Dynamics of gastrointestinal nematode egg shedding in goat flocks of the Chaco bioregion, Argentina
DOI:
https://doi.org/10.14409/favecv.2025.1.e0044Keywords:
Gastrointestinal nematodes, goats, Salta, epidemiologyAbstract
The present study aimed to describe the dynamics of gastrointestinal nematode (GIN) egg shedding in goat flocks from the Chaco Salteño region. To this end, fecal samples were collected every 45 days from adult and young goats belonging to two flocks to determine the number of eggs per gram of feces (EPG) using the McMaster technique and to differentiate the genera of infective larvae through coprocultures. The results showed generally low infection levels, although a peak was observed in April, particularly in one of the flocks, where 30% of the samples exceeded 1500 EPG. Egg counts were higher in young animals, and the predominant genera were Haemonchus spp. and Trichostrongylus spp. Haemonchus was more prevalent in summer and autumn, while Trichostrongylus predominated in autumn and winter. These findings highlight the importance of monitoring flocks at the end of summer and during autumn through coprological studies. Additionally, the implementation of the FAMACHA system is recommended to control Haemonchus in areas with greater pasture coverage.
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Copyright (c) 2025 Leandro Hipólito Olmos, Cristina Rosetto, Juan Pablo Díaz, Carlos Alberto Enriquez, Álvaro Francisco Ruiz, Victor Humberto Suarez
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