The genus Brucella consist of small, non-motile, aerobic, Gram-Negative, Cocco-bacilli and grow poorly on ordinary media. They are strict intracellular parasites of domesticated animals (Goats, Sheep,Cattel, Buffaloes, Pigs) and may also infect humans.
Brucellosis is a zoonotic infection transmitted to humans contact with fluids from infected animals (sheep, cattle, goats, pigs, or other animals) derived food products such as unpasteurized milk and cheese . The disease is rarely, if ever, transmitted between humans.
Brucellosis, also called Bang's disease, Crimean fever, Malta fever, Maltese fever, Mediterranean fever, rock fever, or undulant fever, is a highly contagious zoonosis caused by ingestion of unsterilized milk or meat from infected animals or close contact with their secretions.
HISTORY
In 1887, Davit Bruce (surgeon,Military Doctor) isolated microoranism (micrococcus melitensis) from spleens of fetal cases of British soldiers at Malta.
Brucella melitensis( malta fever) in honor of
Bruce
In 1905, Zammit ( Maltese Bacteriologist) ; demonastred B.melitensis carry in goats milk and transmitted to man by goat raw milk
In 1897, Bang
discovered B.abortusin copenhagen- cottel
In 1814,
Tratum, isolate B. suis from feotus of a
pig in
USA.
B. neotomae-
Desert rodents
B. ovis
-rams
B. canis
– dog
B. maris – dolphin ( marine mammals- unrecognise brucella spp in 1994)
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