Natural antibiotic resistance of bacteria isolated from larvae of the oil fly, Helaeomyia petrolei

Article Abstract:

Bacteria that live in the gut of the oil fly Helaeomyia petrolei appear to be naturally resistant to many antibiotics and could serve as a reservoir of antibiotic resistance genes. They are also tolerant of organic solvents, indicating that they may have developed efflux pumps.

Drug resistance in microorganisms, Microbial drug resistance, Flies, Diptera

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Inoculum size effect in dimorphic fungi: extracellular control of yeast-mycelium dimorphism in Ceratocystis ulmi

Article Abstract:

The inoculum size effect in Ceratocytis ulmi, the dimorphic fungus that causes Dutch elm disease, is examined. The aim of the study is to determine how similar the inoculum size effect in fungi is to quorum sensing bacteria, whether dimorphic fungi other than C. albicans use similar signaling systems, and whether farnesol can initiate cross talk between C. albicans and those other fungi.

Science & research, Genetic aspects, Yeast fungi, Yeasts (Fungi), Genetic research, Mycelium

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Microbiology of the oil fly, Helaeomyia petrolei

Article Abstract:

An examination of larvae of the oil fly, Helaeomyia petrolei, from the asphalt seeps of Rancho La Brea in Los Angeles, CA, for microbial gut contents revealed that these contain ca 2 x 10(super 5) heterotrophic bacteria. The bacteria found in oil fly larvae are neutrophiles, facultative or obligate aerobes and nonsporeformers, almost all of which are gram negative. Acridine orange staining showed that the culturable bacteria represented 15% to 20% of the total population. There was no evidence found that the 14 isolates chosen grew on derived nutrients from the asphalt or that they had a major role in insect development.

Analysis, Intestines, Intestinal microbiology, Insects, Insect larvae, Larvae

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