Ograniczanie wyników

Czasopisma help
Autorzy help
Lata help
Preferencje help
Widoczny [Schowaj] Abstrakt
Liczba wyników

Znaleziono wyników: 119

Liczba wyników na stronie
Pierwsza strona wyników Pięć stron wyników wstecz Poprzednia strona wyników Strona / 6 Następna strona wyników Pięć stron wyników wprzód Ostatnia strona wyników

Wyniki wyszukiwania

Wyszukiwano:
w słowach kluczowych:  epizootiologia
help Sortuj według:

help Ogranicz wyniki do:
Pierwsza strona wyników Pięć stron wyników wstecz Poprzednia strona wyników Strona / 6 Następna strona wyników Pięć stron wyników wprzód Ostatnia strona wyników
On the basis of post-slaughter examinations there was assessed the dynamics of the nodular form of enzootic bovine leukaemia (EBL) occurrence in the Lower Salesia region in 1960—1974 and its distribution in Poland in 1984. There was paid attention to the reasons of EBL spreading, the percentage of infections in large-scale cowsheds, the relationship between the age of animals and the degree of a herd infection, and some problems associated with the control of the disease. In 36 large-scale cowsheds there were assessed 4499 cows using the AGID test. The index of infection in individual herds ranged from 12 to 82%. The process of cowsheds recovery was based on the healthy system of calves and heifers breeding. Calves, fed colostrum taken from their own mothers, were separated from udalt cows and fed milk-replacement liquids. The first serological assessments were performed in calves aged 4 months, that permitted for a quick elimination of infected animals. Consecutive examinations were carried out every 4 months until the recevery of a herd was stated.
Thirty seven pregnant heifers were imported from Germany to the Legnica district. Both in imported animals and in local cattle symptoms resembling IBR appeared one week after the introduction of the imported animals. Clinical symptoms were more pronounced in the local cattle. Sera from 35 imported heifers and 69 local cattle were examined against IBR by the SNT and ELISA (Trachitest, Bommeli). Positive results with BHV-1 were obtained with 82.9% sera of imported heifers in ELISA and with 48.6% of sera in the SNT. After 3 months of exposition of local cattle 74% of these animals reacted positively in ELISA and 55% in the SNT. Clinical symptoms and serological data confirmed the fact that BHV-1 was transferred with the imported animals and that this virus caused dangerous effects herds free of BHV-1.
The studies were carried out on 67 fish coming from six breeding stations. It was found that the fish were a potential reservoir of A. hydrophila and therefore might be a source of infections and alimentary poisonings in humans. From the surface of fish there were isolated 17 strains of A. hydrophila (25.3%), from the homogenates of internal organs — 10 strains (14.9%) and from muscles — 2 strains (2.9%). All the examined strains were susceptible to streptomycin, neomycin, gentamycin, chloramphenicol and nalidixic acid. They were resistant to penicillin, ampicillin and tylosin. As to other antibiotics: 83% strains were susceptible to oxytetracycline, 25% to sulphonamides, 55% to trimethoprin plus sulphametozazol and 25% to nitrofurantoin.
Pierwsza strona wyników Pięć stron wyników wstecz Poprzednia strona wyników Strona / 6 Następna strona wyników Pięć stron wyników wprzód Ostatnia strona wyników
JavaScript jest wyłączony w Twojej przeglądarce internetowej. Włącz go, a następnie odśwież stronę, aby móc w pełni z niej korzystać.