Variability in the fecal egg count and the parasitic burden of hair sheep after grazing in nematode infected paddocks
Pesqui. vet. bras
; 33(4): 469-475, Apr. 2013. ilus, tab
Article
em En
| LILACS
| ID: lil-675825
Biblioteca responsável:
BR68.1
ABSTRACT
This study aimed to evaluate the variability in the fecal egg count (FEC) and the parasitic burden of naive hair sheep after grazing in nematode infected paddocks. The research was carried out in Tabasco, Mexico, during two periods (August and December). In each period 32 lambs were grazed for one month on African star grass (Cynodon plectostachyus) contaminated with gastrointestinal parasitic nematodes. FEC, packed cell volume (PCV) and body weight (BW) were recorded. Gastrointestinal worms were recovered at necropsy. Data were analyzed with the MIXED procedure of SAS using a model of repeated measurements over time. A higher number of Haemonchus contortus worms was found in December (2814±838) than in August (1166±305). The opposite occurred with Cooperia curticei (2167±393 and 3638±441, respectively). The FEC and correlation coefficient in respect to the worm burden were higher in December (6516 ± 1599, r=0.83, respectively) than in August (4364±771, r=0.44, respectively). A high variability in resistance-susceptibility to gastrointestinal nematodes (GIN) occurred in Katahdin × Pelibuey lambs after grazing.
Palavras-chave
Texto completo:
1
Índice:
LILACS
Assunto principal:
Oesophagostomum
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Contagem de Ovos de Parasitas
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Ovinos
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Carga Parasitária
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Haemonchus
Limite:
Animals
Idioma:
En
Revista:
Pesqui. vet. bras
Assunto da revista:
MEDICINA VETERINARIA
Ano de publicação:
2013
Tipo de documento:
Article