Challenges in Treating Mycobacterium chelonae/abscessus Prosthetic Joint Infection.

Prosthetic joint infections (PJIs) remain a major complication of arthroplasty, most of which are caused by Staphylococcus aureus and gram-negative bacteria. Unfortunately, cultures are false negative in upward of 7 percent of patients with suspected PJIs, and commonly in infections caused by rare rapidly growing mycobacterium (RGM) species. Guidelines recommend 6 months of antimycobacterial therapy for bone diseases caused by RGM, with empiric therapy consists of an oral macrolide (clarithromycin or azithromycin) plus tobramycin and imipenem-cilastatin. Definitive treatment of PJI due to RGM should be guided by antimicrobial susceptibility, however, most microbiology laboratories are unable to differentiate between M. chelonae and M. abscessus. Furthermore, treatment of M. chelonae PJI is challenging due to multidrug resistance and the dearth of oral antibiotics for therapy. This case report investigates a patient with PJI caused by M. chelonae and M. abscessus. The initial treatment with imipenem-cilastatin was complicated by drug induced seizures, further limiting therapy options.

Skin infections by Mycobacterium chelonae following mesotherapy: A report of two cases and review of the literature.

Mesotherapy is sometimes responsible for dermal and subcutaneous infections caused by nontuberculous mycobacteria. Mycobacterium chelonae, M abscessus, and M fortuitum are usually involved. We present two cases of deep skin infections caused by M chelonae following mesotherapy. A review of the literature is included.

Mycobacterium stephanolepidis sp. nov., a rapidly growing species related to Mycobacterium chelonae, isolated from marine teleost fish, Stephanolepis cirrhifer.

A previously undescribed rapidly growing, non-pigmented mycobacterium was identified based on biochemical and nucleic acid analyses, as well as growth characteristics. Seven isolates were cultured from samples collected from five thread-sail filefish (Stephanolepis cirrhifer) and two farmed black scraper (Thamnaconus modestus). Bacterial growth occurred at 15-35 °C on Middlebrook 7H11 agar. The bacteria were positive for catalase activity at 68 °C and urease activity, intermediate for iron uptake, and negative for Tween 80 hydrolysis, nitrate reduction, semi-quantitative catalase activity and arylsulfatase activity at day 3. No growth was observed on Middlebrook 7H11 agar supplemented with picric acid, and very little growth was observed in the presence of 5 % NaCl. α- and α'-mycolates were identified in the cell walls, and a unique profile of the fatty acid methyl esters and matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS) profiles of the protein and cell-wall lipids were acquired. Sequence analysis revealed that the seven isolates shared identical sequences for the 16S rRNA, rpoB, hsp65, recA and sodA genes. Phylogenetic analysis of the five gene sequences confirmed that the isolates were unique, but closely related to Mycobacterium chelonae. Antibiotic susceptibility testing revealed the minimum inhibitory concentration (MIC) of clarithromycin against this novel species was <0.25 µg ml-1, which was lower than that for Mycobacterium salmoniphilum. The hsp65 PCR restriction enzyme analysis pattern differed from those of M. chelonae and M. salmoniphilum. Based on these findings, the name Mycobacterium stephanolepidis sp. nov. is proposed for this novel species, with the type strain being NJB0901T (=JCM 31611T=KCTC 39843T).

Mycobacterium chelonae hand infection after steroid injection in a patient with rheumatoid arthritis receiving long-term linezolid therapy.

A 66-year-old multimorbid man with rheumatoid arthritis developed an infection after a steroid injection in the hand. Mycobacterium chelonae was cultured 1-month after presentation. In the mean time, his third finger had been amputated. Further treatment was based on preliminary susceptibility testing and the American Thoracic Society guidelines. No regression of the infection was observed before the addition of linezolid (600 mg×1/day) to a combination antimicrobial therapy also consisting of clarithromycin (500 mg×2/day) and moxifloxacin (400 mg×1/day), even though two methods of susceptibility testing, the E-test and broth microdilution, had shown susceptibility to other antimicrobial drugs. The healing was complete 12 months after presentation. There were no serious side effects observed with the use of linezolid in reduced dosage of 600 mg×1/day for a duration of 9 months.

A Case of Mycobacterium chelonae Infection at the Site of Acupuncture / 대한피부과학회지

No abstract available.

Mycobacterium chelonae infections associated with bee venom acupuncture.

We report 3 cases of Mycobacterium chelonae infections after bee venom acupuncture. All were treated with antibiotics and surgery. Mycobacterium chelonae infections should be included in the differential diagnosis of chronic skin and soft tissue infections following bee venom acupuncture.

