ISSN 2736-1756
Advanced Journal of Microbiology Research Vol. 2004
Available online at http://internationalscholarsjournals.org/journal/ajmr
© 2004 International Scholars Journals
Full Length Research paper
Dockovdia cookarum infection and the prosobranch gastropod Lanistes libycus host in Omi Stream, Ago-Iwoye, south-western, Nigeria
O. M. Agbolade1*, A. B. Odaibo2
1Department of Biological Sciences, Olabisi Onabanjo University, P.M.B. 2002, Ago-Iwoye, Nigeria.
2Department of Zoology, University of Ibadan, Ibadan, Nigeria.
Accepted 31 December 2003
Abstract
Dockovdia cookarum infection was studied in relation to the abundance and size classes of Lanistes libycus from Omi Stream, Ago-Iwoye, Nigeria, between September 1997 and June 1998. 57.6% of the 262 L. libycus recorded were collected during periods of heavy rainfall. 17.2% (45) of the L. libycus examined had D. cookarum infection. The water mite prevalences were higher in rainy season than in dry season, and ranged between 3.0% and 44.4% monthly. L. libycus in 21-30 mm size class had the highest prevalence (73.3%). Intensity of infection was higher in rainy season than in dry season, and ranged between 1 and 6 mite(s)/snail. 2.6% of the L. libycus specimens in the 21-30 mm size class had concurrent D. cookarum and Chaetogaster limnaei infections.
Key words: Dockovdia cookarum, water mites, Lanistes libycus, freshwater molluscs, Nigeria