The bacteriological investigations of the last decade have shown that the Eberth-Gaffky bacillus is not the only organism which causes a general infection with fever, roseolar eruption, enlarged spleen, diarrhea, tympanites and abdominal tenderness. Other bacteria, namely, paratyphoid bacilli and general infection with the Bacillus coli communis, give rise to clinical manifestations difficult, if not impossible, to differentiate from true typhus abdominalis.Paratyphoid fever has come to be important, because it has been found to prevail wherever typhoid fever occurs. Epidemics of general infection by the Bacillus coli communis1 are very rare; only one has been recorded. Paratyphoid fever is an acute infectious disease, running a clinical course which resembles typhoid fever in some cases; in others it is chiefly characterized by a diarrhea resembling cholera nostras. The mode of the infection is the same as in typhoid fever, but food infection plays a more
PROESCHER F, RODDY JA. BACTERIOLOGICAL STUDIES ON PARATYPHOID A AND PARATYPHOID B. Arch Intern Med (Chic). 1910;V(3):263–312. doi:10.1001/archinte.1910.00050250048005
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