konjugiranim pneumokoknim cjepivima (PCV7 do PCV13). (<xref ref-type="bibr" rid="r13"><italic>13</italic></xref>) Primije&#x0107;eno je i da se nakon uvo&#x0111;enja cjepiva PCV u obvezni kalendar cijepljenja djece smanjila incidencija IPB-a u cijeloj populaciji (uzrokovanih onim serotipovima sadr&#x017E;anima u cjepivu koje se primjenjuje). Me&#x0111;utim, osim navedenoga pozitivnog u&#x010D;inka, zamije&#x0107;ena je i zamjena naj&#x010D;e&#x0161;&#x0107;ih serotipova u populaciji onima koji nisu sadr&#x017E;ani u ni&#x017E;e valentnim cjepivima, a zbog &#x010D;ega su se naknadno nacionalni programi cijepljenja mijenjali u korist primjene PCV-a vi&#x0161;e valencije. (<xref ref-type="bibr" rid="r13"><italic>13</italic></xref>, <xref ref-type="bibr" rid="r14"><italic>14</italic></xref>) Iako su djeca najva&#x017E;niji rezervoar pneumokoknih infekcija kao nazofaringealni klicono&#x0161;e, te&#x017E;i oblici pneumokoknih bolesti u djece uzrokovani su serotipovima ni&#x017E;eg broja (i manjim brojem serotipova op&#x0107;enito nego &#x0161;to je to slu&#x010D;aj u odraslih bolesnika). (<xref ref-type="bibr" rid="r15"><italic>15</italic></xref>) U Njema&#x010D;koj je zabilje&#x017E;eno da cjepivo PCV13 pokriva 35%, PCV20 pribli&#x017E;no 60%, a 23-valentno polisaharidno pneumokokno cjepivo (PPSV23) pokriva 72% serotipova koji uzrokuju IPB u osoba u dobi &#x2265;60 godina. Kao dominantan se isti&#x010D;e serotip 3, protiv kojeg adekvatnu za&#x0161;titu ne pru&#x017E;a cijepljenje cjepivom PCV10, PCV13, ni cjepivom PPSV23. (<xref ref-type="bibr" rid="r6"><italic>6</italic></xref>)</p>
</sec>
<sec sec-type="other3">
<title>Dosada&#x0161;nje prakse cijepljenja protiv pneumokoka</title>
<p>Danas su u upotrebi konjugirana pneumokokna cjepiva razli&#x010D;itih valencija (PCV10, PCV13, PCV15, PCV20, PCV21) i 23-valentno polisaharidno cjepivo (PPSV23). Antigeni koje sadr&#x017E;ava svako dostupno cjepivo, odnosno serotipovi pneumokoka protiv kojih pru&#x017E;aju za&#x0161;titu prikazani su na <xref ref-type="fig" rid="f1">Figure 1</xref>. Dosada&#x0161;nje preporuke odnosile su se na cijepljenje djece konjugiranim cjepivom, na cijepljenje rizi&#x010D;nih odraslih osoba polisaharidnim cjepivom ili pak kombinacijom konjugiranog i polisaharidnog cjepiva.</p>
<p>Konjugirana pneumokokna cjepiva imaju nekoliko prednosti. Imaju ve&#x0107;u imunogenost u usporedbi s polisaharidnim cjepivom (u&#x010D;inkovitije prekap&#x010D;anje razreda protutijela, aktivacija memorijskih B-limfocita), zna&#x010D;ajnije inhibiraju kolonizaciju nazofarinksa te se mogu primjenjivati i u dojen&#x010D;adi. Njihov je nedostatak u odnosu na PPSV to &#x0161;to imaju manju serotipsku &#x0161;irinu te iako smanjuju incidenciju pneumokoknih bolesti sadr&#x017E;anim serotipovima, istodobno poti&#x010D;u izmjenu naj&#x010D;e&#x0161;&#x0107;ih serotipova u populaciji. Prednost je primjene konjugiranih cjepiva vi&#x0161;e valencije u &#x0161;iroj pokrivenosti serotipova (uklju&#x010D;uju&#x0107;i bolju imunogenost protiv serotipa 3 u cjepivima PCV15 i onima vi&#x0161;e valencije). Tako se poku&#x0161;ava