How do you identify Mycobacterium marinum?

Diagnosis is essentially made through histological examination and culture. The laboratory staff should always be notified that M. marinum is suspected, so that Lowenstein-Jensen agar cultures at 28°-32°C, besides those at 37°C, are prepared. The material should be left 6 weeks in the agar.

Where is Mycobacterium marinum found?

Mycobacterium marinum is an atypical Mycobacterium species found in cold or warm, fresh or salted water. M marinum infection occurs following skin and soft-tissue injuries that are exposed to an aquatic environment or marine animals.

How does Mycobacterium marinum spread?

M. marinum infection is not contagious; it is not spread from person to person. It is also not transmitted in hospitals like other common bacteria.

Is Mycobacterium marinum a rapid grower?

The pathogen Mycobacterium marinum, a faster growing close relative of Mycobacterium tuberculosis, has a single rRNA operon per genome. FEMS Microbiol Lett.

What can Mycobacterium Marinum cause?

Mycobacterium marinum is a non-tuberculous mycobacterium that causes a tuberculosis-like illness in fish and can infect humans when injured skin is exposed to a contaminated aqueous environment.

Is TB Gram negative or positive?

tuberculosis belongs to the high G+C Gram-positive bacteria that form a monophyletic group with the low G+C Gram-positive bacteria such as Bacillus subtilis. Some analyses indicate no particular relationship between these two groups.

Where is Mycobacterium fortuitum found?

Mycobacterium fortuitum is one of the rapidly growing mycobacteria, which are mainly present in soil and water [6, 7]. M. fortuitum mainly causes skin and bone/joint infections in both immunocompetent and immunocompromised patients [5]. Many patients with M.

Where is Mycobacterium ulcerans found?

Scope of the problem Buruli ulcer has been reported in 33 countries in Africa, the Americas, Asia and the Western Pacific. Most cases occur in tropical and subtropical regions except in Australia, China and Japan.

What is swimming pool granuloma?

A swimming pool granuloma is a long-term (chronic) skin infection. It is caused by the bacteria Mycobacterium marinum (M marinum).

Which Mycobacterium is a rapid grower?

Rapid growing mycobacterium consists of organism of the Mycobacterium fortuitum group and Mycobacterium chelonae/Mycobacterium abscessus group and these usually cause subcutaneous abscesses or cellulitis following trauma in immunocompetent patients.

Which mycobacteria are rapid growers?

Rapidly growing mycobacteria (RGM) have a propensity to produce skin and soft-tissue infections. Among the RGM, the three most clinically relevant species are M. abscessus, M. chelonae, and M.

Why is Mycobacterium Gram-positive?

tuberculosis has an unusual, waxy coating on its cell surface primarily due to the presence of mycolic acid. This coating makes the cells impervious to Gram staining, and as a result, M. tuberculosis can appear weakly Gram-positive.

Can Mycobacterium be Gram-positive?

Mycobacteria are Gram-positive, catalase positive, non-motile, non-spore forming rod-shaped bacteria (0.2–0.6 μm wide and 1.0–10 μm long).

What is Mycobacterium fortuitum complex?

The Mycobacterium fortuitum complex (MFC), composed of several closely related species of nontuberculous mycobacteria (NTM), can cause human pulmonary and extrapulmonary infections. Based on identification of clinical isolates, the distribution of MFC species varies geographically.

What are the characteristics of M fortuitum?

Mycobacterium fortuitum is a nontuberculous species of the phylum Actinomycetota (Gram-positive bacteria with high guanine and cytosine content, one of the dominant phyla of all bacteria), belonging to the genus Mycobacterium.

How do you treat atypical mycobacterial infection?

Treatment options include clarithromycin or azithromycin, with the addition of amikacin, cefoxitin, or imipenem for serious and complicated infections.

What causes swimming pool conjunctivitis?

Exposure to chlorine and chloramines can cause an eye infection called chemical conjunctivitis (pink eye caused by chemical irritants). Chloramines are chemicals that are formed when chlorine binds to the bodily fluids people bring into the pool.

What is the difference between Mycobacterium and mycobacteria?

Mycobacterium is a genus of Actinomycetota, given its own family, the Mycobacteriaceae. Over 190 species are recognized in this genus. This genus includes pathogens known to cause serious diseases in mammals, including tuberculosis (Mycobacterium tuberculosis) and leprosy (Mycobacterium leprae) in humans.

What is the genome of Mycobacterium marinum?

Mycobacterium marinum, a ubiquitous pathogen of fish and amphibia, is a near relative of Mycobacterium tuberculosis, the etiologic agent of tuberculosis in humans. The genome of the M strain of M. marinumcomprises a 6,636,827-bp circular chromosome with 5424 CDS, 10 prophages, and a 23-kb mercury-resistance plasmid.

Is crtbhomolog essential for photochromogenicity in Mycobacterium marinum?

A crtBhomolog essential for photochromogenicity in Mycobacterium marinum: Isolation, characterization, and gene disruption via homologous recombination. J. Bacteriol. 1997;179:5862–5868.

How many secondary metabolites are produced by Mycobacterium marinum?

Little is known of the secondary metabolites produced by M. marinum; however, genome inspection suggests that it has the potential to produce a diverse array of compounds with 34 CDS predicted to encode PKSs.

What is the PMID for Mycobacterium marinum?

PMID: 18403782 Insights from the complete genome sequence of Mycobacterium marinumon the evolution of Mycobacterium tuberculosis