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    Home»Food»Genera of Bacteria Important in Foods
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    Genera of Bacteria Important in Foods

    AlbertBy AlbertMarch 12, 2021Updated:February 5, 2022No Comments3 Mins Read
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    Acetobacter. Ellipsoid to rod-shaped (0.6 × 4 μm); occur singly or in short chains; motile or nonmotile; aerobes; oxidize ethanol to acetic acid; mesophiles. Cause souring of alcoholic beverages and fruit juices and used to produce vinegar (acetic acid).

    Can also spoil some fruits (rot). Widely distributed in plants and in places where alcohol fermentation occurs. Important species: Acetobacter aceti. Acinetobacter. Rods (1 × 2 μm); occur in pairs or small chains; show twitching motility because of the presence of polar fimbriae; strictly aerobic and grow between 20°C and 35°C. Found in soil, water, and sewage. Important species: Acinetobacter calcoaceticus. Alcaligenes. Rods or coccobacilli (0.5 × 1 μm); motile; present in water, soil, or fecal material; mesophiles. Cause spoilage of protein-rich foods. Species: Alcaligenes faecalis. Alteromonas. Most currently assigned Alteromonas species are of marine origin and might be present in foods of marine origin.

    Need 100 mM NaCl for optimum growth (unlike Pseudomonas). Because Alteromonas putrefacience (species reclassified as Shewanella putrefaciens) has many characters similar to those of Pseudomonas, it was previously designated as Pseudomonas putrefacience. Strains important in fish and meat spoilage. Psychrotrophs. Brucella. Coccobacilli (0.5 × 1.0 μm); mostly single; nonmotile. Different species cause disease in animals, including cattle, pigs, and sheep. They are also human pathogens and have been implicated in foodborne brucellosis. Brucella abortus causes abortion in cows.

    Campylobacter. Two species, Campylobacter jejuni and Cam. coli, are foodborne pathogens. Small (0.2 × 1 μm) microaerophilic, helical, motile cells found in the intestinal tract of humans, animals, and birds. Mesophiles. Flavobacterium. Rods with parallel sides (0.5 × 3 μm); nonmotile; colonies colored; some species psychrotrophic. Cause spoilage of milk, meat, and other protein foods. Species: Flavobacterium aquatile. Gluconobacter.

    Many characteristics of this group are similar to those of Acetobacter. Gluconobacter oxydans causes spoilage of pineapples, apples, and pears (rot). Moraxella. Very short rods, frequently approaching coccoid shape (1 × 1.5 μm); occur singly, in pairs or short chains; may be capsulated; twitching motility may be present in some cells; optimum growth at 30°C–35°C. Found in the mucous membrane of animals and humans. Important species:

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    Moraxella lacunata. Pseudomonas. Straight or curved (0.5 × 5 μm); aerobes; motile rods; psychrotrophs (grow at low temperatures). Found widely in the environment. This genus includes large numbers of species. Some important species in foods are Pseudomonas fluorescens, Pse. aeruginosa, and Pse. putida. Important spoilage bacteria, can metabolize a wide variety of carbohydrates, proteins, and lipids in foods

    Visit here to know about the newsfie where you can get the most trending latest news posthut. By the way, this copyblogger site also analysis the recent headline news around the world.

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