A mixed culture recovery method indicates that enteric bacteria do not enter the viable but nonculturable state

Article Abstract:

The mixed culture recovery method, which involves the mixing of two easily identifiable strains so that large numbers of nonculturable cells of both strains are present along with a small number of culturable cells of only one strain, is presented. The technique was developed for determining whether only culturable cells, or both culturable and nonculturable cells, have responded to resuscitation techniques. Results of experiments with various strains of enteric bacteria indicate that the apparent resuscitation of cells of the culturable strain was due only to the growth of the remaining culturable cells.

Methods, Enterobacteriaceae, Cultures (Biology), Cell culture, Tissue culture

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Copper-resistant enteric bacteria from United Kingdom and Australian piggeries

Article Abstract:

Closely-related resistance determinants in non-identical plasmids cause copper resistance in enteric bacteria, which were isolated at separate geographic locations. Thirty-three enteric isolates from Australia (Escherichia coli) and the UK (Salmonella sp., Citrobacter spp., and Escherichia coli) piggeries were identified with respect to the copper resistance, and it was found that the copper resistance phenotypes of four new Australian Escherichia coli isolates were comparable to Escherichia coli K-12 strain ED8739.

Bacteria, Copper, Copper (Nutrient), Bioavailability

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Long-term shifts in patterns of antibiotic resistance in enteric bacteria

Article Abstract:

About one-fifth of E. coli and Salmonella enterica strains are resistant to at least one antibiotic. Analysis of enteric bacterial cultures taken before the introduction of antibiotics shows that all were susceptible to antibiotics.

History, Drug resistance in microorganisms, Microbial drug resistance

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