Seasonal abundance of lysogenic bacteria in a subtropical estuary

Article Abstract:

The effects of physical, chemical and biological agents on seasonal variations in the number of inducible lysogenic bacteria in a eutrophic estuary were studied. Water samples were analyzed for prophage induction by mitomycin C treatment. Results showed that no prophage induction occurred during the warmer months. In contrast, there was no observed induction during the colder months. These findings suggest that the abundance of inducible lysogenic bacteria occurs as a function of season in an estuarine environment.

Physiological aspects, Bacteria, Water, Aquatic microbiology, Marine bacteria, Estuarine sediments

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New method for evaluation of genotoxicity, based on the use of real-time PCR and lysogenic gram-positive and gram-negative bacteria

Article Abstract:

A new quantitative method is reported for the detection of prophage induction which directly measures the excision of the prophage from the host chromosome. This new method is based on the use of two converging oligonucleotides, corresponding to each side of the a11P sequence of a temperature phage to amplify the intervening DNA segment by real time PCR.

Usage, Polymerase chain reaction, Genetic toxicology

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Milk contamination and resistance to processing conditions determine the fate of Lactococcus lactis bacteriophages in diaries

Article Abstract:

The results of a search for lactococcal phags in a significant number of milk samples obtained from a wide geographical area are reported. Based on the results, a model of how the prevalent phage populations become established in the diary environment is proposed.

Milk contamination, Lactococcus

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