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Faecal egg output and herbage contamination with infective larvae of species of Ostertagia and Oesophagostomum from naturally infected farmed sika deer Cervus nippon in Lithuania

Published online by Cambridge University Press:  01 March 2007

M. Šarkūnas*
Affiliation:
Department of Infectious Diseases, Lithuanian Veterinary Academy, Tilžės 18, LT–47181, Lithuania
S. Veličkaitė
Affiliation:
Department of Anatomy and Physiology, Lithuanian Veterinary Academy, Tilžės 18, LT–47181, Lithuania
R. Bružinskaitė
Affiliation:
Department of Infectious Diseases, Lithuanian Veterinary Academy, Tilžės 18, LT–47181, Lithuania
A. Malakauskas
Affiliation:
Department of Infectious Diseases, Lithuanian Veterinary Academy, Tilžės 18, LT–47181, Lithuania
S. Petkevičius
Affiliation:
Department of Infectious Diseases, Lithuanian Veterinary Academy, Tilžės 18, LT–47181, Lithuania
*
*Fax: +370 37 363 559 E-mail: minsar@lva.lt

Abstract

Faecal egg outputs and subsequent herbage larval contamination with third stage larvae (L3) of Ostertagia spp. and Oesophagostomum spp. from a herd of naturally infected sika deer Cervus nippon were examined in the same pasture in 2001/2002 in Lithuania. Sika deer were infected with Ostertagia circumcincta, O. kolchida, O. spiculoptera, Oesophagostomum radiatum, O. columbianum and O. venulosum. Faecal egg output in adult deer peaked in the spring during the periparturient period and also in late August, compared with a peak in egg output in calves during September to November. Herbage contamination with L3 of Ostertagia spp. peaked in June but larvae were not present on pastures from the end of September. Hence the highest risk of infection was in early born calves grazed on pastures in July. Infective larvae of Oesophagostomum spp. did not survive during the winter, but the nematodes were reintroduced onto the pastures by adult deer in the spring.

Type
Research Papers
Copyright
Copyright © 2007 Cambridge University Press 2007

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