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1

A new species of Eimeria (Apicomplexa: Eimeriidae) from tri-colored bats, Perimyotis subflavus (Chiroptera: Vespertilionidae), from the Ouachitas of Arkansas

100%
McAllister C. T., Seville R. S., Arlen R., Connior M. B.
Acta Parasitologica
|
2014
|
tom 59
|
nr 4
Between February 2013 and October 2013, eleven tri-colored bats, Perimyotis subflavus were collected from Marion, Polk, and Searcy counties, Arkansas, and their faeces examined for coccidian parasites. Two of eleven (18%) harboured an eimerian that we describe here as new. Oocysts of Eimeria mcdanieli sp. n. were ellipsoidal to elongate with a bi-layered wall and measured (length × width, L × W) 28.3 × 17.9 μm, with an L/W ratio of 1.6. A micropyle and oocyst residuum were absent but a single polar granule was present. Sporocysts were ovoidal, 12.6 × 8.3 μm, with an L/W ratio of 1.5. A pronounced, nipple-like Stieda body was present as well as a substieda body. A sporocyst residuum was present as dispersed bubble-like granules. This is the third coccidian described from tri-colored bats and the sixth species reported from Arkansas chiropterans. In addition, both infected bats harbored a concurrent infection of Eimeria heidti McAllister, Burt, Seville, and Robison, 2011.
2

A new species of coccidia (Apicomplexa: Eimeriidae) from Cordillera striped shrew-rat, Chrotomys whiteheadi (Rodentia: Muridae), from the Philippines

100%
McAllister C. T., Seville R. S., Duszynski D. W., Bush S. E.
Acta Parasitologica
|
2014
|
tom 59
|
nr 4
During July 2011, a single Cordillera striped shrew-rat (Chrotomys whiteheadi) was collected from the Philippines and its faeces examined for coccidian parasites. It harboured an eimerian that we describe here as new. Oocysts of Eimeria macarthuri sp. n. were spheroidal to subspheroidal with a bi-layered wall and measured (length × width, L × W) 18.2 × 17.0 μm, with an L/W ratio of 1.1. A micropyle, oocyst residuum and polar granule were absent. Sporocysts were ovoidal, 9.0 × 6.4 μm, with an L/W ratio of 1.3. A nipple-like Stieda body was present as well as a substieda body. A granular sporocyst residuum was present. To our knowledge, E. macarthuri represents the only coccidian ever described from a rodent of the Philippines.
3

Helminth (Cestoda, Nematoda) and coccidian (Apicomplexa: Eimeriidae) parasites of the eastern small-footed myotis, Myotis leibii (Chiroptera: Vespertilionidae) from Arkansas, with a description of a new species of Eimeria

100%
McAllister C. T., Seville R. S., Bursey C. R.
Acta Parasitologica
|
2017
|
tom 62
|
nr 2
4

Oocyst production in multispecific eimerian infections in the Wyoming ground squirrel, Spermophilus elegans elegans

100%
Thomas D. M., Seville R. S., Stantom N. L.
Acta Parasitologica
|
1992
|
tom 37
|
nr 3
We have investigated a stable assemblage of 6 species of Eimeria in the intestine of the Wyoming ground squirrel consisting of three abundant species (E. beecheyi, E. callospermophili and E. morainensis) and three rare species E. larimerensis, E. bilamellata and E. spermophili). To test the hypothesis that no interactions occur among these parasite species, five squirrels were inoculated with 12,500 oocysts consisting of 1 E. larimerensis, 10 E. bilamellata, 22 E. beecheyi and 67 % E. callospermophili. The proportion of each species in the output was quite different: 41 E. larimerensis, 5 E. beecheyi, 0 E. bilamellata and 54% E. callospermophili. When the same squirrels were reinoculated with 10,000 oocysts of 85 E. larimerensis, 7 E. beecheyi and 8% E. callospermophili, the output was 9 E. larimerensis, 13 E. beecheyi and 78% E. callospermophili. In the initial infections, the intrinsic rate of increase (r) for E. larimerensis was considerably higher than that of E. beecheyi or E. callospermophili. During the reinfections, (r) for E. larimerensis was significantly lower and for E. beecheyi and E. callospermophili significantly higher than initial values. Although E. larimerensis appears to have initially compromised the reproductive potential of its congenerics, acquired host immunity may have caused its reduced reproductive potential in the second trial.
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