Is Neisseria meningitidis Coccobacilli?
Is Neisseria meningitidis Coccobacilli?
Neisseria meningitidis, often referred to as meningococcus, is a Gram-negative bacterium that can cause meningitis and other forms of meningococcal disease such as meningococcemia, a life-threatening sepsis….
| Neisseria meningitidis | |
|---|---|
| Domain: | Bacteria |
| Phylum: | Proteobacteria |
| Class: | Betaproteobacteria |
| Order: | Neisseriales |
Is meningococcal meningitis Gram positive or negative?
N. meningitidis is a fastidious, encapsulated, aerobic gram-negative diplococcus. Colonies are positive by the oxidase test and most strains utilize maltose.
Is Neisseria gram-negative bacilli?
Neisseria species are Gram-negative cocci, 0.6 to 1.0 μm in diameter. The organisms are usually seen in pairs with the adjacent sides flattened. Pili, hairlike filamentous appendages extend several micrometers from the cell surface and have a role in adherence.
Is Haemophilus influenzae gram-negative?
H. influenzae are small, pleomorphic, gram-negative bacilli or coccobacilli with random arrangements.
Are gram-negative cocci common?
Neisseria species are Gram-negative cocci that typically attach in pairs and are some of the most common aerobic Gram-negative cocci. Neisseria meningitidis is a common cause of meningitis in children and young adults. Neisseria gonorrheae is an important cause of urethritis and cervicitis.
Are Gram-negative cocci common?
Is pneumococcal Gram positive or negative?
Streptococcus pneumoniae (pneumococci) are gram-positive, alpha-hemolytic, aerobic, encapsulated diplococci. In the US, pneumococcal infection is a major cause of otitis media, pneumonia, sepsis, meningitis, and death. Diagnosis is by Gram stain and culture.
Is Haemophilus gram-negative?
Chapter 9: Identification and Characterization of Haemophilus influenzae. H. influenzae are small, pleomorphic, gram-negative bacilli or coccobacilli with random arrangements.
Is Neisseria sicca Gram positive or negative?
Neisseria sicca is a gram-negative diplococcus found as nor- mal human oral and upper respiratory tract flora; it is considered one of the commensal Neisseria species.
