Isolation and Characterization of Some Bacterial Strains From Dipteran Larvae

The isolation of agronomically beneficial bacteria usually involve the collection of samples from various natural sources, followed by the subsequent use of selective culture techniques. This is not always a straightforward process, due to various reasons, including their reduce concentration level in nature, the difficulty of separating them from the consortia in which they are naturally integrated in the environment, the overgrowth of other competing microorganisms, or even their fastidious way of in vitro multiplication. The aim of this work was to identify six bacterial strains that could have potential biotechnological applications, either as agro-inoculants or in environmental protection. These bacterial strains, named LvD1, LvD2, LvD3, LvD4, LvD5, and LvD6 were isolated from dead larvae of Calliphora vomitoria. Their identification at specie level was made based on their physiological profile using Biolog GEN III technique. The LvD1 strains, was identified as Acinetobacter guillouiae, a bacterial species highly valuable in bioremediation and biocontrol. Another strain, LvD3 was identified as Proteus mirabilis, a bacterial species mentioned as biocontrol agent, as well as a plant growth promoter, while LvD4 was identified as Enterococcus faecalis, another bacterial species with plant growth promoting features. However, complementary studies are needed to evaluate the activity of these strains and their attributes in biotechnological processes.