The Life Cycle and Pathogenicity of Eimeria arloingi (Marotel, 1905) Martin, 1909, in Angora Kids and an Attempt at its Transmission to Lambs*

Abstract

Many investigators believed for many years that Eimeria arloingi occurred in both sheep and goats and was the most common coccidium of these animals (DAVIES et al., 1963;PELLERDY, 1974). LEVINE and IVENCE (1970) reviewed the information on E. arloingi of sheep and goats and concluded that the forms in these two hosts are not the same species and named the form in sheep Eimeria owina and the form in goats Eimeria arloingi. KRYLOV (1961), TSYGANKOVE et al. (1963) and LOTZE et al. (1964 attempted to transmit E. owina from sheep to goats and E. arloingi from goat to sheep, but failed to produce clearcut infection. O n the other hand LOTZE et al. (1964) claimed that the schizonts had developed in the mesenteric lymph nodes of both sheep and goats inoculated with the sporulated oocysts of E. owina. DEIANA and DELITALA (1953) found that the lambs inoculated with the oocysts of E. arloingi discharged oocysts in their faeces. LEVINE et al. (1962), SINGH and PANDE and SAYIN (1965) found schizonts and gamonts in the small intestine of kids and assumed that they belonged to E. arloingi but they were in fact dealing with a mixed infection. GILL and KATIYAR (1961), SHARMA DEORANI (1966) and SAYIN (1965) described an outbreak of enteritis associated with lesions in the * 383 small intestine of naturally infected kids which they considered due to E. arloingi. DEIANA and DELITALA (1953) and PANDE et al. (1967) reported histclogical changes in lesions of the small intestine of naturally infected kids and considered them to be due to E. arloingi. In these cases it is uncertain whether the lesions were caused by E. arloingi or by another coccidium. All these data indicated that the endogenous phase of the life-cycle and the pathogenicity of E. arloingi are uncertain. This study was therefore undertaken to provide more evidence upon the life-cycle and pathogenicity of E. arloingi and its relationship with E. ovina. Material and MethodsA total of 42 parasite-free animals, 28 Angora kids and 14 Merino lambs, 1 week or less in age, were obtained during the spring of 1976 and 1977. They were kept in individual pens throughout the experiment. Each pen had a concrete floor, covered with straw which was replaced twice weekly. The animals were fed cow's milk and had daily access to dry alfalfa, mixed grain and water. When the animals were 6 weeks old they were inoculated. 212-216.

Experimental caprine coccidiosis caused by Eimeria arloingi: Morphopathologic and electron microscopic studies

“…The early clinical signs of kids inoculated with 1×10 5 oocysts (group B) were more severe than group A. These findings were consistent with other reports (Dai et al 2006;Sayin et al 1980). The kids began oocyst sheding 16-18 days after inoculation and continued during the experiment.…”

“…Later, the information on E. arloingi in sheep and goats reviewed and stated that this species in these two hosts are not the same and named E. arloingi in goats and E. ovina in sheep (Levine and Ivens 1970). The investigations failed to transmit these species to another host and concluded they are host specific (Sayin et al 1980). …”

“…For the first time, E. arloingi was originally described from the goat by Marotel in 1905 under the name Coccidium arloingi. Then, Sayin et al (1980) showed some evidences of the life cycle and pathogenesity of E. arloingi in 6 months Angora kids, but the morphohistopathological lesions and exact affected organs and tissues due to infection of this species still are not fully clear. For many years, researchers believed that the E. arloingi occurred in both sheep and goats.…”

“…More than 15 Eimeria species were identified in goats but 4 of them including E. ninakohlyakimovae, E. arloingi, E. christenseni and E. caprina were considered to be the most pathogenic species or major concerns (Jalila et al 1998;Koudela and Bokova 1998;Razavi and Hassanvand 2007;Sayin et al 1980). Coccidial infection in goats resulting from complex interactions between parasites and host with many factors influencing the severity of disease.…”

Genetic characterization and phylogenetic analysis of Eimeria arloingi in Iranian native kids

“…More than 15 Eimeria spp. were identified in goats but four of them including Eimeria arloingi, Eimeria ninakohlyakimovae, Eimeria christenseni, and Eimeria caprina were considered to be the most pathogenic species (Sayin et al 1980;Jalila et al 1998;Koudela and Bokova 1998;Razavi and Hassanvand 2007). E. arloingi, a common coccidian species of goats worldwide, causes high mortality in kids and leads to economic loss from both subclinical and clinical infections (Radostits et al 1994;Jalila et al 1998).…”