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Biomedical subjects

L E Collins

Publications and source records attributed to L E Collins.

5 recordsLinked to original sources
PubMed2002

Olfactory cues for oviposition behavior in Toxorhynchites moctezuma and Toxorhynchites amboinensis (Diptera: Culicidae).

In laboratory tests gravid female Toxorhynchites moctezuma (Dyar & Knab) and Toxorhynchites amboinensis (Doleschall) were offered the choice of black oviposition jars containing a diethyl ether extract of water collected from a natural oviposition site for these species (i.e., used tires), a dilution series of 4-methylcyclohexanol, 3-methylindole, 2-methylphenol, 3-methylphenol and 4-methylphenol, or solvent. Tire water extract and all test compounds acted as oviposition attractants and stimulants for both species, with the threshold amounts required to elicit these behaviors varying between the species and among the compounds tested.

Animals↗
PubMed2000

Colour cues for oviposition behaviour in Toxorhynchites moctezuma and Toxorhynchites amboinensis mosquitoes.

Gravid female Toxorhynchites moctezuma (Dyar and Knab) and Toxorhynchites amboinensis (Doleschall) were offered the choice of coloured (spray-painted) containers for oviposition in laboratory trials. Both species oviposited preferentially into black containers rather than into white, red, yellow, green, or blue containers. Black containers also acted as oviposition stimulants of Tx. moctezuma females, and black and red containers for Tx. amboinensis females. Absorption spectra were measured for the paints used, with red and black paints absorbing more light across most of the visible spectrum than the other colours.

Analysis of Variance↗
PubMed1986

Streptococci as urinary pathogens.

In a 2-month prospective study of streptococci isolated from urine specimens in the laboratory, 242 strains of catalase-negative gram-positive cocci or coccobacilli were isolated in substantial numbers from 11,725 specimens. These comprised 10% of the important isolates. Species identification of all isolates was undertaken. 74 (30%) of the isolates were of species other than Streptococcus faecalis and S agalactiae. 79 (33%) were not detected on cysteine-lactose-electrolyte-deficient agar after overnight incubation in a carbon dioxide incubator. 20 of the 24 isolates of coccobacilli were Gardnerella vaginalis. Many of the isolates of fastidious species were accompanied by pyuria. An isolation protocol practicable in busy laboratories is proposed.

Adolescent↗