Mycobacterium chelonae abscesses associated with biomesotherapy, Australia, 2008.

An outbreak of skin abscesses occurred in Adelaide, Australia, in association with biomesotherapy, an alternative therapy practice. Mycobacterium chelonae was identified in 8 patient and 3 environmental samples. Our findings show M. chelonae infection can be associated with alternative therapies when infection-control breaches occur. Tighter regulations of alternative therapy practices are needed.

Pedicure-associated rapidly growing mycobacterial infection: an endemic disease.

BACKGROUND: Pedicure-associated nontuberculous mycobacterial furunculosis has been reported in the setting of either outbreaks or sporadic case reports. The epidemiology of these infections is not well understood. METHODS: Systematic surveillance for pedicure-associated nontuberculous mycobacterial furunculosis was conducted in 2 North Carolina counties from 1 January 2005 through 31 December 2008. A subset of implicated nail salons and control salons was inspected and sampled for nontuberculous mycobacteria. RESULTS: Forty cases of suspected or confirmed pedicure-associated nontuberculous mycobacterial furunculosis were reported during the 4-year study period. Furunculosis incidence in the surveillance region was 1.00, 0.96, 0.83, and 0.89 cases per 100,000 population in 2005, 2006, 2007, and 2008, respectively. The responsible organisms primarily belonged to the Mycobacterium chelonae/abscessus group (30 [91%] of 33 isolates). Thirteen implicated salons and 11 control salons were visited and environmentally sampled. An assortment of nontuberculous mycobacteria was cultured from footbaths, but there was no association between the species distribution of the environmental isolates and implication of the salon in human infection. Evidence of suboptimal cleaning (visible debris or surface biofilms) was observed in at least 1 footbath for 11 of 13 implicated salons and 4 of 11 control salons (P = .032). CONCLUSIONS: Pedicure-associated mycobacterial furunculosis was endemic in these 2 North Carolina counties during 2005-2008. Suboptimal footbath cleaning may have contributed to these infections, which suggests straightforward means of potential prevention. The relative rarity of this type of infection in the setting of nearly ubiquitous exposure to these pathogens suggests that as yet undefined host-specific or procedure-related factors may be involved in susceptibility to these infections.

An outbreak of cutaneous infection due to Mycobacterium abscessus associated to mesotherapy.

INTRODUCTION: In February 2009 an outbreak of subcutaneous abscesses due to Mycobacterium abscessus was detected in Spain which affected healthy women who had undergone mesotherapy procedures in an aesthetic clinic. METHODS: Epidemiological research, health inspection and microbiological studies were conducted. The patients were given antibiotic treatment (according to susceptibility testing) with clarithromycin, and in some cases, combined with amikacin. RESULTS: Seventeen out of 77 patients treated in the clinic were affected. The products used for the injections were homeopathic drugs in multi-dose vials. The environmental samples were negative. The sterile injection equipment and the clinical procedures were evaluated as correct. The storage conditions for the drugs were also correct, and all the samples tested negative for Mycobacteria. However Paenibacillus provencensis was isolated from samples of unused multi-dose vials and the withdrawal of the product from distribution was ordered. Deficiencies were detected in the sterile products process of at the homeopathic drug factory, so the production line was suspended. CONCLUSIONS: The results of environmental investigation suggest the most likely cause of the outbreak could have been the contamination of the products in the factory, although there was no laboratory confirmation. The widespread use of homeopathic products in invasive procedures requires extreme control during the manufacturing, handling and packaging process. It is important to consider mesotherapy and parenteral use of homeopathic medicines as potential sources of infection and therefore the same precautions in the procedures and quality assurance of products should be applied as with any other drug or medical activity.

[Non-tuberculous mycobacterial infections related to esthetic care in France, 2001-2010]. / Infections à mycobactéries atypiques liées à des soins esthétiques en France, 2001-2010.

Non-tuberculous mycobacteria (NTM) infections usually occur in immunocompromised patients but also in immunocompetent patients following invasive procedures, especially for esthetic purposes. Since 2001, 20 episodes (57 cases) of NTM infections, seven of which (43 cases) were related to esthetic care, have been reported to the regional infection control coordinating centers (RICCC), the local health authorities (LHA), and the national institute for public health surveillance. Four notifications (40 cases) were related to non-surgical procedures performed by general practitioners in private settings: mesotherapy, carboxytherapy, and sclerosis of microvaricosities. The three other notifications (three cases) concerned surgical procedures-lifting and mammary prosthesis. Practice evaluations performed by the RICCC and LHA for five notifications showed deficiency of standard hygiene precautions and tap water misuse for injection equipment cleaning, or skin disinfection. Microbiological investigations (national reference center for mycobacteria) demonstrated the similarity of patient and environmental strains: in one episode (16 cases after mesotherapy), M. chelonae isolated from tap water was similar to those isolated from 11 cases. Healthcare-associated NTM infections are rare but have a potentially severe outcome. These cases stress the need of healthcare-associated infection notifications in outpatient settings.

