Displacement of Biomphalaria glabrata by Thiara granifera under natural conditions in the Dominican Republic.
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After a study of the population dynamics of Biomphalaria glabrata snails in several breeding places in the Dominican Republic, the snail Thiara granifera was introduced in some B. glabrata habitats. T. granifera became established in one point in one habitat in the town of Quisqueya, in the east of the country. Around this point of establishment 6 points were selected in order to observe the population dynamics of both species of snails and the chemical and biological characteristics at each point. Four of these points already harbored B. glabrata. One control point was selected also harboring B. glabrata. After 14 months of observations, the results showed that T. granifera was competing with and displacing B. glabrata. This competition does not seem to be competition for food or vital space. Rather, B. glabrata avoids the presence of T. granifera and moves away to new areas, and this is possibly due to a chemical substance(s) secreted by T. granifera or by physical contact with the large number of individuals of T. granifera. (+info)
Outbreak of Mycobacterium abscessus wound infections among "lipotourists" from the United States who underwent abdominoplasty in the Dominican Republic.
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First report of zygospores in Asellariales and new species from the Caribbean.
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We report the inedited occurrence of zygospores in symbiotic Asellariales (Zygomycota) from Puerto Rico and Dominican Republic. Two new species of Asellaria are described, Asellaria dactylopus and A. jatibonicua, both found in the hindgut of terrestrial isopods. The presence of spherical zygospores in the latter species represents a novelty for the order. The related gut-fungi Harpellales were known to produce sexual spores, characteristically conical or biconical. Order Asellariales is emended to include the description of zygospores. An undetermined species of Orchesellaria also is reported from the Caribbean. Comments are provided for each of the species as well as drawings and photographs to illustrate each taxon. (+info)
Tuberculosis screening of travelers to higher-incidence countries: a cost-effectiveness analysis.
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