Sequence variation among Group III F-specific RNA coliphages from water samples and swine lagoons

Article Abstract:

The genetic diversity among group III F-specific RNA (FRNA) phage strains were isolated from swine lagoons, municipal wastewater and surface waters and studied. A demonstration that nucleotide sequencing of closely related FRNA strains could be used to help trace sources of contamination in surface waters and typing of F-specific RNA (FRNA) coliphages is a useful method for distinguishing human from animal fecal contamination in environmental samples is presented.

Waste Management and Remediation Services, Water Pollution, Causes of, Genetic aspects, Nucleotide sequencing

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Genotypic diversity of Haemophilus parasuis field strains

Article Abstract:

Partial sequences of hsp60 and 16S rRNA genes from 103 strains of Haemophilus parasuis and other related species to obtain a better classification of the strains and the correlation with virulence were analyzed. The analysis of the hsp60 and 16SrRNA gene sequences disclosed the presence of a separate lineage of virulent strains and indicated the occurrence of lateral gene transfer among Haemophilus parasuis and dActinobacillus strains.

Heat shock proteins, Hemophilus infections, Virulence (Microbiology), Chemical properties

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Male-specific coliphages as indicators of thermal inactivation of pathogens in biosolids

Article Abstract:

Male-specific ([F.sup.+]) coliphages were proposed as a candidate indicator of fecal contamination and of virus reduction in waste treatment. It is found that the ([F.sup.+]) DNA coliphage reductions during thermophilic anaerobic digestion were probably related to mechanisms other than thermal inactivation.

Usage, Pathogenic microorganisms, Thermal properties, Sewage sludge, Bacteriophage T4

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