"live microogranisms"

A. tumefaciens is a pathogenic soil bacterium known to cause grown gall disease, in nut trees and the plants of some stone fruits.

This organism is an aerobic organism that is commonly found as part of normal human intestinal flora. It is pathogenic.

Grows on dead tissues. Novobiocin resistant (S. epidermidis and S. aureus novobiocin sensitive). 

Isolated from milk and udders of cows. Lancefield group B, beta hemolysis. Causes infection of the female genital tract, maternal septicemia, neonatal infections. Camp test positive; resistant to bacitracin.

Red-pigmented halophile from evaporating salt ponds; requires 25% salt medium, lyses easily in plain water, releasing DNA.

Lancefield group C, beta hemolysis. Causes strangles in horses. May be pathogenic in humans. Camp test negative; resistant to bacitracin, does not ferment lactose. 

Fascinate students with some of the simplest light-producing organisms

Observe a relationship between two organisms that together produce an effect they could not achieve individually.

Both of these strains of Serratia marcescens are colorless mutants when plated alone, but when grown together, they produce a red pigment.

No Lancefield group shown, alpha hemolysis. Bile solubility test positive, optochin sensitive. Causes pneumonia. 

This organism is often times isolated from food; in large amounts it can cause food poisoning

Isolated from soil. Forms red pigment (best on high carbohydrate medium) and has oval eccentric spores. 

Isolated from sewage, human intestines, and urinary tract infections. Spreading colonies are seen on agar growth medium. 

Lancefield group A, beta hemolysis. Sensitive to bacitracin. Causes strep throat, rheumatic fever, and scarlet fever.

A Common Intestinal Flora Isolate, Demonstrates Alpha Hemolysis on Blood Agar Growth Medium

This organism is commonly isolated from soil or water, and produces a pink or rose colored pigment.