nadvladati u&#x010D;inak serotipske zamjene uzrokovane primjenom ni&#x017E;e valentnih cjepiva te se bolje &#x0161;tite odrasli bolesnici u kojih je IPB uzrokovan ve&#x0107;im rasponom serotipova. Zato velik broj razvijenih dr&#x017E;ava svijeta preporu&#x010D;uje odrasle bolesnike cijepiti cjepivom PCV13 ili PCV15, a prema novijim podatcima prvenstveno cjepivima PCV20 ili PCV21. Za&#x0161;titnost cjepiva PCV13 protiv IPB-ova uzrokovanih serotipovima sadr&#x017E;anima u cjepivu je 47 &#x2013; 68% (uz najni&#x017E;u za&#x0161;titnost za serotip 3). (<xref ref-type="bibr" rid="r6"><italic>6</italic></xref>) Trajanje za&#x0161;tite nakon primjene konjugiranih pneumokoknih cjepiva nije poznato, a odrasle se preporu&#x010D;uje cijepiti jednokratno, jednom dozom. Prema dostupnim podatcima u Hrvatskoj PCV13 sadr&#x017E;ava antigene protiv 77,3% serotipova uzro&#x010D;nika IPB-a u odraslih, dok je postotak za PCV15 83,2%, za PCV20 89,3%, za PCV21 53,7%, a za PPSV23 93,1%. (<xref ref-type="bibr" rid="r12"><italic>12</italic></xref>)</p>
<p>Polisaharidno cjepivo (PPSV23) ima najve&#x0107;u prednost u &#x0161;irini serotipova od kojih pru&#x017E;a za&#x0161;titu. Zbog toga je bilo preporu&#x010D;eno kao cjepivo prvog izbora u odraslih bolesnika (starijih od 65 godina i onih s rizi&#x010D;nim &#x010D;imbenicima). Me&#x0111;utim, nedostatak je cjepiva PPSV23 to &#x0161;to je manje imunogeno, odnosno stvara protutijela neovisna o T-pomo&#x0107;ni&#x010D;kim limfocitima te kra&#x0107;e &#x017E;ivu&#x0107;e memorijske B-limfocite koji proizvode samo IgM protutijela, a ne inducira dovoljan odgovor u djece mla&#x0111;e od dvije godine te u imunokompromitiranih odraslih. Ono tako&#x0111;er &#x0161;titi uglavnom od IPB-a, ali ne i od ostalih te&#x0161;kih bolesti (npr. nebakterijemi&#x010D;ne pneumonije). Za&#x0161;titnost cjepiva PPSV23 protiv IPB-a uzrokovanog serotipovima 23 sadr&#x017E;anima u ovom cjepivu je 42 &#x2013; 64% (<xref ref-type="bibr" rid="r6"><italic>6</italic></xref>), uz pad na 45% nakon pet i vi&#x0161;e godina u bolesnika starijih od 60 godina. Vi&#x0161;e studija ukazuje na pad za&#x0161;titnosti cjepiva PPSV23 pet i vi&#x0161;e godina nakon primjene. (<xref ref-type="bibr" rid="r6"><italic>6</italic></xref>)</p>
<p>U ve&#x0107;ini razvijenih zemalja preporu&#x010D;uje se da se starije od 60, 65 ili 70 godina cijepi samo cjepivom PPSV23, ali da se one s komorbiditetima koji pove&#x0107;avaju rizik od pneumokoknih bolesti cijepi najprije konjugiranim, a potom polisaharidnim cjepivom. Tako se posti&#x017E;e ve&#x0107;a imunogenost za one serotipove sadr&#x017E;ane u konjugiranom cjepivu, ali i &#x0161;ira za&#x0161;tita zahvaljuju&#x0107;i polisaharidnom cjepivu koje &#x0161;titi od najve&#x0107;eg broja serotipova.</p>
