Assessment of anthelmintic resistance in nematode parasites of sheep and goats owned by smallholder farmers in eastern Ethiopia

Sissay, Menkir M.; Asmare, A.; Uggla, A.; Waller, P.J.

doi:10.1007/s11250-006-4346-z

Cited by 22 publications

(21 citation statements)

References 7 publications

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“…Our result also contrasts the previous report of Kumsa and Wossene (2006b) and Sissay et al (2006a) which is most probably due to the differences in the origin and management of the study animals as both previous studies were conducted in small ruminants kept under extensive management system owned by smallholder farmers. In contrast to the University farm under extensive management system, the level of drug selection on worm population is much lower owing to a majority of parasites being in refugia, and lower frequencies of treatment.…”

Section: Discussioncontrasting

confidence: 99%

“…both in the control group and pretreatment coprocultures from all groups supports the finding of the pre FECRT survey and is in agreement with report of Thomas et al (2007) and Sissay et al (2006a).…”

Section: Discussionsupporting

confidence: 92%

“…Several previous studies conducted in different parts of Ethiopia indicate that gastrointestinal nematodes in goats are very common and widespread in all livestock systems in the country (Hussein et al 1999;Kumsa and Wossene 2006a;Sissay et al 2006a; Thomas et al 2007). The most commonly reported adverse effects of gastrointestinal nematodes in goats include: low productivity, decreased weight gain, unthriftness, delay in puberty, anorexia, hypoproteinaemia, loss of meat and wool, impaired digestive efficiency, organ condemnation, poor reproductive performance, and death of severely infected animals (Tembely et al 1997).…”

Section: Introductionmentioning

confidence: 98%

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Multiple anthelmintic resistance on a goat farm in Hawassa (southern Ethiopia)

Kumsa

Abebe

2008

Trop Anim Health Prod

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A study was conducted to determine the presence of anthelmintic resistance on Hawassa University goat farm in southern Ethiopia. The 180 goats were stratified by age and sex and randomly assigned to treatment groups (albendazole, tetramisole and ivermectin and untreated control). Each treatment group included 15 goats and treatments were administered according to weight of each goat with 7.5 mg/kg bw albendazole, 22.5 mg/kg bw tetramisole and 0.2 mg/kg bw ivermectin dose rates recommended by scientists. Faecal samples were collected on day 0 before treatment, and again on day 12 post treatment. Efficacy of all the drugs was assessed on day 12 post treatment by faecal egg count reduction test (FECRT). Multiple anthelmintic resistance in Haemonchus spp. against albendazole, tetramisole and ivermectin was recorded in all age categories of the goats. Likewise, Trichostrongylus/Teladorsagia spp. showed resistance against ivermectin. Coprocultures from all pre- and post-treatments revealed the predominance of Haemonchus spp. Resistance against anthelmintics is attributed to the high frequency of treatment and low dosage of treatment practices on the farm. Large scale studies, however, are needed to assess the current status of anthelmintic resistance against the most commonly used anthelmintics in different agroecology, species of animals and management systems in Ethiopia.

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Section: Discussioncontrasting

confidence: 99%

Section: Discussionsupporting

confidence: 92%

Section: Introductionmentioning

confidence: 98%

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Multiple anthelmintic resistance on a goat farm in Hawassa (southern Ethiopia)

Kumsa

Abebe

2008

Trop Anim Health Prod

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“…According to WAAVP recommendations, an evidence of development of resistance in GINs, particularly H. contortus and Trichostrongylus spp., against OXF preparations was found. Previously, benzimidazole resistance against these worms have also been reported in goats (Chartier et al 1995(Chartier et al , 1998Sissay et al 2006;Cringoli et al 2007). …”

Section: Discussionmentioning

confidence: 91%

Prevalence of multiple anthelmintic resistant gastrointestinal nematodes in dairy goats in a desolated tract (Pakistan)

