- Microscopically
- Shape
- Stain which they absorb
- Arrangement
singular, pairs, clusters, chains
some have flagella
Escherichia coil - a gram negative, nonspore forming bacillus which ferments lactose at 44°C within 48 hours (see figure 1).
- Macroscopically (grown on artificial media)
- shappe and characteristics of colony
- differential media
Normal Bacterial Flora
- soil, water, animals, birds
Intestinal Normal Flora
- coliform group - total coliforms, fecal coliforms, escherichia coli
- fecal streptococci
- Clostridium
- Pathogenic bacteria spread via the water route
- salmonella - dysentery, typhoid fever, typhoid
- shigella - dysentery
- vibrio cholera - cholera
Opportunistic Pathogens
- pseudomonas, aeromonas, legionella
