![]() The genus Streptococcus has around 129 species and 23 subspecies that benefit many microbiomes on the human body. ![]() The species Streptococcus pneumoniae belongs to the genus Streptococcus and the family Streptococcaceae. Gram-positive diplococci Streptococcus pneumoniae Diplococcus formation of S. catarrhalis is a salient pathogen contributing to infections in the human body. However, only one has a morphology of diplococcus, Moraxella catarrhalis. This genus, Moraxellaceae, comprises gram-negative coccobacilli bacteria: Moraxella lacunata, Moraxella atlantae, Moraxella boevrei, Moraxella bovis, Moraxella canis, Moraxella caprae, Moraxella caviae, Moraxella cuniculi, Moraxella equi, Moraxella lincolnii, Moraxella nonliquefaciens, Moraxella osloensis, Moraxella ovis and Moraxella saccharolytica, Moraxella pluranimalium. The genus Moraxella belongs to the family Moraxellaceae. Moraxella catarrhalis Pictorial representation of diplococcus formation in M. ![]() Of these Neisseria species, the most common, pathogenic species are N. The gram-negative, coccoid species include: Neisseria cinerea, Neisseria gonorrhoeae, Neisseria polysaccharea, Neisseria lactamica, Neisseria meningitidis, Neisseria mucosa, Neisseria oralis and Neisseria subflava. This genus, Neisseria, is divided into more than ten different species, but most of them are gram negative and coccoid. The genus Neisseria belongs to the family Neisseriaceae. Example of diplococcus formation in bacteria of N. Taxonomy Gram-negative diplococci Neutrophils infected with Neisseria gonorrhoeae, with characteristic small gram-negative diplococci. Presumably, diplococcus has been implicated in encephalitis lethargica. Examples of gram-positive diplococci are Streptococcus pneumoniae and Enterococcus spp. Structure b represents diplococcus bacteriaĪ diplococcus (plural diplococci) is a round bacterium (a coccus) that typically occurs in the form of two joined cells.Įxamples of gram-negative diplococci are Neisseria spp. Not to be confused with Diplocaulus or Diplodocus.
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