bovine tuberculosis

tuberculosis /tu·ber·cu·lo·sis/ (-sis) any of the infectious diseases of humans and other animals due to species of Mycobacterium and marked by formation of tubercles and caseous necrosis in tissues of any organ; in humans the lung is the major seat of infection and the usual portal through which infection reaches other organs.

---

avian tuberculosis  a form affecting various birds, due to Mycobacterium avium, which may be communicated to humans and other animals.

bovine tuberculosis  an infection of cattle due to Mycobacterium bovis, transmissible to humans and other animals.

disseminated tuberculosis  an acute form of miliary t.

genital tuberculosis  tuberculosis of the genital tract, e.g., tuberculous endometritis.

tuberculosis of lungs  pulmonary t.

miliary tuberculosis  a form varying in severity, in which minute tubercles form in different organs due to dissemination of bacilli through the body by the blood stream.

open tuberculosis 

1. that in which there are lesions from which tubercle bacilli are discharged out of the body.

2. pulmonary tuberculosis with cavitation.

pulmonary tuberculosis  tuberculosis of lungs; infection of the lungs by Mycobacterium tuberculosis, with tuberculous pneumonia, formation of tuberculous granulation tissue, caseous necrosis, calcification, and cavity formation. Symptoms include weight loss, fatigue, night sweats, purulent sputum, hemoptysis, and chest pain.

renal tuberculosis  renal disease due to Mycobacterium tuberculosis.

spinal tuberculosis  osteitis or caries of vertebrae, usually as a complication of pulmonary tuberculosis.

tuberculosis verruco´sa cu´tis , warty tuberculosis a condition usually due to external inoculation of tubercle bacilli into the skin, with wartlike patches having an inflammatory, erythematous border.

---

bovine tuberculosis

[bō′vīn]

Etymology: L, bos, ox, tuber, swelling; Gk, osis, condition

a form of tuberculosis caused by Mycobacterium tuberculosis that primarily affects cattle but is occasionally found in deer. Mastitis and pulmonary symptoms can occur.

---

tuberculosis

applied generally to diseases caused by tuberculous group of bacteria in the genus Mycobacteria, which includes Mycobacteria tuberculosis, M. bovis and M. avium. See also fish tuberculosis, mycobacteriosis.

---

atypical mycobacterial tuberculosis

see atypical mycobacteriosis.

avian tuberculosis

see Mycobacterium avium tuberculosis (below).

bovine tuberculosis

see Mycobacterium bovis tuberculosis (below).

cutaneous tuberculosis

infection with Mycobacterium tuberculosis uncommonly involves the skin; in dogs and cats it can occur as cutaneous ulcers, abscesses, plaques and nodules. More often, the term is used to describe infection with atypical mycobacteria.

fish tuberculosis

see fish tuberculosis.

Mycobacterium avium tuberculosis

causes a significant disease only in birds. In birds it is a chronic disease characterized by loss of body weight, poor egg production and eventual death. There are characteristic large gray, yellow or white tubercles in liver, spleen and intestinal wall. The disease is very persistent in a flock. In mammals it causes nonprogressive lesions, especially in lymph nodes, causing the animals to be positive to the tuberculin test.

Mycobacterium bovis tuberculosis

a chronic disease characterized by the development of tubercles or discrete nodular lesions in any organ. These may develop a necrotic center containing yellow-orange pus, often caseous. Diffuse involvement of lungs causing bronchopneumonia, and of uterus causing metritis, and of the udder also occur. The common clinical syndrome is wasting with localizing signs dependent on the organs involved. A common lesion in horses is osteomyelitis of a cervical vertebra.

Mycobacterium tuberculosis tuberculosis

infection with the human mycobacteria causes transient, usually lesionless infections in animals.

open tuberculosis

1. that in which there are lesions from which tubercle bacilli are being discharged out of the body.

2. tuberculosis of the lungs with cavitation.

skin tuberculosis

is characterized by chronic indurated lesions on the skin of the lower limbs of cattle. There are nodules on the path of corded lymphatics. Nonpathogenic acid-fast bacteria are present in the lesions and affected cattle are positive to the tuberculin test. Also occurs uncommonly in dogs and cats as single or multiple nodules, ulcers, abscesses or plaques in the skin. See also mycobacteriosis.

tuberculosis testing

tuberculin testing.