The mean, distribution and repeatability of faecal egg counts in Polish Wrzosowka ewes following natural gastrointestinal nematode infection during two pasture seasons

• Autorzy: Moskwa B , Charon K M , Cabaj W , Rutkowski R
• Języki publikacji: EN

Abstrakty

EN

Faecal egg counts per gram of faeces (EPGs) were measured over a period of two years (1995-1996) in Polish Wrzosówka ewes. Measurements were made at monthly intervals. The first examination in each years was conducted before the start of the grazing season, while the rest of the samples were collected during grazing season. The animals were drenched in May 1996 but not in 1995. EPG were estimated by modified McMaster method and were transformed by log (EPG+1) prior to analyses. Infective larvae of nematode species were identified according to the method described in Anonymous (1986). Meteorological data were collected to evaluate the influence of rainfall and temperature on the faecal egg counts. The MINITAB programme was used to calculate the correlation coefficient between EPGs in different sampling. There was substantial variation among individuals in their EPG. Several nematode species were present; however two nematode genera were dominant: Haemonchus contortus and Trichostrongylus sp. The mean count and the composition of the nematode population was influenced by the weather conditions. H. contortus was the main egg producer during the period of high mean counts when the temperature and rainfall were highest. The correlations between EPG on successive sampling were positive and nearly always significant.

Słowa kluczowe

EN

nematode species; fecal egg; infection; gastrointestinal nematode; Haemonchus contortus; ewe; grazing season; temperature; anthelminthic treatment; Polish Wrzosowka ewe; pasture season; Trichostrongylus; rainfall; distribution

• Wydawca: -
• Czasopismo: Acta Parasitologica
• Rocznik: 1998
• Tom: 43
• Numer: 2
• Opis fizyczny: p.94-99,fig.

Twórcy

autor

Moskwa B

• W. Stefański Institute of Parasitology, Polish Academy of Sciences, Twarda 51-55, 00-818 Warsaw, Poland

autor

Charon K M

• Department of Genetics and Animal Breeding, Warsaw Agriculture University, Przejazd 4, 05-840 Brwinów, Poland

autor

Cabaj W

• W. Stefański Institute of Parasitology, Polish Academy of Sciences, Twarda 51-55, 00-818 Warsaw, Poland

autor

Rutkowski R

• Department of Genetics and Animal Breeding, Warsaw Agriculture University, Przejazd 4, 05-840 Brwinów, Poland

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