Can Corynebacterium grow on MacConkey Agar?
The presence of coryneform organisms in smears is diagnostic. Culture on blood agar, selective blood agar and MacConkey agar are also diagnostic, they do not grow on MacConkey.
What antibiotics cover Corynebacterium?
Many antibiotics are effective, including penicillin, erythromycin, clindamycin, rifampin, and tetracycline; erythromycin or penicillin is the treatment of choice and is usually given for 14 days.
Does ceftriaxone cover Corynebacterium?
Based on CLSI M45 breakpoint criteria for Corynebacterium, highest resistance rates were observed for ciprofloxacin (73.7%), followed by trimethoprim/sulfamethoxazole (71.6%), erythromycin (65.5%) and ceftriaxone (63.6%; Table 2).
What bacteria can grow on MacConkey agar?
Altogether, MacConkey agar only grows gram-negative bacteria, and those bacteria will appear differently based on their lactose fermenting ability as well as the rate of fermentation and the presence of a capsule or not.
Where is Corynebacterium found in the body?
They are ubiquitous and can be found on the skin and in the upper respiratory and gastrointestinal tracts. The primary pathogen in this group is Corynebacterium diphtheriae, the etiologic agent of diphtheria. Additional corynebacteria include 45 species, 30 of which on rare occasion cause human disease.
Does meropenem cover Corynebacterium?
Among Corynebacterium jeikeium, strains were encountered that showed susceptibility to meropenem but resistance to imipenem and other beta-lactams. Strains of other corynebacteria, Rhodococcus equi, Erysopelothrix rhusiopathiae, Listeria monocytogenes, and Bacillus spp.
What is diphtheria caused by?
Diphtheria is an infection caused by the Corynebacterium diphtheriae bacterium. Diphtheria spreads (transmits) from person to person, usually through respiratory droplets, like from coughing or sneezing.
Is diphtheria contagious?
Diphtheria is a very contagious infection that makes it difficult to breathe. In severe cases, it can cause heart and nerve damage. Pertussis , or whooping cough, is an extremely contagious respiratory infection that can lead to severe breathing problems, especially in infants.
How is diphtheria transmitted?
The diphtheria bacterium can enter the body through the nose and mouth, causing respiratory diphtheria. It is transmitted from person to person by respiratory secretions or by breathing in droplets that contain diphtheria bacteria from an infected person when he or she is coughing or sneezing.