Table of Contents
Is Moraxella Lacunata Gram positive or negative?
lacunata infection. The genus Moraxella is a gram-negative, aerobic coccobacillus or rod-shaped bacterium and usually has low virulence [11, 22].
How do you test for Moraxella?
Confirmation of the diagnosis of M catarrhalis infection is based on isolation of the organism in culture. Cultures can be taken from middle ear effusion, the nasopharynx, sputum, sinus aspirates, transtracheal or transbronchial aspirates, blood, peritoneal fluid, wounds, or urine.
What is the Gram stain of Moraxella Lacunata?
Moraxella lacunata (M. lacunata) is a Gram-negative bacterium, which rarely causes serious infection. This is a rare case report of acute glomerulonephritis diagnosed by pathological findings in a child accompanied by M. lacunata infection.
Which test is positive for all Neisseria and Moraxella?
The superoxol test was positive for all 116 gonococci and 62 Moraxella (Branhamella) catarrhalis strains, but also for three strains of Neisseria meningitidis, one strain of Neisseria lactamica and eight saprophytic neisseriae.
Is Moraxella catarrhalis beta lactamase positive?
Antibiotic susceptibility testing conducted in this study revealed that all the M. catarrhalis isolates were beta-lactamase producers. Studies from Australia, Europe, and the United States have reported beta-lactamase production in over 90% of the similar isolates [14].
What is Moraxella catarrhalis beta lactamase positive?
Beta-lactamases produced by the M. catarrhalis not only protect the pathogen but also inactivate penicillin, an antibiotic that is commonly used for the treatment of mixed infections caused by other airway pathogens such as Streptococcus pneumoniae and/or nontypeable Haemophilus influenzae [1, 4].
Is Moraxella catalase-positive?
Moraxella organisms are small, gram-negative bacteria that grow well on blood or chocolate agar. They are catalase and oxidase positive.
How do you differentiate Moraxella and Neisseria?
They can be differentiated from Moraxella and Neisseria species by a catalase test. Most Kingella species are catalase negative; Moraxella and most Neisseria species (except Neisseria elongata) are catalase positive.
Is Moraxella gram-negative rod?
Does Moraxella ferment glucose?
M. catarrhalis typically is oxidase positive and fails to ferment glucose, maltose, sucrose and lactose.
What is beta-lactamase test?
Beta-Lactamase Test rapidly detects the presence of beta-lactamase enzyme produced by strains of Staphylococcus aureus, Neisseria gonorrhoeae, Branhamella catarrhalis, and Haemophilus influenzae.
How can you tell the difference between Moraxella and Neisseria?
Does Moraxella grow on MacConkey Agar?
They grow well on blood agar as well as chocolate agar but not on MacConkey agar.
What is Gonochek II test?
Gonochek II is a tube test that is designed to differentiate between Neisseria lactamica, N. meningitidis, N. gonorrhoeae and Moraxella catarrhalis. The enzymes produced by these species are detected in a single test by the production of colored endproducts from colorless substrates.
Is Moraxella catalase positive?
Most Kingella species are catalase negative; Moraxella and most Neisseria species (except Neisseria elongata) are catalase positive.
What are the lab results for Moraxella catarrhalis?
Typically positive resultswith Moraxella catarrhalis: The oxidase test The catalase test Tributyrin hydrolysis Typically negative resultswith Moraxella catarrhalis:
How do you test for rapid tributyrin?
1. The performance of Rapid Tributyrin is dependent on a properly prepared inoculum. Test only oxidase-positive, gram-negative diplococci grown on nonselective medium. Inoculate each tube heavily with a 3 mm loopful of the test isolate from a pure, 18-24 hour culture. Mix thoroughly. 2.
What is the product of hydrolysis in Moraxella catarrhalis?
Tributyrin hydrolysis Typically negative resultswith Moraxella catarrhalis: Acid from glucose Acid from maltose Acid from fructose Acid from sucrose
What is Moraxella and how dangerous is it?
To begin with, Moraxellais a true ophthalmic pathogen, an “eye bug” par excellence that can occasionally be found colonising the nasopharynx and on other mucous membranes,1although rarely causing infections in other parts of the body.