Abstract:
:The internal colony-forming bacterial flora of the schistosome intermediate host snailBiomphalaria glabrata (Say) has been characterized in ca. 500 individual snails from Puerto Rico, Guadeloupe, and St. Lucia, and from laboratory aquaria. Freshly captured wild snails harbor 2-40×10(6) CFU·g(-1), and healthy aquarium snails harbor 4-16×10(7) CFU·g(-1), whereas moribund individuals have 4-10 times as many bacteria as healthy individuals from the same habitats.Pseudomonas spp. are the most common predominant bacteria in normal snails, whereasAcinetobacter, Aeromonas, andMoraxella spp. predominate in moribund snails. External bacterial populations in water appear to have little effect on the composition and size of the flora in any snail. In addition to normal (healthy) and moribund snails, a third group of snails has been distinguished on the basis of internal bacterial density and predominating genera. These "high-density" snails may have undergone stresses and may harbor opportunistic pathogens. The microfloras of wild and laboratory-reared snails can be altered and stimulated to increase in density by crowding the snails or treating them with antibiotics.
journal_name
Microb Ecoljournal_title
Microbial ecologyauthors
Ducklow HW,Clausen K,Mitchell Rdoi
10.1007/BF02010308subject
Has Abstractpub_date
1981-09-01 00:00:00pages
253-74issue
3eissn
0095-3628issn
1432-184Xjournal_volume
7pub_type
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journal_title:Microbial ecology
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journal_title:Microbial ecology
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journal_title:Microbial ecology
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