Mybacterium chelonae Infection Occurring at the Site of Bee Sting Therapy / 대한피부과학회지

Mycobacterium chelonae is a rapidly growing atypical mycobacterium found in soil and water. In a healthy person, it causes cutaneous infection after an invasive procedure or surgery. Herein, we present a case of a 52-year-old man with multiple erythematous plaques and nodules on the back and left arm, and these occurred at the site of bee sting therapy by a herbal medical doctor. The histologic findings showed a granulomatous infiltration composed of numerous neutrophils, lymphocytes, eosinophils, histiocytes and multinucleated giant cells. Acid fast bacilli were detected by Ziehl-Neelsen stain and Mycobacterium chelonae infection was confirmed by an INNO-LiPA mycobacteria kit. The patient was treated with 1 g of clarithromycin and 200 mg of doxycycline for 6 months and his condition improved considerably.

[A cutaneous infection by Mycobacterium chelonae in a patient with rheumatoid arthritis]. / Infecção cutânea por Mycobacterium chelonae numa doente com artrite reumatóide.

There are no pathognomonic findings for cutaneous infection caused by Mycobacterium chelonae. The type and duration of therapy varies considerably among reports and no single antibiotic is considered the treatment of choice. A 61-year-old patient, suffering from rheumatoid arthritis (treated with metotrexate and salazopyrine), presented with violaceous nodules of the right leg that had been evolving for 6 months. She was underwent several skin biopsies. Tissue culture of the last showed an atypical mycobacteria, identified as M. chelonae. Despite improvement after a two-week course of treatment with clarithromycin, a switch to ciprofloxacin was made because of gastrointestinal intolerance. After 3 months, only slight improvement of the lesions was achieved and clarithromycin was reintroduced; significant clinical improvement occurred by the third month. Clarithromycin was continued a further two months until the patient quit on her own and. no recurrence was observed. Infections caused by M. chelonae frequently occur in the setting of immunological impairment. Contaminated water is the natural reservoir, but we were unable to establish the source of contamination. As was previously described, there was a significant delay between clinical presentation and diagnosis. Thus, a high index of suspicion and multiple biopsies with culture are of paramount importance to confirming the diagnosis.

Clinical management of rapidly growing mycobacterial cutaneous infections in patients after mesotherapy.

BACKGROUND: Increasing numbers of patients are expressing an interest in mesotherapy as a method of reducing body fat. Cutaneous infections due to rapidly growing mycobacteria are a common complication of such procedures. METHODS: We followed up patients who had developed cutaneous infections after undergoing mesotherapy during the period October 2006-January 2007. RESULTS: Sixteen patients were infected after mesotherapy injections performed by the same physician. All patients presented with painful, erythematous, draining subcutaneous nodules at the injection sites. All patients were treated with surgical drainage. Microbiological examination was performed on specimens that were obtained before and during the surgical procedure. Direct examination of skin smears demonstrated acid-fast bacilli in 25% of the specimens that were obtained before the procedure and 37% of the specimens obtained during the procedure; culture results were positive in 75% of the patients. Mycobacterium chelonae was identified in 11 patients, and Mycobacterium frederiksbergense was identified in 2 patients. Fourteen patients were treated with antibiotics, 6 received triple therapy as first-line treatment (tigecycline, tobramycin, and clarithromycin), and 8 received dual therapy (clarithromycin and ciprofloxacin). The mean duration of treatment was 14 weeks (range, 1-24 weeks). All of the patients except 1 were fully recovered 2 years after the onset of infection, with the mean time to healing estimated at 6.2 months (range, 1-15 months). CONCLUSIONS: This series of rapidly growing mycobacterial cutaneous infections highlights the difficulties in treating such infections and suggests that in vitro susceptibility to antibiotics does not accurately predict their clinical efficacy.

Outbreak of nontuberculous mycobacterial subcutaneous infections related to multiple mesotherapy injections.

We describe an outbreak of severe subcutaneous infections due to nontuberculous mycobacteria following mesotherapy. Epidemiological studies and molecular comparisons of Mycobacterium chelonae strains from different patients and the environment suggested that contamination may be associated with inappropriate cleaning of the multiple-injection device with tap water.