<p>Smatralo se da bi konjugirana cjepiva vi&#x0161;e valencije (PCV20 i PCV21) mogla premostiti navedene nedostatke dosada&#x0161;njih ni&#x017E;e valentnih konjugiranih cjepiva i 23-valentnoga polisaharidnog cjepiva. (<xref ref-type="bibr" rid="r14"><italic>14</italic></xref>) Od 2022., kada su u Europskoj uniji odobrena dva nova konjugirana cjepiva: PCV15 i PCV20, velik je broj europskih, ali i zemalja svijeta, uveo PCV20 kao cjepivo prvog izbora za rizi&#x010D;ne skupine (starije od 60, 65 ili 70 godina, ovisno o zemlji, te one s rizikom od IPB-a). (<xref ref-type="bibr" rid="r16"><italic>16</italic></xref>&#x2013;<xref ref-type="bibr" rid="r24"><italic>24</italic></xref>) Kao alternativa mogu&#x0107;e je cijepljenje cjepivom PCV15, a potom docjepa cjepivom PPSV23. Ostaje otvoreno pitanje treba li PPSV23 slijediti PCV20, o &#x010D;emu dr&#x017E;ave imaju razli&#x010D;it stav. (<xref ref-type="bibr" rid="r7"><italic>7</italic></xref>) Najrecentnije, od o&#x017E;ujka 2025., u Europi je za odrasle odobreno i najnovije konjugirano pneumokokno cjepivo, PCV21 (<xref ref-type="bibr" rid="r25"><italic>25</italic></xref>), a ono je dosad u preporuke u&#x0161;lo tek u SAD-u, gdje je ne&#x0161;to ranije odobreno. (<xref ref-type="bibr" rid="r26"><italic>26</italic></xref>)</p>
<p>Hrvatski zavod za javno zdravstvo trenuta&#x010D;no preporu&#x010D;uje, a Hrvatski zavod za zdravstveno osiguranje financira polisaharidno pneumokokno cjepivo za pacijente koji su stariji od dvije godine te imaju jedan od &#x010D;imbenika rizika: aspleniju, imunokompromitiranost, kroni&#x010D;nu bolest srca, plu&#x0107;a, bubrega, jetre, &#x0161;e&#x0107;ernu bolest, alkoholizam, kohlearni implantat i stanja koja dovode do likvoreje. Konjugirano pneumokokno cjepivo preporu&#x010D;eno je osobama s asplenijom, imunokompromitiranima, onima s kohlearnim implantatima i stanjima koja dovode do likvoreje. HZJZ u svojim preporukama trenuta&#x010D;no ne predvi&#x0111;a cijepljenje osoba starije &#x017E;ivotne dobi koje nemaju drugi rizi&#x010D;ni &#x010D;imbenik za IPB. (<xref ref-type="bibr" rid="r27"><italic>27</italic></xref>)</p>
</sec>
<sec sec-type="other4">
<title>20-valentno konjugirano pneumokokno cjepivo &#x2013; PCV20</title>
<sec>
<title>Op&#x0107;enito o cjepivu</title>
<p>PCV20 je novo konjugirano pneumokokno cjepivo, odobreno za kori&#x0161;tenje u Europskoj uniji od 2022. godine. Ono sadr&#x017E;ava antigene dvadeset serotipova pneumokoka, 8, 10A, 11A, 12F, 15B, 22F i 33F uz one ve&#x0107; sadr&#x017E;ane u prethodno dostupnom PCV13.</p>
</sec>
<sec>
<title>Imunogenost i sigurnost</title>
<p>Imunogenost i sigurnost cjepiva PCV20 prikazani su u metaanalizi provedenoj tijekom pripreme preporuka njema&#x010D;ke stalne komisije za cijepljenje (<xref ref-type="bibr" rid="r6"><italic>6</italic></xref>), koja je uspore&#x0111;ena s PCV13 i PPSV23.</p>
<p>Zbog nedostatka klini&#x010D;kih studija i rezultata o realnoj u&#x010D;inkovitosti cjepiva PCV20, imunogenost cjepiva PCV20 uspore&#x0111;ena je posredno te samo u imunokompetentnih osoba. Pokazala se neinferiornost PCV20 za trinaest serotipova sadr&#x017E;anih u PCV13 te &#x0161;est od sedam preostalih serotipova sadr&#x017E;anih u PPSV23. U jednoj je studiji pokazana inferiornost PCV20 u usporedbi s PCV13 za serotipove 1, 5 i 19F, u vi&#x0161;e je studija PCV20 inferioran u odnosu na PPSV23 za serotip 8, ali istodobno superioran u odnosu na PPSV23 za serotipove 10A, 11A, 12F, 15B, 22F i 33F. Zaklju&#x010D;eno je da PCV20 vjerojatno pru&#x017E;a bolju za&#x0161;titu od pneumokoknih bolesti jer &#x0161;titi od ve&#x0107;eg broja serotipova u usporedbi s PCV13 te uzrokuje sna&#x017E;niju aktivaciju B-limfocita u usporedbi s PPSV23.</p>
