VETERINARY MEDICINE. 383 



Atelectasis of the lungs and its relation to swine plague, Simadkr (Ber- 

 lin. Ticriirztl. ]Vc]inf<chr.. JDOG, No. 2). /;/;. //.)J-//.JO, fig. 1). — A careful study was 

 niado of the occ-urrenoe of atelectasis in the kings of swine and other animals 

 for the purpose of detennining the conditions under which this phenomenon ap- 

 pears and its jwssihle relation to the development of swine phigug^ 



The author finiiid that atelectasis appears in various forms, some of them he- 

 ing congenital and others appearing later. Atelectasis occurs frequently in all 

 animals used for food and is usually of congenital origin. The history of cases 

 of atelectasis varies greatly. The solid portions of the lungs thus affected may 

 become expanded by violent inspiration of air, and a normal condition may 

 thus be brought about. Otherwise the affected part may show a pronounced 

 atrophy in the course of time. 



The author believes that atelectasis has absolutely nothing to do with swine 

 plague except in so far as the bacilli of swine plague may find a more favor- 

 able place for growtli in tlie atelectatic parts of the Iniigs. 



Notes on the etiology of swine plague, A. Stadie {Zischr. Iiifectionfikranlc. 

 ti. Hi/g. Ilaiistirre, 1 (J 906), No. -J-J, pp. i]7C)-381). — According to the author's ex- 

 periments, the filtered fluid obtained from the lungs of hogs affected with swine 

 plague exercises no specific effect. In a number of experiments, during which 

 pigs were artificially inoculated with Bacillus pyogenes snis, it was found that 

 the disease thus produced was not readily transmitted from one animal to 

 another. In fact, no such transmission took place during tbe period of 3 weeks 

 in which inoculated and healthy animals were kept in close contact. 



Immunization toward hog cholera by the aid of bacterial extracts, J. 

 Citron (Ztschr. II gg. ii. IiifcctioiiskraiiJ:., 53 (1006), No. 3, pp. 515-533). — In a 

 long series of experiments carried on by the author it appeared that immunity 

 produced by aggressins and bacterial extracts is of practically the same nature 

 and duration. Aggressins and bacterial extracts appear to be serviceable under 

 the same conditions and likewise fail at the same points. It is shown con- 

 clusively that the immunization produced by this method is due to bacterial 

 extracts and not to the bacterial bodies themselves. This point was demon- 

 strated by positi\e results with the use of extracts and by negative results from 

 the use of bacterial bodies after the extracts had been removed. The author be- 

 lieves, however, that innnunization against hog cholera by means of aggressins 

 or bacterial extracts is very unreliable as compared with results obtained by 

 vaccination with mouse typhoid. 



Active and passive immunization toward hog cholera, M. Prettneb 

 (Ztschr. Infrktitniskrank. ii. Ilgg. Ilaiistirrc, 1 (I'JiHi), No. 6, pp. Ji51-474). — In 

 an extensive series of experiments with mice, rabbits, guinea pigs, and swine it 

 was found possible to produce a high degree of active immunity by the use of 

 exudates free from the bacillus of hog cholera. Serum obtained from actively 

 immunized animals may be depended upon to produce a fair degi-ee of passive 

 inunnnity when injected into other animals. 



Feeding experiments with feces containing trichinae, II. M. Hoyberg 

 (Cciithl. Hakl. [cic], 1. Aht.. Orig.. J, I (J<)OU), No. 2, pp. 210, 211).— 'Vha com- 

 monly accepted statement regarding the transmission of trichinji} is that infec- 

 tion takes place only after taking muscle tricbin;^ into the stomach and that 

 intestinal trichina' brought in contact with the digestive juices of anotber 

 animal ai'e destroyed. The author infected a number of brown rats by feeding 

 them trichinous pork .ind subsequently used the intestinal contents of these 

 infested rats in feeding otlier rats. As a result of these experiments 4 out of f) 

 rats became infected and it appears, therefore, that intestinal trichina* may be 

 in a position to infect other animals without having previously passed a period 



