PMID: 9187035Apr 1, 1997Paper

Gastrointestinal nematode infections of first-season grazing calves in Belgium: general patterns and the effect of chemoprophylaxis

Veterinary Parasitology
D J ShawP Dorny

Abstract

Comparative analyses of the patterns of gastrointestinal nematode infections of first-grazing season cattle in Belgium are presented. The analysis involves 17 studies covering a 10 year period on 13 different farms in Flanders, Belgium. In all studies the calves were divided into an untreated control group, and one or two groups treated with chemoprophylactic systems. Two general infection levels emerged-'sub-clinical' (14 studies) and 'clinical' (three studies). The 'sub-clinical' infections were characterised by no clinical signs of parasitic gastroenteritis in the untreated control groups. Mean faecal egg counts remained low (less than 200), maximum pepsinogen levels only reached about 3500 mU tyrosine, and very small reductions in overall daily weight gain were observed compared with calves given chemoprophylaxis (less than 40 g day-1). Based on these results, on these 'sub-clinical' farms, chemoprophylaxis may not have been needed. In contrast, multiple salvage treatments of the control calf groups were required in the 'clinical' infections. Even with these salvage treatments mean faecal egg counts were high (more than 300), maximum pepsinogen levels were over 5500 mU tyrosine and there was a very large reduction in overal...Continue Reading

References

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Citations

Jan 23, 1999·Research in Veterinary Science·P Dorny, J Vercruysse
Aug 23, 2001·Veterinary Parasitology·J Vercruysse, E Claerebout
Mar 3, 2009·Veterinary Parasitology·N Kemper, C Henze
Oct 26, 2006·Journal of Veterinary Medicine. B, Infectious Diseases and Veterinary Public Health·C NogaredaM Cordero del Campillo
Mar 17, 2015·Veterinary Parasitology·J O'ShaughnessyT de Waal
Jun 14, 2006·Veterinary Parasitology·Jennifer K KetzisJos G M Houdijk
May 28, 2019·Irish Veterinary Journal·James O'ShaughnessyMaresa Sheehan
Jun 28, 2005·Veterinary Parasitology·Michael JägerHorst Zahner

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