This section is from the book "A Manual Of Pathology", by Guthrie McConnell. Also available from Amazon: A Manual Of Pathology.
Paratyphoid Fever presents lesions that differ somewhat from typhoid. There are not the characteristic intestinal changes. The clinical appearance may be similar, but there may be no ulcerations present in the intestine or else the ulcers may be very irregular and not typical. Two strains of organisms very closely related to each other, but differing in certain respects in their cultural characteristics from the typhoid bacillus, have been isolated.