Archive for November 30, 2016

Disseminated Mycobacterium abscessus Infection Following Septic Arthritis: A Case Report and Review of the Literature.

Medicine (Baltimore). 2015 May;94(21):e861.

Fukui S1, Sekiya N, Takizawa Y, Morioka H, Kato H, Aono A, Chikamatsu K, Mitarai S, Kobayashi S, Kamei S, Setoguchi K.

Author information

1From the Department of Rheumatology (SF, YT, S Kobayashi, S Kamei, KS); Clinical Laboratory (NS, HM, HK), Tokyo Metropolitan Cancer and Infectious Diseases Center, Komagome Hospital, Tokyo; and Department of Mycobacterium Reference and Research (AA, KC, SM), The Research Institute of Tuberculosis, Japan Anti-Tuberculosis Association, Kiyose, Japan.

Abstract

Mycobacterium abscessus is a rapidly growing mycobacterium found mainly in patients with respiratory or cutaneous infections, but it rarely causes disseminated infections.

Little is known about the clinical characteristics, treatment, and prognosis of disseminated M abscessus infection.

A 75-year-old Japanese woman who had been treated for 17 years with a corticosteroid for antisynthetase syndrome with antithreonyl-tRNA synthetase antibody developed swelling of her right elbow.

X-ray of her right elbow joint showed osteolysis, and magnetic resonance imaging revealed fluid in her right elbow joint.

M abscessus grew in joint fluid and blood cultures. She was diagnosed with a disseminated M abscessus infection following septic arthritis.

Antimicrobial treatment by clarithromycin, amikacin, and imipenem/cilastatin combined with surgical debridement was administered.

Although blood and joint fluid cultures became negative 1 week later, the patient died at 6 weeks from starting antimicrobial treatment.

We reviewed 34 cases of disseminated M abscessus infections from the literature. Most of the patients had immunosuppressive backgrounds such as transplantation, use of immunosuppressive agents, hematological malignancy, and end stage renal disease.

The duration from onset of symptoms to diagnosis was over 3 months in half of the cases. All fatal cases had positive blood cultures or use of immunosuppressive agents.

Clinicians should bear in mind that mycobacterial infections including M abscessus are one of the differential diagnoses in patients with subacute arthritis and soft tissue infections.

PDF

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4616402/pdf/medi-94-e861.pdf

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November 30, 2016 at 1:42 pm

Update on pulmonary disease due to non-tuberculous mycobacteria.

Int J Infect Dis. 2016 Apr;45:123-34.

Stout JE1, Koh WJ2, Yew WW3.

Author information

1Division of Infectious Diseases and International Health, Department of Medicine, Duke University Medical Center, Box 102359-DUMC, Durham, NC 27710, USA. Electronic address: jason.stout@dm.duke.edu

2Division of Pulmonary and Critical Care Medicine, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, South Korea.

3Stanley Ho Centre for Emerging Infectious Diseases, The Chinese University of Hong Kong, Hong Kong, China.

Abstract

Non-tuberculous mycobacteria (NTM) are emerging worldwide as significant causes of chronic pulmonary infection, posing a number of challenges for both clinicians and researchers.

While a number of studies worldwide have described an increasing prevalence of NTM pulmonary disease over time, population-based data are relatively sparse and subject to ascertainment bias. Furthermore, the disease is geographically heterogeneous.

While some species are commonly implicated worldwide (Mycobacterium avium complex, Mycobacterium abscessus), others (e.g., Mycobacterium malmoense, Mycobacterium xenopi) are regionally important.

Thoracic computed tomography, microbiological testing with identification to the species level, and local epidemiology must all be taken into account to accurately diagnose NTM pulmonary disease.

A diagnosis of NTM pulmonary disease does not necessarily imply that treatment is required; a patient-centered approach is essential.

When treatment is required, multidrug therapy based on appropriate susceptibility testing for the species in question should be used. New diagnostic and therapeutic modalities are needed to optimize the management of these complicated infections.

PDF

http://www.ijidonline.com/article/S1201-9712(16)30993-6/pdf

November 30, 2016 at 1:39 pm

Diagnosis and Treatment of Nontuberculous Mycobacterial Lung Disease.

J Korean Med Sci. 2016 May;31(5):649-59.

Kwon YS1, Koh WJ2.

Author information

1Department of Internal Medicine, Chonnam National University Hospital, Gwangju, Korea .

2Division of Pulmonary and Critical Care Medicine, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea .

Abstract

Nontuberculous mycobacteria (NTM) are ubiquitous organisms; their isolation from clinical specimens does not always indicate clinical disease.