<p>Pojavnost ne&#x017E;eljenih pojava nakon cijepljenja PCV20 u usporedbi s PCV13, PPSV23 ili placebom nije bila statisti&#x010D;ki zna&#x010D;ajno razli&#x010D;ita za bol na mjestu primjene cjepiva, febrilitet, mijalgije i te&#x0161;ke ne&#x017E;eljene pojave. Cjepivo PCV20 je u usporedbi s ostalima bilo povezano s manjom incidencijom glavobolje u dobnoj skupini starijoj od 60 godina.</p>
</sec>
<sec>
<title>Pozologija</title>
<p>Cijepljenje PCV20 u odraslih osoba vr&#x0161;i se jednokratno, &#x0161;to prije nakon &#x0161;to se evidentira postojanje nekog od &#x010D;imbenika rizika za te&#x0161;ku pneumokoknu bolest (odlomak 2).</p>
<p>Kod bolesnika za koje se planira imunosupresija preporu&#x010D;uje se PCV20 primijeniti u razdoblju od &#x010D;etiri do &#x0161;est tjedana (a najkasnije dva tjedna) prije splenektomije, najmanje dva tjedna prije po&#x010D;etka kemoterapije ili primjene biolo&#x0161;kog lijeka. Zbog o&#x010D;ekivane bolje imunogenosti savjetuje se pri&#x010D;ekati s cijepljenjem dva tjedna nakon splenektomije, tri mjeseca nakon kemoterapije i &#x0161;est mjeseci nakon biolo&#x0161;kih lijekova. (<xref ref-type="bibr" rid="r28"><italic>28</italic></xref>) U osoba kojima su transplantirane mati&#x010D;ne hematopoetske stanice treba ponovno provesti kompletno cijepljenje protiv pneumokoka. One trebaju zapo&#x010D;eti cijepljenje u razdoblju od tri do &#x0161;est mjeseci nakon transplantacije, a cijepljenje se provodi s &#x010D;etiri doze cjepiva PCV 20: prve tri doze u razmacima od &#x010D;etiri tjedna, a posljednja doza najmanje &#x0161;est mjeseci nakon tre&#x0107;e doze i najmanje dvanaest mjeseci nakon transplantacije. (<xref ref-type="bibr" rid="r16"><italic>16</italic></xref>)</p>
<p>Za osobe koje primaju imunosupresivnu terapiju, uklju&#x010D;uju&#x0107;i humane imune medijatore (interleukini, &#x010D;imbenici stimulacije kolonija leukocita, imunomodulatori i lijekovi poput inhibitora TNF-&#x03B1; i anti-B-stani&#x010D;nih lijekova) preporu&#x010D;uje se odgoditi primjenu ne&#x017E;ivih cjepiva barem &#x0161;est mjeseci od primjene navedene terapije. Najbolje bi bilo osobe koji su kandidati za prethodno navedenu terapiju cijepiti prije zapo&#x010D;injanja navedenog lije&#x010D;enja.</p>
<p>S obzirom na trenuta&#x010D;no dostupne dokaze, ne mo&#x017E;e se nedvojbeno utvrditi treba li cijepljenje s PCV20 nadopuniti naknadnim cijepljenjem s PPSV23. Ve&#x0107;ina zemalja u svojim preporukama za cijepljenje rizi&#x010D;nih skupina protiv pneumokoka savjetuje cijepljenje samo PCV20, no Austrija savjetuje zatim i PPSV23 za sve (<xref ref-type="bibr" rid="r29"><italic>29</italic></xref>), a Luksemburg za najrizi&#x010D;nije skupine (<xref ref-type="bibr" rid="r30"><italic>30</italic></xref>). U slu&#x010D;aju odluke za primjenu PPSV23 nakon PCV20, potreban je vremenski razmak od godine dana u imunokompetentnih osoba s &#x010D;imbenikom rizika za te&#x0161;ku pneumokoknu bolest. U imunokompromitiranih bolesnika i onih s likvorejom PPSV23 mo&#x017E;e se primijeniti ve&#x0107; osam tjedana nakon PCV20.</p>
