19191 VI TI.KIXAKY MEDICINE. 683 



.\ detailed report of studies <>r the biology of this « i«-i< . by Booker, Blshopp, 

 and Wood, has been previously noted (E. s. R., "jt, p. 865). 



Parasitic mange (Vet. Rev., .'. (1918), No. J. pp. /'>'.' \66). This ig a review 

 of the more recenl literature <>n the subject. Bee also a previous note 

 ( K. s. i;.. 39, p. 883). 



Report of an experiment on hog cholera. L. L. Lewis and C. H. M< Blbov 

 (Oklahoma sin. Rpt. /.')/s'. pp. 51, 58). To determine the length of time tiiiit 

 blood will retain its virulence when Injected Into hogs for the purpose of 

 byperlmmunizlng them mlti inst cholera, two tests wen- made, one In which 

 the blood was drawn from the hyperimmune bogs 18 boura and the other 24 

 hours after hyperlmmunlzatlon. For each test four healthy hoga were In- 

 Jected wiiii from 5 to 'J» cc. of the blood and wore placed under observation 

 for aboul SO days, al the end of which time each of the elghl hogs used was 

 given 0.5 cc. of bog cholera virus. This wms followed :it Intervals of a row 

 days by Increasing doses of the virus ap to 5 cc. ;it the end of a month. 



In only one case of the hOgS used was there any clinical evidence of in- 

 fection and this was of a very lighl type, thus indicating that the virulence of 

 Mood used in hyperiininunization is lost in from IS to 24 days and possibly 

 in less time. 



The authors are of the opinion that the immunity received by these hogs 

 should he attributed to the attenuation of the virus in the hyperiinmunized 

 hogs and not to an antitoxin. 



A new disease of pigs. — Pyemia due to the Bridre-Sivori bacillus, V. 

 Sivoui and A. <\ Mabchisotti (Rev. Soc. Med. Vet. [Buenos Aires], •>' (1918), 

 No. 8, pp. .!','.> -..'77. figs. 10; abs. in Vet. Rev.] 2 (1918), No. ■',. pp. .',-',.>. ',.:.',).— 

 This is a discussion of an enzootic affection of suckling pigs (one to four 

 months' old) which occurs during the spring and summer in the Provinces of 

 Buenos Aires and Cordoba, Argentina. A high percentage of the animals is 

 affected, one breeder having lost r><><> of a herd of too pigs in the course of 

 three months. 



Swellings of various sizes first appear in different parts of the body, accom- 

 panied by persistent lameness. Sometimes there is slight paraplegia, or loss 

 of locomotory power, with incoordination ami a swaying gait. This may be- 

 come so pronounced that the animal can not keep its feet and in such cases a 

 fatal termination is very frequent. In other cases the respiratory Bystem is 

 affected, with dyspnoea, cough, and symptoms of suffocation appearing, gener- 

 aliy in the later stages of the disease. There is a progressive and rapid emacia- 

 tion, which iii a short time assumes a grave character. 



"On post-mortem examination the authors found abscesses, varying in size, in 

 different parts of the body, containing a yellowish-tureen, thick, inodorous pus. 

 The abscesses were circumscribed by a dense, whitish tihrous capsule from a 

 few millimeters to 2 to -I cm. [0.8, to 1.0 in. | in thickness. Joints contained the 

 same kind of pus. and were surrounded by an abundant formation of fibrous 

 tissues in which were purulent or caseous masses, either Independent or two 

 OT three joined by fistulous tracts. In one case there were abscesses in tin- 

 frontal and parotidean regions, a very marked and generalized congestion of 

 the lymph glands was observed." 



The tinctorial and cultural Characteristics of the organism isolated from 

 abscesses are described by the authors who identify it with the organism 

 described by Pacella and Cortelezzi ' as the causal agent of caseous abscesses 

 in bovines, the Bridrg-Sivori bacillus. 



»EeT. Facult. Agron. y Vet., 2, sor., 8 (1911). pp. 99-112. 



