Medical research.

Abstract

Bacilli of the paratyphoid-enteritidis group have been encountered by many observers in certain types of guinea-pig disease. Some evidence has been advanced that the bacillary infection may be secondary to an infection by a filterable virus (Petrie and O'Brien). Such infections occur rather frequently in epidemic proportions with a very high mortality. The infected pigs develop pseudo-tuberculous lesions (Smith and Stewart), or the female pigs may develop septic endometritis (Carter). With or without these lesions, the dying pigs develop a septicamia. In some instances, the organism isolated has been identified as B. enteritidis (Gartner), being culturally identical with this type and agglutinating to the titre of enteritidis serum. More commonly, however, the bacillus isolated has been a paratyphoid type. Wherry studied a' commercial ratticide prepared from this bacillus and gave the bacillus the name, B. cholerce cavice. On the recommendation of Smith he changed this to B. pestis cavie. Although the studies on the paratyphoid type thus