Data/hora: 10/06/2024 03:47:53

Biblioteca(s): | Embrapa Caprinos e Ovinos.
Data corrente: | 24/04/1996
Data da última atualização: | 24/04/1996
Autoria: | HOSTE, H.; CBARTIER, C.
Título: | Comparison of the effects on milk production of concurrent infection with haemonchus contortus and trichostrongylus colubriforms in high-and low producing dairy goats.
Ano de publicação: | 1993
Fonte/Imprenta: | American Journal of Veterinary Research, v.54, n.11, p.1886-1893, 1993.
Idioma: | Inglês
Conteúdo: | The impact of nematode parasitism of the digestrive tract on milk output and milk quality was examined in dairy goats. ln addition, the consequences of worm infection were compared in goats with different lactation performance (ie, with initial high or low milk production). Forty-eight goats in the second month of lactation were allotted equally to 2 groups. The first group was given 5,000 Haemonchus contortus and 20,000 Trichostrongylus colubrifonnis larvae. The 24 additional goats remained free of parasites. Parasitologic, serologic, and milk data were collected every 2 weeks for 5 months, and body con. dition of the goats was scored throughout the study. Results of strongyle egg count in feces, increase in pepsinogen values, and reduction in RBC count, PCV, and serum inorganic phosphate concentration indicated subclinical infection. This subclinical parasitism induced a decrease in body condition scoring and led to persistent decrease in milk yield, ranging from 2.5 to 10% reduction from control values. Changes in fat and protein contents were not detected. ln contrast, the consequences of infection were more severe in the 6 goats with the highest milk production at the start of the study. Decrease in milk tween bath subgroups. According to parasitologic and pathologic data, high-producer goats had less resistance and/or resilience to infection associated with more severe consequences on milk production.
Palavras-Chave: | Caprinos; Infeccao Parasitaria; Nematodeo Gastritestinal.
Thesagro: | Infecção; Leite; Parasitologia.
Categoria do assunto: | --
Registro original: | Embrapa Caprinos e Ovinos (CNPC)
Exemplares: | CNPC - (2633-1) - ADC - AP - -- -  -  - 1996.00000 - DIS