Life Cycle of <i>Eimeria ferrisi</i> Levine &amp; Ivens, 1965 in the Mouse, <i>Mus musculus</i>

Ankrom, Susan L.; Chobotar, Bill; Ernst, John V.

doi:10.1111/j.1550-7408.1975.tb05177.x

Cited by 22 publications

(23 citation statements)

References 21 publications

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“…It differs from E. arasinaensis having a micropyl at the oocyst wall [9], and from E. hindlei and E. musculi lacking a residual body in the sporocyst [9,12]. The present species also differs from E. falciformis, E. ferrisi and E. papillata which prepatent periods are 4 to 5 days [1,4,8,10], and from E. contorta, E. hansonorum, E. musculoidei, E. papillata and E. vermiformis in the parasitized location of the host [5,9,10,11]. Although the morphological structure of sporulated oocysts, prepatent period and location in the host of the present species were similar to those of E. falciformis var.…”

Section: Discussionmentioning

confidence: 63%

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Life Cycle of Eimeria krijgsmanni-Like Coccidium in the Mouse (Mus musculus)

Matsui¹,

Fujino²,

Kobayashi³

et al. 2006

J. Vet. Med. Sci.

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ABSTRACT. Life cycle of Eimeria krijgsmanni-like coccidium isolated from the feces of naturally infected mice purchased from commercial sources was examined. The parasite was purified by single oocyst isolation and maintained by passage in the mice before experiments. The sporulated oocysts were ovoid or ellipsoid, measuring 19.3 × 14.8 μm on average. One or two small polar granules were present. Micropyle and oocyst residuum were absent. Sporocysts were ellipsoid, measuring 11.6 × 7.2 μm on average with a small Stieda body and sporocyst residuum. Six groups of respective 5 mice (4-week-old) were inoculated with doses varying from 2.0 × 10 1 to 10 6 oocysts. All the mice examined began to shed oocysts from 7 day postinoculation (PI) and their maximum number of oocysts per gram of feces were 10 6 on day 8 PI. Patency was 6 or 7 days. This parasite had severe virulence to the mice that is, the mice given 10 6 oocysts showed anorexia, diarrhoea and rough hair from 1 day and all of them died on day 3 PI. The mice given 10 3 or more oocysts showed the clinical signs described above from day 5 and 4 of them received 10 5 died on day 9 or 10 PI. The parasites occurred within the epithelial cells of cecum, colon and rectum of infected mice. Sporozoites, 13.9 × 3.0 μm, with two large refractil bodies on side of the nucleus located subcentrally were observed on day 1 and 2 PI. Merozoites were first observed at 24 hr PI, and sexual stages were found from 4 day PI. No parasites were detected in the small intestine and mecenteric lymph nodes. Fourteen species of murine Eimeria have been described, except E. pragensis which of E. falciformis [7]. However, the life cycles of 9 species other than E. contorta, E. falciformis, E. falciformis var. pragensis, E. ferrisi, E. papillata and E. vermiformis [1,5,7,8, 10,11] were not examined well. We isolated a virulent strain of Eimeria from the naturally infected mice purchased from commercial sources. The oocysts of this coccidium were morphologically similar to those of E. krijgsmanni [9,12]. However, the biological characteristics of E. krijgsmanni except oocyst morphology have not yet been clarified [9,12]. Therefore, the exogenous and endogenous stages of the coccidium were examined and compared with other eimerian species described in mice. MATERIALS AND METHODS Parasite:The parasite used in this study was first isolated from the faeces of naturally infected mice purchased from commercial sources. It was purified by a single oocyst isolation method [3] and maintained in the laboratory by routine passage through coccidia-free mice. Passaged oocysts were sporulated in 2% potassium dichromate solution at 25°C and stored at 4°C until use.Experimental animals: Mice used were of the SPF ICR strain aged 4-week-old. They were obtained from a commercial source, raised in a coccidia-free environment, and examined for oocysts in their faeces by the sugar floatation method (specific gravity of sugar solution, 1.266) prior to experimentation.Experimental procedures: Oocysts were washed in di...

