A Case of Pediatric Pertussis Unhesitatingly Diagnosed with the Insight of Microbiology Laboratory.

We describe a pediatric pertussis case occurred in an unvaccinated six-month-old male infant. The newborn patient was rapidly diagnosed by means of the insight of the clinical microbiology laboratory, despite the absence of comments on the suspicion of pertussis. The keen insight of the laboratory lay in noticing the discrepancies between the usual culture results and the gram-stain findings on the respiratory secretion submitted for bacteriological examination with the clinical diagnosis of aspiration pneumonitis. It should be highly stressed that the careful consideration of findings from gram-stained preparations surely guide correct diagnosis.