482 EXPERIMENT STATION RECORD. 



the occurrence of sarcosporiclia iu au opossum (Didclphis sp), captured at Ancou. 

 Canal Zone. "The fresh sporozoites m saline solution after intramuscular in- 

 oculation into the tissues of a guinea pig took on an atypical development and 

 produced sporozoa not unlike those found by the writer in man (1) and in the 

 guinea pig (2) after feeding with sporozoites from Sarcocystis imiris from 

 the rat." 



Experimental investigations of Streptococcus equi, A. Pricolo {Clin. Vet. 

 [Milan], Sez. 8ci., 32 {1909), Nos. 1, pp. 1-10; 2-3, pp. 96-107; Jt-5, pp. 207- 

 227; 6, pp. 279-284; 33 {1910), No. 1-3, pp. 89-1^3; ahs. in Bui. Inst. Pasteur, 

 8 {1910), No. 8, pp. 3Jf9, 350). — Investigation of the cultural and biological 

 properties of 8. equi are reported in this monograph. 



Transmission of surra, F. S. H. Baldrey (Jour. Trop. Vet. Sci., 5 {1910), 

 No. 4, pp. 595, 596, charts 6). — Trypanosomes were demonstrated in the blood 

 of a pig 5 days after it was inoculated with 2 cc. of blood from a surra pony, 

 remaining present for 5 days. They appeared again 18 days after inoculation 

 and remained for 3 days. The possibility of the pig being a carrier of surra 

 is therefore considered to have been demonstrated and, because of its habits, 

 it is considered a source of danger. Charts of 2 animals are attached showing 

 the course of the disease in the pig and in a test guinea pig. 



Elephant surra. — Trypanosomiasis in the elephant, G. H. Evans and T. 

 Rennie {Jour. Trop. Vet. Sci., 5 {1910), No. 4, pp. 5S5-56cS ) .— The authors 

 record the results of inoculations of a number of laboratory animals with 

 trypanosomes obtained from elephants in the Tamethin district of Burma. 



Note on the passage of a human trypanosoiue through domestic animals, 

 L. E. W. Bevan and M. E. MacGregor {Jour. Compar. Path, and Ther., 23 

 (1910), No. 2, pp. 160-167, fig. 1). — Experiments in which the guinea pig, rabbit, 

 white rat, sheep, and mule were used are reported. 



"In the case of the sheep (a native fat-tail ewe), artificial inoculation gave 

 rise to an infection no less severe than that occurring in sheep under observation 

 at the same time which had been inoculated with the Trypanosoma dimorphon 

 of Northern Rhodesia and the animal trypanosome of the dimorphic type of 

 Southern Rhodesia. Again, the mule offered no resistance to a single inocula- 

 tion with the human trypanosome, which produced a far more severe reaction 

 than the animal trypanosome of Southern Rhodesia — a point of some importance, 

 since that parasite has been held by some to be T. dimorphon, a trypanosome 

 first discovered by Button and Todd in Senegambia and responsible for a serious 

 disease in equines. Indeed, the human trypanosomes in the mule were always 

 far more plentiful and mdre constantly present in the peripheral blood than 

 the animal parasite, which required repeated inoculations to produce infection 

 in mules, horses, and donkeys. Although careful observations in sleeping 

 sickness areas have failed to discover T. ganiMense existing naturally in the 

 blood of domestic animals, further observation appears necessary befoi'e these 

 can be excluded as possible hosts of the human parasite." 



The anatomic principle underlying the tendency of the lungs toward 

 tuberculous disease, C. Hart (Ergeb. Ally. Path. Mensch. u. Tiere, 14 (1910), 

 pt. 1, pp. 337-428). — After giving an extensive review of the literature on this 

 subject, the author states that aside from the actual infection by the tubercle 

 bacillus the prevailing view in regard to the importance of the tendency of the 

 lungs toward tuberculosis is justified. 



An excellent bibliography is appended. 



The frequency, origin, and channels of infection of tuberculosis m man, 

 H. Beitzke (Ergel). Allg. Path. Mensch. u. Tiere, 14 (1910), pt. 1, pp. 169- 

 336). — This is an extensive review of the work done and views expressed in 



