Lymnaea gedrosiana, an intermediate host of Fasciola hepatica in Iran.

摘要: The susceptibility of Lymnaea gedrosiana, a widespread snail in Iran, to Fasciola hepatica has been proven through two experiments. In the first experiment metacercariae collected from were fed white mice and rabbits; infection developed both rabbits. second whole life-cycle parasite was completed by getting miracidia eggs infected liver buffalo infecting laboratory-bred producing metacercariae. given three rabbits, all which became infected, F. flukes recovered animals. economic importance common fluke as health hazard domestic animals established years ago. Several hundred cases human with this have recorded parts world (Pantelouris, 1965). much Iran rate livestock is high. livers 1,302 southern part country showed an overall prevalence 31% (Sabbaghian et al., 1964). Buffalo had highest infection, 57%, 54% for cows, 35% sheep area. Reports are increasing (Sohrabi Amini, 1967). During survey bilharziasis other trematodes abundance gedrosiana observed many country. Khuzestan Province, located southwest where urinary occurs among population, particularly rural areas, L. found high density breeding places Bulinus truncatus, intermediate host S. haematobium, bovis, Paramphistomum (Arfaa, 1962; Arfaa 1965b, also Ornithobilharzia turkestanicum, trematode animals, prevalent (Arfaa 1965a). Received publication 16 October 1968. This study supported Institute Public Health Research, School Health, Teheran University, funds Plan Organization Ministry Project No. 63001. * University. t Dezful Bilharziasis Research Station, Inst. Research. MATERIALS AND METHODS 1. trial, field crushed cercariae released permitted encyst on inner surface jar. These 2. A trial undertaken complete life cycle parasites laboratory. For purpose buffalo, slaughter house, jar containing dechlorinated water. Miracidia started emerge 15 days later, used gedrosiana. Four Lymnnaca exposed, each five miracidia, kept jars water temperature ranging 25 28 C. Cercariae shed allowed polyethylene sheet so produced period 18 22 days. Different numbers removed razor blade Two methods feeding animals: method dropper, counted, directly animal per os. small piece lettuce after starving it 1 day. number well elapsed between autopsy varied different RESULTS DISCUSSION White autopsied 39 54 but no their viscera, while rabbits during 67 yielded liver, bile duct animal, rabbit. Results follows: Autopsy 50 69 revealed presence