Weight gain and the course of some estimators of gastrointestinal nematode infection in calves during winter housing in relation to the level of exposure during the previous grazing season
| Autor: | F.W. Rietveld, A. Kloosterman, Hw Ploeger, Paul Berghen |
|---|---|
| Rok vydání: | 1995 |
| Předmět: |
Veterinary medicine
Growth performance Gastrointestinal Diseases Ostertagia spp Antibodies Helminth Helminthiasis Cattle Diseases Biology Poaceae Weight Gain medicine.disease_cause Animal science Ostertagiasis Grazing Infestation medicine Veehouderij Animals Animal Husbandry General Veterinary Ostertagia General Medicine Animal Feed Housing Animal Cattle-Nematoda WIAS Housing Cattle Female Parasitology Cooperia spp Seasons Gastrointestinal nematode Helminthiasis Animal medicine.symptom Weight gain |
| Zdroj: | Veterinary Parasitology 56 (1995) Veterinary Parasitology, 56, 91-106 |
| ISSN: | 0304-4017 |
| DOI: | 10.1016/0304-4017(94)00681-2 |
| Popis: | In two experiments groups of calves were exposed to different levels and patterns of infection with Ostertagia spp. and Cooperia spp. The experimental design simulated the stereotypic pattern of herbage infestation, including a normal or a delayed midsummer increase, under conditions of set-stocking. After this simulated ‘first grazing season’, calves were monitored throughout the subsequent winter housing period. No continuing negative effects of previous infection on growth performance were observed. Calves in all groups gained on average over 0.7 kg day −1 , irrespective of previous level of exposure. Differences between the experiments with respect to either level or pattern of infection during the preceding ‘first grazing season’ were all, to a greater or lesser extent, reflected in faecal egg counts, pepsinogen values, gastrin values and antibody titres against Cooperia spp. or Ostertagia spp. Depending on the time of sampling, pepsinogen values and antibody titres against Ostertagia spp. particularly were useful variables for assessing differences in levels of infection to which groups of calves had been exposed. |
| Databáze: | OpenAIRE |
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