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1/5. capnocytophaga canimorsus peritonitis in a pediatric peritoneal dialysis patient.

    capnocytophaga canimorsus, a bacterium rarely encountered by clinicians, was responsible for the development of peritonitis in an 18-year-old white male on automated peritoneal dialysis following the puncture of his dialysis tubing by a domestic cat. Although more than 100 cases of septicemia caused by C. canimorsus have been reported, this is the first report of the organism causing peritonitis in a patient receiving peritoneal dialysis. Of interest, the patient had a prior episode of peritonitis secondary to pasteurella multocida, also following transmission from the same cat.
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2/5. meningitis due to Aeromonas species: case report and review.

    In recent years, Aeromonas species has been reported to cause extraintestinal infections with a growing frequency. meningitis due to Aeromonas species is, however, a rare entity. We report a case of aeromonas meningitis in a 54-year-old man with a history of chronic alcoholic liver disease who, after an episode of gastroenteritis, developed an acute clinical picture characteristic of meningitis with septic shock and ecthyma gangrenosum. Aeromonas veronii (biogroup sobria) was isolated from cultures of blood as well as from cultures of stool, peritoneal fluid, skin lesion, and CSF specimens (obtained by lumbar puncture). Our review of seven additional cases of aeromonas meningitis in the world literature revealed that this condition is generally secondary to metastatic dissemination from primary bacteremia. Aeromonas meningitis, which may or may not be preceded by gastroenteritis, presents clinically as bacterial meningitis, although the presence of skin lesions may increase suspicion of the diagnosis. Third-generation cephalosporins are probably the therapy of choice for patients with aeromonas meningitis.
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3/5. aeromonas hydrophila--its implications in freshwater injuries.

    lacerations or puncture wounds sustained in freshwater environments are susceptible to contamination by aeromonas hydrophila. Numerous cases have been reported of cellulitis secondary to water-related injuries requiring hospitalization where A. hydrophila was the isolated organism. The typical presentation of an infection of A. hydrophila mimics a streptococcal soft tissue infection, which may result in delay in administration of appropriate antibiotics. A case is presented of a nonimmunocompromised patient who developed an A. hydrophila infection following freshwater-related injuries.
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4/5. A pseudoepidemic of alcaligenes xylosoxidans attributable to contaminated saline.

    alcaligenes xylosoxidans is an uncommon but serious cause of nosocomial epidemics. This report describes a cluster of two patients who underwent revision of hip arthroplasties and one patient who had a lumbar puncture. Cultures obtained during all three procedures showed A. xylosoxidans with similar antibiotic sensitivity patterns. An investigation found that saline used to process these specimens was contaminated with this organism.
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5/5. Septic arthritis of the knee caused by edwardsiella tarda after a catfish puncture wound.

    Anglers are wary of catfish as their sharp fin spines may cause injury and, in some species, envenomation. We describe another complication of catfish spine injury--septic arthritis caused by edwardsiella tarda. We believe this is the first report of this organism causing septic arthritis.
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