</sec>
<sec>
<title>&#x0160;to s bolesnicima koji su ve&#x0107; cijepljeni?</title>
<p>Ne postoje jasni podatci o najboljem vremenskom intervalu primjene PCV20 nakon ve&#x0107; primljenog cjepiva PPSV23. S obzirom na poznat zna&#x010D;ajan pad za&#x0161;titnosti PPSV23 pet godina nakon cijepljenja, u ve&#x0107;ini zemalja postoji konsenzus o potrebnom razdoblju od &#x0161;est godina proteklih od prethodno primljenog PPSV23, a prije planirane primjene PCV20 u odraslih osoba s &#x010D;imbenicima rizika. To je razdoblje kra&#x0107;e za zna&#x010D;ajno imunosuprimirane osobe, u kojih je dovoljan razmak od godine dana izme&#x0111;u primljenog PPSV23 i planiranog PCV20.</p>
<p>Ista preporuka vremenskog odmaka odnosi se i na osobe koje su prethodno sekvencijalno cijepljene s PCV13, a potom PPSV23.</p>
<p>U osoba koje su primile PCV13 ili drugo konjugirano pneumokokno cjepivo ni&#x017E;e valencije, a nisu jo&#x0161; primile PPSV23, preporu&#x010D;uje se cijepljenje s PCV20 u razmaku od najmanje godine dana. (<xref ref-type="bibr" rid="r6"><italic>6</italic></xref>)</p>
</sec>
<sec>
<title>Docjepljivanja</title>
<p>Trenuta&#x010D;no nema podataka o potrebi docjepljivanja cjepivom PCV20.</p>
</sec>
</sec>
<sec sec-type="other5">
<title>21-valentno konjugirano pneumokokno cjepivo &#x2013; PCV21</title>
<p>Od o&#x017E;ujka 2025. u Europi je za odrasle odobreno novo konjugirano pneumokokno cjepivo, PCV21. (<xref ref-type="bibr" rid="r25"><italic>25</italic></xref>) Ono ne sadr&#x017E;ava deset serotipova sadr&#x017E;anih u PCV20, ali &#x0161;titi od jedanaest drugih serotipova koji nisu sadr&#x017E;ani ni u PCV15 ni u PCV20 &#x2013; kako je prikazano na <xref ref-type="fig" rid="f1">Figure 1</xref>. Takva promjena antigena sadr&#x017E;anih u cjepivu motivirana je promjenom distribucije serotipova s godinama kori&#x0161;tenja prethodno dostupnih pneumokoknih cjepiva.</p>
<p>S obzirom na nedavno odobrenje u Europi, PCV21 jo&#x0161; nije dio slu&#x017E;benih preporuka europskih zemalja. Nakon ranijeg odobrenja kori&#x0161;tenja PCV21 u SAD-u u lipnju 2024., ameri&#x010D;ka Savjetodavna komisija za imunizacijsku praksu (ACIP) od srpnja 2024. preporu&#x010D;uje PCV21 odraslima kojima je dosad bilo preporu&#x010D;eno cijepljenje s PCV20, a nisu se jo&#x0161; njime cijepili &#x2013; jednako kao PCV20 &#x2013; jednokratno, bez potrebe docjepljivanja s PPSV23. (<xref ref-type="bibr" rid="r26"><italic>26</italic></xref>) Ta se preporuka temelji na tome &#x0161;to PCV21 &#x0161;titi od 80% serotipova koji su uzrokovali IPB u odraslih s rizi&#x010D;nim &#x010D;imbenicima od 2018. do 2022., a od toga 20 &#x2013; 30% &#x010D;ine serotipovi koje sadr&#x017E;ava samo PCV21 i nijedno drugo pneumokokno cjepivo.</p>
