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Kiedy najlepiej szczepić prosięta przeciw PCV2?
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Wyszukaj w serwisie


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Kiedy najlepiej szczepić prosięta przeciw PCV2?


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Skuteczność szczepionek przeciw PCV2 obecnych na rynku została wielokrotnie udowodniona w warunkach terenowych i polega na minimalizacji wpływu na zdrowie świń chorób związanych z PCV2 (PCVD). Regularne i powszechne stosowanie szczepionek w wielu fermach doprowadziło do zaniku zakażeń PCV2 przebiegających z objawami klinicznymi i utrzymywania się ich w formie bezobjawowej, a niekiedy do całkowitej eliminacji zakażeń i produkcji serologicznie ujemnych tuczników. W większości przypadków szczepienie przeciw PCV2 jest ekonomicznie uzasadnione.

Obecnie szczepienia prosiąt przeciw PCV2 prowadzi się najczęściej w wieku 3-4 tygodni (około odsadzenia). Nie wiadomo jednak, czy zawsze jest to wiek optymalny z punktu widzenia skuteczności. Decyzja o terminie szczepienia powinna być podjęta przy uwzględnieniu takich czynników, jak:

  • Odporność siarowa (MDI): wiadomo, że wysoki poziom przeciwciał siarowych (MDA) w czasie szczepienia może prowadzić do obniżenia poziomu odpowiedzi poszczepiennej. Takie zjawisko obserwuje się, kiedy poziom przeciwciał oznaczanych w teście IPMA jest wyższy niż 10 log2. Obecność wysokiego poziomu MDA nie wydaje się wpływać na odporność komórkową wywołaną szczepieniem. W celu uniknięcia takiej interferencji lub w celu podwyższenia skuteczności szczepienia należy rozważyć opóźnienie jego terminu. Może to być szczególnie ważne, jeśli stosuje się szczepienie zarówno loch, jak i prosiąt.
  • Rozwój układu odpornościowego prosiąt: stopień dojrzałości układu odpornościowego prosiąt nie jest dobrze poznany. Badania wykazały, że szczepienie przeciw PCV2 serologicznie ujemnych prosiąt w wieku 5 dni doprowadziło do uodpornienia przeciw zakażeniu tym wirusem. Oznacza to, że przynajmniej w tym wieku poziom rozwoju układu odpornościowego prosiąt jest [...]
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Mogą zainteresować Cię również


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Wizytówka firmy


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Sklep


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