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Comparative Parasitology 67(2) 2000 - Peru State College

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260 COMPARATIVE PARASITOLOGY, <strong>67</strong>(2), JULY <strong>2000</strong><br />

2A<br />

Figure 2. Photomicrographs of Thelazia lacrymalis. Part of vagina (V) and uterus (U). A. Normal<br />

individual with 2 uteri. B. Abnormal individual with 3 uteri and embryos visible in each branch. Scale<br />

bar = 50 u,m.<br />

difficult to document. It is of interest that Becklund<br />

(1960) recorded an association of phenothiazine<br />

given to sheep and morphological<br />

anomalies of male Haemonchus contortus (Rudolphi,<br />

1803) Cobb, 1898.<br />

This investigation was done in connection<br />

with a project of the Kentucky Agricultural Experiment<br />

Station and is published with the approval<br />

of the director as paper No. 99-14-120.<br />

Literature Cited<br />

Becklund, W. R. 1960. Morphological anomalies in<br />

male Haemonchus contortus (Rudolphi, 1803)<br />

Cobb, 1898 (Nematoda: Trichostrongylidae) from<br />

sheep. Proceedings of the Helminthological Society<br />

of Washington 27:194-199.<br />

Benton, R. E., and E. T. Lyons. 1994. Survey in<br />

central Kentucky for prevalence of Anoplocephala<br />

perfoliata in horses at necropsy. Veterinary <strong>Parasitology</strong><br />

55:81-86.<br />

Chandler, A. C. 1924. A note on Ascaris lumbricoides<br />

Copyright © 2011, The Helminthological Society of Washington<br />

with three uteri and ovaries. Journal of <strong>Parasitology</strong><br />

10:208.<br />

Hyman, L. H. 1951. The Invertebrates, Volume 3.<br />

Acanthocephala, Aschelminthes, and Entoprocta.<br />

McGraw-Hill Book Co., Inc., New York. 572 pp.<br />

Lichtenfels, J. R. 1975. Helminths of domestic equids.<br />

Proceedings of the Helminthological Society of<br />

Washington 42 (special issue): 1-92.<br />

Lyons, E. T., S. C. Tolliver, J. H. Drudge, T. W.<br />

Swerczek, and M. W. Crowe. 1986. Eyeworms<br />

(Thelazia lacrymalis) in one to four-year-old<br />

Thoroughbreds at necropsy in Kentucky (1984-<br />

1985). American Journal of Veterinary Research<br />

47:315-316.<br />

, , K. J. McDowell, and J. H. Drudge.<br />

1997. Atypical external characteristics of Anoplocephala<br />

perfoliata in equids in central Kentucky.<br />

Journal of the Helminthological Society of<br />

Washington 64:287-291.<br />

Patton, S., and M. D. McCracken. 1981. The occurrence<br />

and effect of Thelazia in horses. Equine<br />

Practice 3:53-57.<br />

Proudman, C. J., and A. J. Trees. 1999. Tapeworms<br />

as a cause of intestinal disease in horses. <strong>Parasitology</strong><br />

Today 15:156-159.

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