<p>U studijama se PCV21 pokazao imunogeno&#x0161;&#x0107;u neinferioran PCV15, PCV20 i PPSV23 za serotipove koje dijele navedena cjepiva, a dodatno &#x0161;titi protiv osam novih serotipova, od &#x010D;ega jedino imunogeni&#x010D;nost za serotip 15C nije statisti&#x010D;ki zna&#x010D;ajna. (<xref ref-type="bibr" rid="r31"><italic>31</italic></xref>, <xref ref-type="bibr" rid="r32"><italic>32</italic></xref>)</p>
</sec>
<sec sec-type="other6">
<title>Zaklju&#x010D;ak &#x2013; preporuke za cijepljenje</title>
<p>S obzirom na dosad dostupna cjepiva i poznatu distribuciju serotipova u Hrvatskoj (<xref ref-type="bibr" rid="r11"><italic>11</italic></xref>, <xref ref-type="bibr" rid="r12"><italic>12</italic></xref>), preporu&#x010D;ujemo cijepiti osobe koje pripadaju rizi&#x010D;nim skupinama (vidi odlomak 2) jednom dozom cjepiva PCV20. To uklju&#x010D;uje osobe dobi od 60 i vi&#x0161;e godina, one s komorbiditetima, zanimanjima i socijalnim okolnostima koje ih &#x010D;ine visokorizi&#x010D;nima za te&#x0161;ke pneumokokne bolesti. Ako je cjepivo PCV20 nedostupno, preporu&#x010D;uje se primjena konjugiranog cjepiva najve&#x0107;e dostupne valencije (PCV 15 ili PCV 13) te zatim obvezno cijepljenje s PPSV23 nakon godine dana (iznimno osam tjedana u visokorizi&#x010D;nih skupina).</p>
<p>Posebno, u najrizi&#x010D;nijih skupina (imunokompromitirani, osobe s kohlearnim implantatom, oni s likvorejom) nakon jednokratne primjene konjugiranog cjepiva mo&#x017E;e se nakon osam ili vi&#x0161;e tjedana primijeniti i PPSV23, uz docjepljivanje cjepivom PPSV23 svakih &#x0161;est godina.</p>
<p>Navedene preporuke sa&#x017E;ete su u <xref ref-type="table" rid="t1">Table 1</xref>.</p>
<table-wrap id="t1" position="float">
<label>Table 1</label><caption><title>Recommendation for vaccination based on risk group and previous vaccination status</title>
</caption>
<table frame="hsides" rules="groups">
<col width="24.27%"/>
<col width="18.94%"/>
<col width="18.93%"/>
<col width="18.93%"/>
<col width="18.93%"/>
<thead>
<tr>
<th valign="middle" align="left" scope="col" style="border-left: solid 0.75pt; border-top: solid 0.75pt; border-right: solid 0.50pt; border-bottom: solid 0.50pt">Rizi&#x010D;na skupina<break/>/ Risk group</th>
<th valign="middle" align="left" scope="col" style="border-left: solid 0.50pt; border-top: solid 0.75pt; border-right: solid 0.50pt; border-bottom: solid 0.50pt">Prethodno necijepljeni<break/>/ Pneumococcal vaccine naive</th>
<th valign="middle" align="left" scope="col" style="border-left: solid 0.50pt; border-top: solid 0.75pt; border-right: solid 0.50pt; border-bottom: solid 0.50pt">Prethodno cijepljeni samo s PPSV23<break/>/ Previously received PPSV23</th>
<th valign="middle" align="left" scope="col" style="border-left: solid 0.50pt; border-top: solid 0.75pt; border-right: solid 0.50pt; border-bottom: solid 0.50pt">Prethodno cijepljeni s PCV13<break/>/ Previously received PCV13</th>
<th valign="middle" align="left" scope="col" style="border-left: solid 0.50pt; border-top: solid 0.75pt; border-right: solid 0.75pt; border-bottom: solid 0.50pt">Prethodno cijepljeni s PCV13 + PPSV23<break/>/ Previously received PCV13 + PPSV23</th>
</tr>
</thead>
<tbody>
<tr>
