222 Manual of Veterinary Microbiology. 



muscular counective tissue, bones, bone marrow, and 

 the articulations. The disease is especially frequent 

 in adult animals; when it exists in the calf it is lo- 

 cated nearly always in the abdominal viscera, and 

 more especially in the liver when the afieetion is con- 

 genital ; but it can quickly extend to the thoracic or- 

 gans. We have had the opportunity of establishing 

 this extension to an excessive degree in the viscera 

 coming from the abattoir of Brussels, the lungs and 

 bronchial glands showing a generalization of miliary 

 tubercles. In two cases of intra-uterine infection ob- 

 served by MM. Malvoz and Brouwier the lung was 

 exempt from lesions, these occupying the liver, hepatic, 

 and bronchial glands. 



The pig, although very susceptible to the experi- 

 mental disease, appears to be rarely affected with tu- 

 berculosis; here it is the pulmonary form that pre- 

 dominates. M. Moule has communicated a case in 

 which he observed extension to the pleura, ribs, and 

 muscles. Microscopical and bacteriological researches 

 have enabled us to connect with tuberculosis those 

 scrofulous alterations of the cervical glands which are 

 occasionally observed in the pig. According to M. 

 N'ocard, the disease in this species often develops with 

 great rapidity and passes unperceived ; in the chronic 

 forms the bacilli are rare and seem to have lost part 

 of their virulence ; inoculated to guinea pigs they pro- 

 duce a disease of slow course ; but the period of in- 

 cubation becomes shortened again when these bacilli 

 are inoculated from the lirst guinea pig to others in 

 series. This property belongs also to the lesions of 

 human scrofula. 



In the horse two forms of tuberculosis exist ; the 