The incidence of NTM lung diseases has been increasing worldwide. Although the geographic diversity of NTM species is well known, Mycobacterium avium complex (MAC), M. abscessus complex (MABC), and M. kansasii are the most commonly encountered and important etiologic organisms.

Two distinct types of NTM lung diseases have been reported, namely fibrocavitary and nodular bronchiectatic forms.

For laboratory diagnosis of NTM lung diseases, both liquid and solid media cultures and species-level identification are strongly recommended to enhance growth detection and determine the clinical relevance of isolates.

Treatment for NTM lung diseases consists of a multidrug regimen and a long course of therapy, lasting more than 12 months after negative sputum conversion.

For MAC lung disease, several new macrolide-based regimens are now recommended. For nodular bronchiectatic forms of MAC lung diseases, an intermittent three-time-weekly regimen produces outcomes similar to those of daily therapy.

Treatment of MABC lung disease is very difficult, requiring long-term use of parenteral agents in combination with new macrolides. Treatment outcomes are much better for M. massiliense lung disease than for M. abscessus lung disease.

Thus, precise identification of species in MABC infection is needed for the prediction of antibiotic response. Likewise, increased efforts to improve treatment outcomes and develop new agents for NTM lung disease are needed.

PDF

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4835588/pdf/jkms-31-649.pdf

November 30, 2016 at 1:37 pm

Clinical efficacy and safety of multidrug therapy including thrice weekly intravenous amikacin administration for Mycobacterium abscessus pulmonary disease in outpatient settings: a case series.

BMC Infect Dis. 2016 Aug 9;16:396.

Namkoong H1,2,3, Morimoto K4, Nishimura T5, Tanaka H1, Sugiura H6, Yamada Y6, Kurosaki A7, Asakura T1, Suzuki S1, Fujiwara H8, Yagi K1, Ishii M1, Tasaka S1, Betsuyaku T1, Hoshino Y9, Kurashima A4, Hasegawa N10.

Author information

1Division of Pulmonary Medicine, Department of Medicine, Keio University School of Medicine, Tokyo, Japan.

2Japan Society for the Promotion of Science, Tokyo, Japan.

3Department of Pulmonary Medicine, Eiju General Hospital, Tokyo, Japan.

4Respiratory Disease Center, Fukujuji Hospital, Japan Anti-Tuberculosis Association, Tokyo, Japan.

5Keio University Health Center, Tokyo, Japan.

6Department of Diagnostic Radiology, Keio University School of Medicine, Tokyo, Japan.

7Department of Diagnostic Radiology, Fukujuji Hospital, Japan Anti-Tuberculosis Association, Tokyo, Japan.

8Center for Infectious Diseases and Infection Control, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo, 160-8582, Japan.

9Leprosy Research Center, National Institute of Infectious Diseases, Tokyo, Japan.

10Center for Infectious Diseases and Infection Control, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo, 160-8582, Japan. n-hasegawa@z8.keio.jp

Abstract

BACKGROUND:

Mycobacterium abscessus (M. abscessus) pulmonary disease is a refractory chronic infectious disease. Options for treating M. abscessus pulmonary disease are limited, especially in outpatient settings. Among parenteral antibiotics against M. abscessus, intravenous amikacin (AMK) is expected to be an effective outpatient antimicrobial therapy. This study evaluated the clinical efficacy and safety of intravenous AMK therapy in outpatients with M. abscessus pulmonary disease.

METHODS:

This retrospective chart review of cases of M. abscessus pulmonary disease evaluated patient background data, AMK dosage and duration, sputum conversion, clinical symptoms radiological findings, and adverse events. M. massiliense was excluded on the basis of multiplex PCR assay.

RESULTS:

Thirteen patients (2 men and 11 women) with M. abscessus pulmonary disease were enrolled at 2 hospitals. The median age at the initiation of intravenous AMK treatment was 65 years (range: 50-86 years). Patients received a median AMK dose of 12.5 mg/kg (range: 8.3-16.2 mg/kg) for a median duration of 4 months (range: 3-9 months). The addition of intravenous AMK led to sputum conversion in 10 of 13 patients, and 8 patients continued to have negative sputum status 1 year after treatment. Approximately half of the patients showed improvement on chest high-resolution computed tomography. There were no severe adverse events such as ototoxicity, vestibular toxicity, and renal toxicity.

CONCLUSIONS:

Thrice weekly intravenous AMK administration in outpatient settings is effective and safe for patients with M. abscessus pulmonary disease

PDF

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4977760/pdf/12879_2016_Article_1689.pdf

November 30, 2016 at 1:35 pm


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