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Section: Discussionmentioning

confidence: 63%

“…However, the life cycles of 9 species other than E. contorta, E. falciformis, E. falciformis var. pragensis, E. ferrisi, E. papillata and E. vermiformis [1,5,7,8, 10,11] were not examined well. We isolated a virulent strain of Eimeria from the naturally infected mice purchased from commercial sources.…”

mentioning

confidence: 99%

Life Cycle of Eimeria krijgsmanni-Like Coccidium in the Mouse (Mus musculus)

Matsui¹,

Fujino²,

Kobayashi³

et al. 2006

J. Vet. Med. Sci.

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“…The basic life cycle parameters of E. falciformis, E. ferrisi, E. papillata, and E. vermiformis have been examined by a number of different workers Ankrom et al 1975;Ernst et al 1971).…”

Section: Introductionmentioning

confidence: 99%

Oocyst production of four species of murine coccidia

Tilahun¹,

Stockdale²

1981

Can. J. Zool.

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Oocyst output and the reproductive potential of the four species of murine coccidia, Eimeria falciformis, E. ferrisi, E. papillata, and E. vermiformis were examined. Graded infections were produced by inoculating either 10, 102, 103, 104, or 105 sporulated oocysts to groups of mice. Oocyst production was estimated by examining all the feces passed. oocyst output was influenced by the size of the dose of oocysts. Maximum oocyst production per mouse was observed in groups of mice infected with 103 to 104 sporulated oocysts, after which, decline in oocyst output was observed despite increasing the dose of oocysts. The reproductive potential per oocyst given in each of the four species of Eimeria decreased as the dose of oocysts was increased. Mortality at rates of 60 and 40%, respectively, occurred in groups of mice infected with 105 sporulated oocysts of E. vermiformis and E. ferrisi.

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“…Eimeria have been described to be mostly found in either the small or the large intestine (Ankrom et al, 1975;Ernst et al, 1971;Haberkorn, 1970;Levine and Ivens, 1965 suggesting that there are no strict geographical or host subspecies constraints for this species.…”

Section: Discussionmentioning

confidence: 99%

Detection and quantification of house mouse Eimeria at the species level – challenges and solutions for the assessment of Coccidia in wildlife

Jarquín‐Díaz

Balard

Jost

et al. 2019

Preprint

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Detection and quantification of coccidia in studies of wildlife can be challenging. Therefore, prevalence of coccidia is often not assessed at the parasite species level in non-livestock animals.Parasite species -specific prevalences are especially important when studying evolutionary questions in wild populations. We might expect, for example, highly prevalent parasite species to have a lower virulence than lowly prevalent species.We studied free-living commensal populations of the house mouse (Mus musculus) in Germany, and established a strategy to detect and quantify Eimeria infections. We show that a novel diagnostic primer targeting the apicoplast genome (Ap5) and coprological assessment after flotation provide complementary detection results increasing sensitivity. Genotyping PCRs confirm detection in a subset of samples and cross-validation of different PCR markers does not indicate bias towards a particular parasite species in genotyping. We were able to detect double infections and to determine the preferred parasite occurrence along the distal-proximal axis of the intestine.Parasite genotyping from tissue samples provides additional indication for the absence of species bias in genotyping amplifications. Three Eimeria species were found infecting house mice at different prevalences: Eimeria ferrisi (16.1%; 95% CI 12.7 -20.2), E. falciformis (4.2%; 95% CI 2.6 -6.8) and E. vermiformis (1.1%; 95% CI 0.4 -2.7).We provide methods for the assessment of prevalences of coccidia at the species level in rodent systems. We discuss the need for broader species level assessment in Coccidia. Prevalence negatively correlates with virulence for Eimeria species of house mice, as the more prevalent E. ferrisi has been shown to be less virulent than E. falciformis. It is an open question whether house mouse Eimeria are host specialist and whether prevalence in our system correlates with host range.

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Life Cycle of Eimeria ferrisi Levine & Ivens, 1965 in the Mouse, Mus musculus

Cited by 22 publications

References 21 publications

Life Cycle of Eimeria krijgsmanni-Like Coccidium in the Mouse (Mus musculus)

Life Cycle of Eimeria krijgsmanni-Like Coccidium in the Mouse (Mus musculus)

Oocyst production of four species of murine coccidia

Detection and quantification of house mouse Eimeria at the species level – challenges and solutions for the assessment of Coccidia in wildlife

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