In September of 2004, we investigated 7 cases of post-myelography meningitis. Streptococcal species were recovered from blood or cerebrospinal fluid in all cases. Our findings suggest that droplet transmission of the oral flora of the clinician performing the procedure was the most likely source of these infections. The Centers for Disease Control and Prevention recommends the use of face masks by those performing myelograms.
A cluster of cerebrospinal fluid Gram's stains showing gram-positive bacilli and of cerebrospinal fluid cultures growing Bacillus species in a large community teaching hospital prompted an epidemiologic and microbiologic investigation. Pseudomeningitis was suspected and confirmed when cultures of uninoculated commercial trypticase soy broth with 5% Fildes enrichment grew Bacillus species. Secondary contamination of the pipettes used for inoculation accounted for the positive cerebrospinal fluid Gram's stains. The costs of this pseudo-outbreak included unnecessary antibiotic therapy, lumbar punctures, and hospitalization. Such adverse effects can be minimized by increased physician awareness of pseudoinfections and by prompt investigation of such occurrences.
A cluster of cerebrospinal fluid Gram's stains showing gram-positive bacilli and of cerebrospinal fluid cultures growing Bacillus species in a large community teaching hospital prompted an epidemiologic and microbiologic investigation. Pseudomeningitis was suspected and confirmed when cultures of uninoculated commercial trypticase soy broth with 5% Fildes enrichment grew Bacillus species. Secondary contamination of the pipettes used for inoculation accounted for the positive cerebrospinal fluid Gram's stains. The costs of this pseudo-outbreak included unnecessary antibiotic therapy, lumbar punctures, and hospitalization. Such adverse effects can be minimized by increased physician awareness of pseudoinfections and by prompt investigation of such occurrences.
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