neisseria bacterial colonies on chocolate agar plate

agar background bacteria bacterial brown chocolate clap closeup colonies colonisation colony copy culture disease dish enrichment glossy gonhorea gonococcal gonococci gonorrhea gonorrhoeae grow identification infection isolated laboratory line medical medium meningitidis meningitis meningococci micro microbiology neisseria organism pathogen petri plate research sexual species strain streak test top transmission urethritis view virulence white