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Studies with Eperythrozoon parvum Splitter, 1950

Published online by Cambridge University Press:  06 April 2009

John Seamer
John Seamer
Affiliation:
School of Veterinary Medicine, University of Cambridge*
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Extract

1. The staining and morphology of E. parvum were characteristic of the genus Eperythrozoon. The diameter of the organism was approximately 250 mμ.

2. Visible eperythrozoa disappeared in 20 min. from infected blood incubated at 56° C., and in 12 hr. at 37° C. They persisted for several days at room temperature.

3. E. parvum was preserved for short periods at 5° C. and for longer periods at −30 and −79° C.

4. Splenectomized early-weaned piglets were experimentally infected by the parenteral and oral routes, and by means of the pig louse Haematopinus suis.

5. The mean prepatent period of 103 primary infections in splenectomized pigs was 9·7 days. Patent infections sometimes persisted for at least 36 days. One pig remained a carrier of E. parvum for 23 months.

6. A severe anaemia occurred in splenectomized piglets affected with E. parvum, but intact piglets were apparently unaffected.

7. E. parvum was susceptible in vivo to neoarsphenamine and oxytetracycline, but not to sulphadimidine, penicillin or streptomycin.

Type
Research Article
Information
Parasitology , Volume 50 , Issue 1-2 , May 1960 , pp. 67 - 80
Copyright
Copyright © Cambridge University Press 1960

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References

REFERENCES

Biberstein, E. L., Barr, L. M., Larrow, L. L. & Roberts, S. J. (1956). Eperythrozoonosis of swine in New York State. Cornell Vet. 46, 288–97.Google Scholar
Black, F. L. (1958). Relationship between virus particle size and filterability through gradocol membranes. Virology, 5, 391–2.CrossRefGoogle ScholarPubMed
Cannon, P. R. & McClelland, P. H. (1929). The transmission of Bartonella infection in albino rats. J. Infect. Dis. 44, 56–61.Google Scholar
Carle, B. N. & Dewhirst, W. H. (1942). A method for bleeding swine. J. Amer. Vet. Med. Ass. 101, 495–6.Google Scholar
Derrick, E. H., Pope, J. H., Chong, S. K., Carley, J. G. & Lee, P. E. (1954). Observations on infection of mice with Eperythrozoon coccoides Schilling. Aust. J. Exp. Biol. Med. Sci. 32, 577–82.CrossRefGoogle ScholarPubMed
Eliot, C. P. (1936). The insect vector for the natural transmission of Eperythrozoon coccoides in mice. Science, 84, 397.CrossRefGoogle ScholarPubMed
Jansen, B. C. (1952). The occurrence of Eperythrozoon parvum Splitter 1950, in South African swine. Onderstepoort J. Vet. Res. 25, 4–6.Google Scholar
Jennings, A. R. & Seamer, J. (1956). A new blood parasite in British pigs. Nature, Lond., 178, 153–4.CrossRefGoogle Scholar
Jones, L. M. (1954). Veterinary pharmacology and therapeutics. Ames, Iowa: Iowa State College Press.Google Scholar
Kessler, W. R. (1942). Preservation of Bartonella muris in the frozen state. Proc. Soc. Exp. Biol., N.Y., 49, 238–41.CrossRefGoogle Scholar
McCluskie, J. A. W. & Niven, J. S. F. (1934). The blood changes in rats and mice after splenectomy, with observations on Bartonella muris and Eperythrozoon coccoides. J. Path. Bact. 39, 185–96.CrossRefGoogle Scholar
Niven, J. S. F., Dick, G. W. A., Gledhill, A. W. & Andrewes, C. H. (1952). Further light on mouse hepatitis. Lancet, 2, 1952, 1061.Google Scholar
Polge, C. & Soltys, M. A. (1957). Preservation of trypanosomes in the frozen state. Trans. R. Soc. Trop. Med. Hyg. 51, 519–26.CrossRefGoogle ScholarPubMed
Seamer, J. (1959). Thesis submitted for the Ph.D. degree, University of Cambridge.Google Scholar
Splitter, E. J. (1950 a). Eperythrozoon suis n.sp. and Eperythrozoon parvum n.sp., two new blood parasites of swine. Science, 111, 513–14.CrossRefGoogle Scholar
Splitter, E. J. (1950 b). Eperythrozoon suis, the etiologic agent of ictero-anaemia or an anaplasmosis-like disease in swine. Amer. J. Vet. Res. 11, 324–30.Google ScholarPubMed
Splitter, E. J. (1952). Eperythrozoonosis in swine—filtration studies. Amer. J. Vet. Res. 13, 290–7.Google ScholarPubMed
Splitter, E. J. (1953). Eperythrozoon parvum, a filterable blood parasite of swine. Nature, Lond., 172, 40.CrossRefGoogle ScholarPubMed
Splitter, E. J. & Castro, E. R. (1957). Antibiotic therapy in acute eperythrozoonosis of swine. J. Amer. Vet. Med. Ass. 131, 293–4.Google ScholarPubMed
Splitter, E. J. & Williamson, R. L. (1950). Eperythrozoonosis in swine, a preliminary report. J. Amer. Vet. Med. Ass. 116, 360–4.Google ScholarPubMed
Thurston, J. P. (1953). The chemotherapy of Eperythrozoon coccoides (Schilling, 1928). Parasitology, 43, 170–4.CrossRefGoogle ScholarPubMed
Thurston, J. P. (1955). Observations on the course of Eperythrozoon coccoides infections in mice, and the sensitivity of the parasite to external agents. Parasitology, 45, 141–51.CrossRefGoogle ScholarPubMed
Weinman, D. (1938). On the cause of the anaemia in the bartonella infection of rats. J. Infect. Dis. 63, 1–9.CrossRefGoogle Scholar
Weinman, D. (1944). Infectious anaemias due to Bartonella and related red cell parasites. Trans. Amer. Phil. Soc. 33, part III, 243–350.CrossRefGoogle Scholar
Weinman, D. & McAllister, J. (1947). Prolonged storage of human pathogenic protozoa with conservation of virulence: observations on the storage of helminths and leptospiras. Amer. J. Hyg. 45, 102–21.Google ScholarPubMed