 Record down the contamination type to look for trends. Try doing a gram stain:Gram negative rods are likely to be water bourne pathogens, indicating a water-bath issue (or could be E.coli, which indicates bad aseptic technique, or if someone has food poisoning). Gram positive rods or cocci may be environmental pathogens and therefore could have originated from clumsy handling. Gram negative cocci include respiratory symptoms, meningitis, and sexually transmitted disease... Yikes!
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