Light Micrograph (LM) of Pseudomonas aeruginosa. Note the histopathologic changes in a case of botryomycosis due to Pseudomonas aeruginosa using a Brown-Brenn stain. Micrograph was taken from a draining lesion of the lower abdomen. Botryomycosis in humans is usually localized to the skin but, as seen here, may involve other organs such as the abdominal viscera. Pseudomonas aeruginosa is a common gram-negative, rod-shaped bacterium that can cause disease in plants and animals, including humans. A species of considerable medical importance, P. aeruginosa is a multidrug resistant pathogen recognised for its ubiquity, its intrinsically advanced antibiotic resistance mechanisms, and its association with serious illnesses, hospital-acquired infections such as ventilator-associated pneumonia and various sepsis syndromes. The organism is considered opportunistic insofar as serious infection often occurs during existing diseases or conditions. | |
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