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Mycobacterium bovis is a slow-growing (16- to 20-hour generation time) aerobic bacterium and the causative agent of tuberculosis in cattle (known as bovine TB).It is related to Mycobacterium tuberculosis, the bacterium which causes tuberculosis in humans.
A chart showing the rate of tuberculosis in inspected livestock in a 1938 publication of the United States Department of Agriculture. In the United States, concern about the spread of tuberculosis played a role in the movement to prohibit public spitting except into spittoons .
In cattle, the main signs of paratuberculosis are diarrhea and wasting. Most cases are seen in 2- to 6-year-old animals. The initial signs can be subtle, and may be limited to weight loss, decreased milk production, or roughening of the hair coat. The diarrhea is usually thick, without blood, mucus, or epithelial debris, and may be intermittent.
It is the causative agent of Johne's disease, which affects ruminants such as cattle, and suspected causative agent in human Crohn's disease and rheumatoid arthritis. [2] The type strain is ATCC 19698 (equivalent to CIP 103963 or DSM 44133).
Mycobacterium orygis is similar in morphology to species in the tuberculosis complex of Mycobacterium. It is a non-motile, acid fast bacterium. The cell walls are composed primarily of Mycolic acids. The cells are irregular rods, 0.3–0.5 um in diameter and 2–3 um in length. [1]
Moraxella bovis, the pink eye, a Gram-negative, aerobic, oxidase-positive diplococcus bacterium species implicated in infectious keratoconjunctivitis in cattle; Mycobacterium bovis, a slow-growing, aerobic bacterium species causative of tuberculosis in cattle; Mycoplasma bovis, a bacterium associated with bovine respiratory disease
The Mycobacterium tuberculosis complex (MTC or MTBC) is a genetically related group of Mycobacterium species that can cause tuberculosis in humans or other animals. It includes: Mycobacterium tuberculosis; Mycobacterium africanum; Mycobacterium orygis [1] Mycobacterium bovis and the Bacillus Calmette–Guérin strain; Mycobacterium microti ...
M. tuberculosis is able to reproduce inside the macrophage and will eventually kill the immune cell. The primary site of infection in the lungs, known as the Ghon focus, is generally located in either the upper part of the lower lobe, or the lower part of the upper lobe. [13] Tuberculosis of the lungs may also occur via infection from the blood ...
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