Medical Dictionary
Prototheca
noun Pro·to·the·ca \ˌprōt-ə-ˈthē-kə\
Medical Definition of PROTOTHECA
: a genus of unicellular algae that resemble algae of the genus Chlorella but lack chlorophyll and that include two (P. zopfii and P. wickerhamii) that cause mastitis in cows and sometimes localized infection (as of the skin) in humans
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