Comparative study between alcoholic extract of Allium sativus and Levozan in effect on Haemonchus contortus larvae

The current study show the prevalence of Haemonchus contortus in sheep in Tikrit city and its surroundings for the period from the beginning of July 2018 to August 2019. The study was carried out on 315 fecal samples from two genders, their ages between (6 months to 5 years). The results showed the eggs of the following:Nematodes: Haemonchus contortus, Marshallagia marshalli , Ostertagia circumcincta , Lung worms , Trichostrongylus spp , Nematodirus spp , Chabertia ovina, Strongyloides papillosus, Cooperia spp., Trematoda: Paramphistomum cervie. Cestoda: Moniezia spp.. The epidemiological study appeared that the rate of infection with Haemonchus contortus was 18.2%. The high rate of infection was among (1-2) years old. The distribution of infection was high in April (45%).Al-hamraa region recorded high rate of infection (32%) in comparative with other regions of the study. H. contortus recorded the highest severity of infection with average (1336 egg/gm of feces). The aim of this study was to explore the potential activities of the alcoholic extracts of garlic, with different concentrations 50, 75, 100 mg/ml ,on Haemonchus contortus larvae in vitro in comparative with Levazan drug ,. The result showed an effect of alcoholic extract of two plants on the larva in comparative with control group. It was found that the alcoholic extract of garlic had greater inhibitory effect and killed all the larvae during the fourth day, while the alcoholic extract of cloves killed the larva on the tenth day. The Levazan drug had the highest effect on larva, all the larvae were killed during 8 hr. of using the drug compared to control group.