<td valign="top" align="left" style="border-left: solid 0.75pt; border-top: solid 0.50pt; border-right: solid 0.50pt; border-bottom: solid 0.50pt" scope="row">&#x2265;60 godina<break/>/ &#x2265;60 years old</td>
<td valign="top" align="left" style="border-left: solid 0.50pt; border-top: solid 0.50pt; border-right: solid 0.50pt; border-bottom: solid 0.50pt">PCV20 jednokratno<break/>/ PCV20 single dose</td>
<td valign="top" align="left" style="border-left: solid 0.50pt; border-top: solid 0.50pt; border-right: solid 0.50pt; border-bottom: solid 0.50pt">PCV20 jednokratno nakon &#x0161;est godina<break/>/ PCV20 single dose six years following PPSV23</td>
<td valign="top" align="left" style="border-left: solid 0.50pt; border-top: solid 0.50pt; border-right: solid 0.50pt; border-bottom: solid 0.50pt">PCV20 jednokratno nakon godine dana<break/>/ PCV20 single dose one year following PCV13</td>
<td valign="top" align="left" style="border-left: solid 0.50pt; border-top: solid 0.50pt; border-right: solid 0.75pt; border-bottom: solid 0.50pt">PCV20 jednokratno nakon &#x0161;est godina<break/>/ PCV20 single dose six years following PPSV23</td>
</tr>
<tr>
<td valign="top" align="left" style="border-left: solid 0.75pt; border-top: solid 0.50pt; border-right: solid 0.50pt; border-bottom: solid 0.50pt" scope="row">Kroni&#x010D;ne bolesti, socijalna i profesionalna izlo&#x017E;enost<break/>/ Chronic conditions, social and professional exposure</td>
<td valign="top" align="left" style="border-left: solid 0.50pt; border-top: solid 0.50pt; border-right: solid 0.50pt; border-bottom: solid 0.50pt">PCV20 jednokratno<break/>/ PCV20 single dose</td>
<td valign="top" align="left" style="border-left: solid 0.50pt; border-top: solid 0.50pt; border-right: solid 0.50pt; border-bottom: solid 0.50pt">PCV20 jednokratno nakon &#x0161;est godina<break/>/ PCV20 single dose six years following PPSV23</td>
<td valign="top" align="left" style="border-left: solid 0.50pt; border-top: solid 0.50pt; border-right: solid 0.50pt; border-bottom: solid 0.50pt">PCV20 jednokratno nakon godine dana<break/>/ PCV20 single dose one year following PCV13</td>
<td valign="top" align="left" style="border-left: solid 0.50pt; border-top: solid 0.50pt; border-right: solid 0.75pt; border-bottom: solid 0.50pt">PCV20 jednokratno nakon &#x0161;est godina<break/>/ PCV20 single dose six years following PPSV23</td>
</tr>
<tr>
<td valign="top" align="left" style="border-left: solid 0.75pt; border-top: solid 0.50pt; border-right: solid 0.50pt; border-bottom: solid 0.75pt" scope="row">Imunokompromitirani, osobe s kohlearnim implantatom i izlo&#x017E;enosti cerebrospinalnog likvora<break/>/ Immunocompromised, persons with cochlear implants, or cerebrospinal fluid leak</td>
<td valign="top" align="left" style="border-left: solid 0.50pt; border-top: solid 0.50pt; border-right: solid 0.50pt; border-bottom: solid 0.75pt">PCV20 jednokratno &#x00B1;PPSV23 nakon osam ili vi&#x0161;e tjedana uz docjepljivanje PPSV23 svakih &#x0161;est godina<break/>/ PCV20 single dose &#x00B1;PPSV23 eight or more weeks following PCV20, repeat PPSV23 every six years</td>
