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The present study aimed at identifying the gastro-intestinal Strongyles of cattle and to evaluate the effect of albendazole on their population dynamics throughout the year. Three cattle farms located in the village of Velambai were used for the study. 175 animals were screened through coprological examination to assess their infection rate (IR) with gastro-intestinal nematodes. 50 Goudali were monitored from April 2015 to March 2016. Of these animals selected, 25 of them received albendazole on day 0 (D0) and constituted the treated group while the other 25 received nothing and stood for the non-treated group. Faeces were examined using the McMaster method to evaluate the efficacy of treatment and to monitor changes in faecal shedding of Strongyles. Faeces from animals were cultured to recover the infective L3 larval stage of Strongyles by the Baermann method. The survey revealed that Strongyles, Strongyloides and Toxocara were the main gastro-intestinal helminths infecting cattle with IRs of 64.5%, 15% and 24.1% respectively. Deworming at the beginning of the rainy season reduced the shedding of helminth eggs (EPG < 400) throughout the season. Percentage reduction in the number of eggs per gram of faeces (EPG) from Strongyles was 68% at day 30. Stool culture revealed the presence of four types of Strongyles with varying abundance depending on the genus (Trichostrongylus, Haemonchus, Cooperia and Oesophagostomum), animal group and month. The genera Trichostrongylus and Haemonchus were dominant throughout the year. Haemonchus spp were significantly sensitive to albendazole between D30 to D90. On D120, albendazole lost its effect with the genus Haemonchus which resulted in the re-infection of the animals, whereas this effect was rather late for the genus Oesophagostomum (from D270).

Efficacy of Albendazole on Gastro-Intestinal Strongyles of Cattle in Ngaoundere (Adamawa-Cameroon)