782 EXPERIMENT STATION RECORD. [Vol. .'^.7 



tion, therefore, has not been verified by our results. With milk containing 

 Andrade indicator somewhat sharper differences are obtained with most of 

 the strains, although the general quantitative character of the reaction is 

 preserved. This is probably due to the greater delicacy of this indicator and 

 coincident reduction of the color. Some strains, however, react irregularly 

 on this medium, as on litmus milk, and show its lack of value as a qualitative 

 method of differentiation." 



Antitetanic serum in articular rheumatism, W. H. Dalbympu; (Amer. Jour. 

 Vet. Med., 12 {1917), No. 8, pp. 552, 553; Jour. Amer. Vet. Med. Assoc, 51 

 (1917), No. 5, pp. 6U2-694). — Tiie author, at the Louisiana Experiment Stations, 

 reports the successful use of antitetanic serum in a ca.se of articular rheuma- 

 tism in a jack. Three doses of 500 units each were injected with apparent 

 complete cure. 



The vitality of the tubercle bacillus outside the body, M. B. Sopabkab 

 (Indian Jour. Med. Research, 4 (1917), No. 4. pp. 627-650) .—The vitality of the 

 tubercle bacillus was studied under varying external conditions. 



The bacilli in the sputum when expo.sed to direct sunlight remained alive 

 for six hours, but were killed after eight hours' expc^^ure. On exposure t" 

 diffused daylight the organisms remained alive for six days, but were dead 

 after expo.sure for eight days. Tubercle bacilli were kept alive and virulent 

 for 309 days in sputum which was kept in darkness, even when it was com- 

 pletely desiccated. Living tubercle bacilli were isolated from decomposing 

 sputum after 20 days, but not after 26 days. The bovine type was found to 

 be more resistant to sunlight and diffu.sed daylight than the human type. When 

 expo.sed to electric light the bovine bacilli were found alive after 74 days, but 

 were dead after KX) days. From three to four hours' exposure in «lirect sun- 

 light and from three to four days in diffused daylight were found ne<es.sary 

 for sputum to become sudlciently dried to bo capable of being reduced to dust. 



Incidence of bovine infection of tuberculosis in children, Chino Yik Wanq 

 (Edinb. Med. Jour., 18 (1917), pp. 178-196: abs. in Abs. Bact., 1 (1917), No. S, 

 pp. 266. 267). — Of 281 ca.ses of tuberculosis examine<l in Edinburgh the bovine 

 type of tubercle bacillus was i.solated from 78.4 per cent of cases under 5 years 

 of age, from lO.'.i per cent of cases between the ages of 5 and 16 years, and from 

 only 7.8 per cent of patienls over 16 years. The bovine bacillus was found 

 in 6 of children who dio<l of tuberculous meningitis and abdominal tubercu- 

 losis. The tuberculin test yielded positive results in 37.5 per cent of children 

 fed on raw milk and in only 15.4 ix^r cent of children fed on boiled milk. 



The etiology of hog cholera. — Second report, F. Proksiher and H. A. Seil 

 (Jour. Amer. Vet. Med. Assoc., 51 (1917), No. 5, pp. 609-624, figs. i5).— Contin- 

 uing the study previously noted (E. S. R., 37, p. 382), data are reported which 

 deal mainly with the blood changes, continued studies on the staining prop 

 erties of the virus, microscopical changes in the organs, and the cultivation of 

 the organism. 



The blood changes in hog cholera were investigated with 12 pigs. Tabular 

 data showing the ab.'jolute leucocyte count and the differential count, before and 

 after incubation, are submitted. It is noto<l that the blood counts can not be 

 regarded as conclusive on account of their iucompletenes.s. The data obtained, 

 however, show that in hog cholera there Is at first a decrease in the absolute 

 leucocyte count. In some of the animals a leucopenia was observed. 



Shortly before death there njay be a considerable increase in leucocytes. " In 

 the majority of the cases the differential count showed a decided increase in 

 the polynuclear neutrophils, with a decrease in the lymphocytes. The polynu- 

 clear eosiiioi>hiIs and basophils are greatly dimiuished in number or disap- 

 pear entirely. N'eutrophil myelocytes and plasma cells may appear shortly 



