The
predominant aerobic bacterial flora of the large intestine of human beings and
animals is composed of non-sporing, non-acid fast, Gram negative bacilli.
Members of this group are included in a complex family, Enterobacteriaceae.
Some are capsulated, some not, some are motile and some non-motile. They are
oxidase negative and catalase positive and reduce nitrates to nitrites, aerobes
and facultative anaerobes, grow readily on ordinary media, MacConkey agar and
ferment glucose in peptone water with the production of either acid or acid and
gas. The property of lactose fermentation is of great importance for the
isolation and identification of enterobacteria from clinical specimens.
Showing posts with label Klebsiella. Show all posts
Showing posts with label Klebsiella. Show all posts
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Rhabdoviruses
The family Rhabdoviridae comprises more than 200 viruses which infect mammals, reptiles, birds, fishes, insects and plants. It has two ge...
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The family Micrococcaceae is composed of three genera : Micrococcus , Planococcus and Staphylococcus . They are catalase positive, gram p...
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The family Rhabdoviridae comprises more than 200 viruses which infect mammals, reptiles, birds, fishes, insects and plants. It has two ge...
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1. Listeria monocytogenes It is a small, coccoid, gram positive bacillus, measuring 1-3 m m in length and 0.5 m m width, with a tend...