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Przyczyny strat ciąży u bydła
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Wyszukaj w serwisie


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Najczęstsze zakaźne i niezakaźne przyczyny strat ciąży u bydła


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Jednym z nadrzędnych elementów w hodowli bydła, niezależnie od rasy i typu użytkowości, jest skuteczne zacielanie matek i rodzenie się żywych cieląt. Wydaje się, że z punktu widzenia rozrodczości największą trudnością w utrzymaniu rentownego stada jest samo zajście krowy w ciążę, co – przy obecnych wydajnościach i, wielokrotnie, problemach w wykrywaniu lub wykazywaniu rui – może stanowić istotny problem. Jednakże, mimo że zacielenie przez wielu hodowców traktowane jest jako pewny sukces – wiele krów traci ciążę. Uznaje się, że uzyskiwany u krów wskaźnik zacieleń sięga 90-100%, wskaźnik wycieleń natomiast to tylko około 30-55% (23, 31). Statystycznie więc ponad połowa zacielonych krów traci ciążę. Dodatkowo, problemy z zacieleniem stanowią jedną z podstawowych przyczyn brakowania ze stada, co przekłada się na dodatkowe straty ekonomiczne (23). Celem niniejszej pracy jest podsumowanie najczęściej występujących zakaźnych i niezakaźnych przyczyn strat ciąży u bydła.

Ciąża u krów trwa średnio 278-285 dni (2) i dzieli się na okres zarodkowy (od zapłodnienia do 42. dnia ciąży) i okres płodowy (od 42. dnia ciąży do porodu) (23). Strata ciąży może zdarzyć się na każdym etapie jej trwania, w oparciu o okres, w którym do niej doszło, straty te dzieli się na:

  1. Wczesną śmiertelność zarodkową (EED – ang. early embrionic death) – występującą pomiędzy zapłodnieniem a 25. dniem po inseminacji.
  2. Późną śmiertelność zarodkową (LED – ang. late embrionic death) – pomiędzy 25. a 42. dniem [...]
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Mogą zainteresować Cię również


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Wizytówka firmy


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Sklep


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