<td valign="top" align="left" style="border-left: solid 0.50pt; border-top: solid 0.50pt; border-right: solid 0.50pt; border-bottom: solid 0.75pt">PCV20 jednokratno nakon godine dana &#x00B1; docjepljivanje PPSV23 svakih &#x0161;est godina<break/>/ PCV20 single dose one year following PPSV23 &#x00B1; repeat PPSV23 every six years</td>
<td valign="top" align="left" style="border-left: solid 0.50pt; border-top: solid 0.50pt; border-right: solid 0.50pt; border-bottom: solid 0.75pt">PCV20 jednokratno nakon godine dana &#x00B1; PPSV23 nakon osam ili vi&#x0161;e tjedana uz docjepljivanje svakih &#x0161;est godina<break/>/ PCV20 single dose one year following PCV13 &#x00B1; PPSV23 eight or more weeks later, repeat PPSV23 every six years</td>
<td valign="top" align="left" style="border-left: solid 0.50pt; border-top: solid 0.50pt; border-right: solid 0.75pt; border-bottom: solid 0.75pt">PCV20 jednokratno nakon &#x0161;est godina &#x00B1; docjepljivanje PPSV23 svakih &#x0161;est godina<break/>/ PCV20 single dose six years following PPSV23 &#x00B1; repeat PPSV23 every six years</td>
</tr>
</tbody>
</table><table-wrap-foot>
<p>Znak &#x00B1; odnosi se na nedostatak dokaza za potrebu cijepljenja s PPSV23 nakon primijenjenog PCV20, ali i &#x010D;injenice da se kombinacijom tih dvaju cjepiva pru&#x017E;a za&#x0161;tita od &#x0161;ireg raspona serotipova pneumokoka. Kako je navedeno u tekstu, ako nema cjepiva PCV20, cijepljenje s PCV15 ili PCV13 obvezno treba slijediti PPSV23. / &#x00B1; sign refers to lack of evidence for recommendation of vaccination with PPSV23 following PCV20, but taking into account that receiving both vaccines gives a broader protection in regard to pneumococcal serotype groups. As previously mentioned in the text, if PCV20 is unavailable, PCV15 or PCV13 should always be followed up with PPSV23.</p>
</table-wrap-foot></table-wrap>
</sec>
<sec sec-type="other7">
<title>Istodobno cijepljenje protiv vi&#x0161;e bolesti</title>
<p>Istodobno cijepljenje s PCV20 i inaktiviranim cjepivom protiv gripe pokazalo je neizmijenjenu imunogenost obaju cjepiva, uz ne&#x0161;to vi&#x0161;u incidenciju reakcija na cjepivo unutar sedam dana od primjene, ali bez promjene incidencije ne&#x017E;eljenih pojava trideset dana nakon cijepljenja. (<xref ref-type="bibr" rid="r33"><italic>33</italic></xref>)</p>
<p>Istodobno cijepljenje s PCV20 i mRNA cjepivom protiv SARS-CoV-2 pokazalo je odr&#x017E;anu imunogenost obaju cjepiva te bezna&#x010D;ajne razlike u u&#x010D;estalosti ne&#x017E;eljenih pojava u sljede&#x0107;ih deset dana. (<xref ref-type="bibr" rid="r34"><italic>34</italic></xref>)</p>
<p>Trenuta&#x010D;no nema podataka o koadministraciji PCV20 i cjepiva protiv RSV-a.</p>
</sec>
</body>
<back>
<fn-group>
<fn fn-type="conflict">
<p content-type="fn-title">INFORMACIJE O SUKOBU INTERESA</p>
<p>Autori nisu deklarirali sukob interesa relevantan za ovaj rad.</p>
</fn>
<fn fn-type="financial-disclosure">
<p content-type="fn-title">INFORMACIJA O FINANCIRANJU</p>
<p>Za ovaj &#x010D;lanak nisu primljena financijska sredstva.</p>
</fn>
</fn-group>
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