et al. 2008

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This paper presents the first report of anthelmintic resistance (AR) in dairy goats in a desert (Pakistan). Three breeds of dairy goats, i.e. Dera Din Panah, Pak Angora and Beetal, kept at Government Livestock Farm, Rakh Khairewala, district Jhang/Layya, Pakistan, were surveyed for gastrointestinal nematodes (GINs) resistant to commonly used three anthelmintics, i.e. benzimidazole, levamisole and ivermectin. Sixty animals of each breed were selected randomly on the basis of their weight and egg count. Three commonly used anthelmintics, viz., oxfendazole (three different preparations of oxfendazole: fendamex, oxazole, systamex), levamisole and ivermectin, were given at the recommended dose to five groups while one untreated group was kept as control for each breed. Faecal egg counts, faecal egg count reduction test, postmortem worm count and copro-culture were performed to assess the efficacy of selected anthelmintics. The prevalent species of GINs exhibited resistance against all three preparations of oxfendazole. Levamisole in two breeds and ivermectin in all the breeds led to reduction (P< or =0.05) of prevalent species of GINs in both flocks. Haemonchus controtus and Trichostrongylus species exhibited the presence of resistance against oxfendazole preparations which exhibited low efficacy (P> or =0.05). The farm management practices along with the results of the present study revealed the presence of multiple anthelmintic resistant GINs of dairy goats kept in a desolated tract.

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“…Because of the universal practice of communal grazing, it is of fundamental importance to attempt to achieve agreement amongst small-holders within each community who share common grazing pasture, to coordinate timing and method of treatment in their animals. It has been previously demonstrated that anthelmintic resistance is not present in nematode parasites of sheep and goat flocks owned by small-holder farmers in this region (Sissay et al 2006), therefore any broad-spectrum anthelmintic (provided it is from a reputable manufacturer) could be used. To obtain widespread compliance will not only require a concerted effort by livestock advisers in the area, but also provisions of regular and appropriate veterinary extension services (including subsidizing the cost of anthelmintic treatment) to the small-holder farmers in the region.…”

Section: Discussionmentioning

confidence: 99%

Prevalence and seasonal incidence of nematode parasites and fluke infections of sheep and goats in eastern Ethiopia

Sissay

Uggla

Waller

2007

Trop Anim Health Prod

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A 2-year abattoir survey was carried out to determine the prevalence, abundance and seasonal incidence of gastro-intestinal (GI) nematodes and trematodes (flukes) of sheep and goats in the semi-arid zone of eastern Ethiopia. During May 2003 to April 2005, viscera including liver, lungs and GI tracts were collected from 655 sheep and 632 goats slaughtered at 4 abattoirs located in the towns of Haramaya, Harar, Dire Dawa and Jijiga in eastern Ethiopia. All animals were raised in the farming areas located within the community boundaries for each town. Collected materials were transported within 24 h to the parasitology laboratory of Haramaya University for immediate processing. Thirteen species belonging to 9 genera of GI nematodes (Haemonchus contortus, Trichostrongylus axei, T. colubriformis, T. vitrinus, Nematodirus filicollis, N. spathiger Oesopha-gostomum columbianum, O. venulosum, Strongyloides papillosus, Bunostomum trigonocephalum, Trichuris ovis, Cooperia curticei and Chabertia ovina), and 4 species belonging to 3 genera of trematodes (Fasciola hepatica, F. gigantica, Paramphistomum {Calicohoron} microbothrium and Dicrocoelium dendriticum) were recorded in both sheep and goats. All animals in this investigation were infected with multiple species to varying degrees. The mean burdens of adult nematodes were generally moderate in both sheep and goats and showed patterns of seasonal abundance that corresponded with the bi-modal annual rainfall pattern, with highest burdens around the middle of the rainy season. In both sheep and goats there were significant differences in the mean worm burdens and abundance of the different nematode species between the four geographic locations, with worm burdens in the Haramaya and Harar areas greater than those observed in the Dire Dawa and Jijiga locations. Similar seasonal variations were also observed in the prevalence of flukes. But there were no significant differences in the prevalence of each fluke species between the four locations. Overall, the results showed that Haemonchus, Trichostrongylus, Nematodirus, Oesophagostomum, Fasciola and Paramphistomum species were the most abundant helminth parasites of sheep and goats in eastern Ethiopia.

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Assessment of anthelmintic resistance in nematode parasites of sheep and goats owned by smallholder farmers in eastern Ethiopia

Cited by 22 publications

References 7 publications

Multiple anthelmintic resistance on a goat farm in Hawassa (southern Ethiopia)

Multiple anthelmintic resistance on a goat farm in Hawassa (southern Ethiopia)

Prevalence of multiple anthelmintic resistant gastrointestinal nematodes in dairy goats in a desolated tract (Pakistan)

Prevalence and seasonal incidence of nematode parasites and fluke infections of sheep and goats in eastern Ethiopia

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