Gram Positive Asporogenous Rod Shaped Bacteria

Bacterial Taxonomy
Bacterial Taxonomy Part 1
Characters of Family Peptococcaceae
Characters of Family Bacillaceae
Features of Coryneform Group of Bacteria
Major Constituents of Cell Wall Types of Actinomycetes
Groups of ctinomycetes Based on Whole Cell Sugar Pattern and Cell Wall Type
Nonlegume Nodule Bearing Plants with Frankia as Endophyte
Endospore Forming Rods and Cocci
Gram Positive, Asporogenous Rod-Shaped Bacteria

Gram Positive Asporogenous Rod Shaped Bacteria

	Tabular Form of Bacterial Classification From David Bergey's Manual This part includes the family Lactobacillaceae with one genus Lactobacillus and three other genera of uncertain affiliation namely Listeria, Erysipelothrix and Caryophanon. Organisms in the family Lactobacillaceae are straight or curved rods occurring singly or in chains and generally are non motile. Anaerobic or facultatively anaerobic, highly fermentative with complex nutritional requirements.
Some produce lactate from carbohydrates but do not utilize lactate anaerobically. Rarely pathogenic. Found in fermenting animal and plant products rich in carbohydrates and in mouth, urogenital tracts and the intestinal tract of various warm blooded animals The members of the genus Lactobacillus are aciduric with an optimum pH less than 5.8 and temperature range of 5-53°C. G + C content of DNA varies from 34.7-53.4 moles per cent. The genus is further classified based on the end products from glucose metabolism and other biochemical characteristics.
The genus Listeria has bacteria which has cells that are small, coccoid or rods with a tendency to form chains of 3-5 or more cells. Sometimes elongated filamentous forms are also seen. They do not form capsules and are motile by peritrichous flagella when grown at 20 to 25°C. Aerobic to microaerophilic and growth occurs between 4 to 38°C. Found in the faeces of animals and man or in silage. Some parasitic on warm blooded animals. G +C content of DNA varies between 38-56 moles per cent.
The genus erysipelothrix includes rod shaped bacteria with a tendency to form long filaments. The filaments may also thicken and show characteristic granules. Non motile, neither capsules nor spores are produced. Gram positive but older cultures tend to become Gram negative. Aerobic but grow better in an atmosphere with reduced oxygen. Optimum growth temperature ranges from 16-41°C. Parasitic on mammals, birds and fish.
	The genus Caryophanon has one species C. latum and consists of cells with large rods or filaments upto 3 µm in diameter, divide by closely spaced cross walls into numerous disc-shaped cells which are less than 1 µm long. Motile by lateral flagella, chemoorgantrophs and strict aerobes. Growth occurs at 10-37°C and pH 6-8. Originally, this organism was isolated from cow dung.

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