SALMONELLA INFANTIS. SALMONELLA INFANTIS This scanning electron micrograph (SEM) depicts a number of rod-shaped, motile, Gram-negative Salmonella infantis bacteria, Magnification 2255x. Clinical features of ´Salmonellosis´ include fever, abdominal cramps, and diarrhea, which is sometimes bloody. Occasionally these bacteria can establish a localized infection such as septic arthritis, or can even progress to sepsis, which occurs due to the systemic spread of these pathogens. The etiologic age