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Escherichia coli (1000X). This organism is a coccobacillus commonly associated with the gastointestinal tract of mammals. Some strains of this species are agents of gastroenteritis, urinary tract infections (UTIs), meningitis, and pneumonia. One enterotoxigenic strain, E. coli O157:H7 (the alphanumeric code represents the O cell antigen serotype 157, and the H flagellar antigen serotype 7), is associated with severe and potentially fatal forms of gastroenteritis and UTIs acquired through the consumption of undercooked meats and un- or underpasteurized apple juice.
Salmonella choleraesuis serovar typhimurium (1000X). This rod causes food infections in humans, and has been implicated in outbreaks of gastroenteritis associated with undercooked poultry and poultry products such as eggs. It can also be carried by reptiles such as turtles and iguanas which are kept as pets and spread to foods by improper sanitary practices.
marcescens (1000X). This bacillus is an opportunistic hman pathogen
associated with lower respiratory tract infections. Its most characteristic
feature is the phenotypic expression some strains have to produce the red
pigment prodigiosin when grown at 25-30o C, but not at 37o
C (human body temperature).
vulgaris (1000X). This bacillus is an opportunistic pathogen
associated with urinary tract infections.
aerogenes (1000X). This rod is a common inhabitant of vegetable
matter. In the laboratory, it is often mistaken for E. coli
owing to morphological similarity and its ability to ferment lactose.
However, this species can be separated from E. coli on the basis
of the production of an alkaline intermediate by-product of glucose metabolism,
acetyl methyl carbinol (acetoin) and the utilization of citrate as a carbon
source through a group of tests called the IMViC (I
Red Voges-Proskauer Citrate) series.
rubrum (1000X). This large (0.7-1.0 mm),
nonpathogenic gram negative spirillum exhibits polar amphitrichous flagellation
and a characteristic red pigment.
sicca (1000X). This diplococcus is an inhabitant of the mucus
membranes of mammals. It occurs most frequently in pairs or short
chains, and has a distinct bean-shaped appearence. It is related
to N. gonorrheoea, the pathogen of the sexually transmitted venereal
disease gonorrhoea, and N. meningitidis, the pathogen of bacterial
aeruginosa(1000X). This rod is an inhabitant of soil and plant matter,
but is an opportunistic pathogen of wounds.