Melissococcus
{{Short description|Genus of bacteria}}
{{Automatic taxobox
| image =
| taxon = Melissococcus
| authority = (ex White, 1912)
Bailey and Collins, 1983
| subdivision_ranks = Species[https://lpsn.dsmz.de/genus/melissococcus LPSN entry for Melissococcus]
| subdivision = * M. plutonius[https://lpsn.dsmz.de/genus/melissococcus LPSN entry for Melissococcus]
}}
Melissococcus is a genus of Gram-positive, catalase-negative, coccus-shaped lactic acid bacteria within the family Enterococcaceae. Melissococcus species were classified as Streptococcus until 1983 when Melissococcus was recognized as a distinct genus.{{Cite journal|title=Taxonomy of the species Melissococcus pluton (sic) (ex White 1912) Bailey and Collins 1983 and Melissococcus plutonius corrig. (ex White 1912) Bailey and Collins 1983|year=2016|language=en|doi=10.1601/tx.5558|last1=Parker|first1=Charles Thomas|last2=Garrity|first2=George M.|editor2-first=George M|editor2-last=Garrity|editor1-first=Charles Thomas|editor1-last=Parker}} Notable species include M. plutonius, which is a cause of European foulbrood (an infectious disease that primarily affects honeybees).{{Cite book|last=Vega, Fernando E.|title=Insect pathology|date=2012|publisher=Elsevier/Academic Press|others=Kaya, Harry K., Tanada, Yoshinori.|isbn=978-0-12-384984-7|edition=2nd|location=Amsterdam|oclc=778786616}}