Libman. on the Bacteriologic Study of a Case of Paracolon Infection Probably Secondary to Typhoid Fever, with Remarks on Serum Reactions in Paracolon Infections and on the Thread

The subject of infections by members of the group of organisms intermediate to the typhoid bacillus and the typical colon bacillus of Escherich -the so-called paracolon bacilliis one of ever-increasing interest. The name "paracolon " was first applied to the group by Gilbert,' who described five types of paracolon bacilli. He found members of this group present in the intestinal canal of man and many animals. The first important cases t of infection by such organisms were described by Achard and Bensaude2 in I896, under the title of " Paratyphoid Infections." Their cases were as follows: Case L A case clinically resembling typhoid fever with an intercurrent relapse followed by a femoral phlebitis. During the course of the patient's illness the writers twice isolated from the urine, which had become purulent, a so-called paratyphoid bacillus which was identical with the one found in the second case. A blood culture made during the height of the fever proved negative. Aspiration of the spleen revealed staphylococci only. The stools contained only the usual forms of colon bacilli, typhoid bacilli being absent. The patient recovered after an illness lasting six weeks. During the course of the disease the authors obtained a positive serum reaction with the paratyphoid bacillus and with