Biocidal activity of formaldehyde and nonformaldehyde biocides toward Mycobacterium immunogenum and Pseudomonas fluorescens in pure and mixed suspensions in synthetic metalworking fluid and saline

Article Abstract:

The potential effectiveness of the commonly used commercial formaldehyde (HCHO) and nonformaldehyde (non-HCHO) biocides in metalworking fluids against two widely recognized bacterial genera of occupational health concern, Mycobacterium and Pseudomonas, is investigated. The results indicate that Mycobacterium immunogenum is more resistant than Pseudomonas fluorescens to the tested formaldehyde-releasing biocides and phenolic biocide.

Pseudomonas, Bacterial genetics

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Diversity of nontuberculoid mycobacterium species in biofilms of urban and semiurban drinking water distribution systems

Article Abstract:

Various nontuberculous mycobacteria (NTM) are isolated from biofilms in drinking water distribution systems in two urban and two semiurban areas in South Africa. The results reveal that most of the isolates belonged to opportunistic pathogenic species of the NTM group and none of them belonged to the Mycobacterium avium complex.

South Africa, Microbial mats, Drinking water

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