What organisms are gram-negative Diplococci?
The gram-negative, coccoid species include: Neisseria cinerea, Neisseria gonorrhoeae, Neisseria polysaccharea, Neisseria lactamica, Neisseria meningitidis, Neisseria mucosa, Neisseria oralis and Neisseria subflava.
What organisms are catalase negative?
coli, Enterobacter, Klebsiella, Shigella, Yersinia, Proteus, Salmonella, Serratia), Pseudomonas, Mycobacterium tuberculosis, Aspergillus, Cryptococcus, and Rhodococcus equi. If not, the organism is ‘catalase-negative’. Streptococcus and Enterococcus spp. are catalase-negative.
Does Streptococcus pyogenes produce catalase?
S. pyogenes is a gram-positive, β-hemolytic streptococcus that is catalase negative. More than 150 different strains have been identified based on different M-protein types. It is a group A streptococcus based on its carbohydrate structure, according to Lancefield typing of β-hemolytic strains.
Is Streptococcus catalase positive or negative?
Gram-positive cocci include Staphylococcus (catalase-positive), which grows clusters, and Streptococcus (catalase-negative), which grows in chains.
What causes Gram-negative Diplococci?
Gonorrhea infection is a common STI caused by Neisseria gonorrhoeae, a gram-negative diplococcus bacterium that is closely related to other human Neisseria species. Men typically present with a urethral discharge; women are often asymptomatic, but may have vaginal discharge.
What is a Gram-negative Coccobacillus?
The Gram-negative coccobacilli, Haemophilus influenza can cause a variety of infections, including meningitis, an infection that results in inflammation of the brain and spinal cord, as well as pneumonia, an infection of the lungs.
Is Micrococcus Gram positive or negative?
Micrococcus spp. are Gram-positive aerobic spherical cocci. They are catalase positive, reduce nitrate to nitrite and are usually non-motile.
Why are anaerobes catalase negative?
The enzyme, catalase, is produced by bacteria that respire using oxygen, and protects them from the toxic by-products of oxygen metabolism. Catalase-negative bacteria may be anaerobes, or they may be facultative anaerobes that only ferment and do not respire using oxygen as a terminal electron acceptor (ie.
How does Staphylococcus differ from Micrococcus?
Micrococcus and Staphylococcus are Gram-positive cocci that are non-motile, non-sporing, and Catalase positive. Both live as normal flora on the skin and the mucous membranes. Micrococcus arrangements are mostly tetrads or pairs while Staphylococcus arrangements are mainly clusters, sometimes pairs or short chains.
What disease is caused by Diplococci bacteria?
Gonorrhea infection is a common STI caused by Neisseria gonorrhoeae, a gram-negative diplococcus bacterium that is closely related to other human Neisseria species.
How do you treat Diplococci?
Adults with gonorrhea are treated with antibiotics. Due to emerging strains of drug-resistant Neisseria gonorrhoeae, the Centers for Disease Control and Prevention recommends that uncomplicated gonorrhea be treated with the antibiotic ceftriaxone — given as an injection — with oral azithromycin (Zithromax).
What does Gram-negative mean in bacteria?
Gram-negative bacteria are bacteria that do not retain the crystal violet stain used in the Gram staining method of bacterial differentiation.
What does Gram negative diplococci mean?
Gram negative diplococci bacteria. Gram negative diplococci bacteria as shown above image. Gram stain of CSF having Gram negative diplococci indicates Neissera menigitidis. where as Gram stain of urethral discharge having such property indicates Neisseria gonorrhoeae.
What are the most common Gram-negative cocci?
This post was most recently updated on August 26th, 2019. The most common gram-negative cocci of medical importance belong to the family Neisseriaceae which includes the genera Neisseria, Moraxella, Kingella, Acinetobacter etc.
Is Neisseria gonorrhoeae Gram negative or positive?
Neisseria gonorrhoeae (Gram negative diplococci) This post was most recently updated on August 26th, 2019. The most common gram-negative cocci of medical importance belong to the family Neisseriaceae which includes the genera Neisseria, Moraxella, Kingella, Acinetobacter etc.
What does Gram negative diplococci in urethral discharge indicate?
Gram negative diplococci bacteria as shown above image. Gram stain of CSF having Gram negative diplococci indicates Neissera menigitidis where as Gram stain of urethral discharge having such property indicates Neisseria gonorrhoeae.