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Review: What type of microscopy is this? - page 10 / 42

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Culturing Bacteria Pathogens

Salmonella, Shigella, Campylobacters and Vibrios:  culture methods little changed beyond efforts to improve recoveries using modified pre-enrichment and enrichment broths and differential and selective agars

For some other bacterial pathogens:

e.g., enterohemorrhagic strains of Escherichia coli (O157:H7): culturing from water a challenge; many other, non-pathogenic strains of E. coli.

select for their growth based on distinctive biochemical or other properties to facilitate separation from the other, non-target strains

e.g., sorbitol-MacConkey Agar for E. coli O157:H7

Most E. coli ferment D-sorbitol; most E. coli O157:H7 do not;

Sorbitol-negative E. coli O157:H7 colonies are colorless

Non-O157:H7 colonies are pink.

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