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Mycobacterium genavense Central Nervous System Infection in a Patient with AIDS. Can J Neurol Sci 2023; 50:305-307. [PMID: 35220993 DOI: 10.1017/cjn.2022.6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Addise D, Bitew A, Yaregal Z, Yenew B, Mollalign H, Diriba G, Kebede A. Effect of 1.5% sodium hydroxide final concentration on recovery rate of Mycobacterial Species and decontamination of other Bacterial and Fungal contaminants on sputum. ETHIOPIAN JOURNAL OF PUBLIC HEALTH AND NUTRITION 2016; 1:57-67. [PMID: 30976752 PMCID: PMC6454901] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
BACKGROUND Digestion and decontamination of non-sterile clinical specimens such as sputum are an essential step in the isolation of mycobacteria. Masking of mycobacteria in Mycobacterial growth indicator tube (MGIT) 960 liquid culture system by fungi and bacteria other than mycobacteria is a major problem. OBJECTIVE To assess the effect of 1.5% sodium hydroxide final concentration on recovery rate of mycobacterial species and decontamination of other bacterial and fungal contaminants from sputum sample. METHODOLOGY Laboratory based cross sectional study with convenient sampling technique was carried out on subjects referred to the National Tuberculosis Reference Laboratory of Ethiopian Public Health Institute from November 2015 to February 2016. Single morning sputum was collected from each patient and analyzed. RESULTS A total of 264 subjects were enrolled in the study. The mean age of participant was 31 (SD 20.14 - 41.42) years old. The majority (61%) were male. Increasing the final concentration of NaOH from 1% to 1.5% reduced the contamination rate from 22.4% to 6.8% (P<0.001) without affecting mycobacterial recovery (P=1.00). A total of 26 different species of microbial contaminants were identified as being associated with BACTEC MGIT 960 culture system. CONCLUSION Results presented in this study demonstrated that the use of a final concentration of 1.5% NaOH with NALC method aids in reducing culture contamination rate for decontaminating sputum samples referred for tuberculosis culture diagnosis. Among the identified microbial contaminants, the most predominant was coagulase negative Staphylococcus species.
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Affiliation(s)
- Desalegn Addise
- Ethiopian Public Health Institute, TB/HIV Directorate, TB Research Team, P.O.BOX 1242, Addis Ababa, Ethiopia
| | - Adane Bitew
- Addis Ababa University, College of Health Science, Department of Medical Laboratory Sciences, Addis Ababa, Ethiopia
| | - Zelalem Yaregal
- Ethiopian Public Health Institute, TB/HIV Directorate, TB Research Team, P.O.BOX 1242, Addis Ababa, Ethiopia
| | - Bazezew Yenew
- Ethiopian Public Health Institute, TB/HIV Directorate, TB Research Team, P.O.BOX 1242, Addis Ababa, Ethiopia
| | - Helina Mollalign
- Ethiopian Public Health Institute, TB/HIV Directorate, TB Research Team, P.O.BOX 1242, Addis Ababa, Ethiopia
| | - Getu Diriba
- Ethiopian Public Health Institute, TB/HIV Directorate, TB Research Team, P.O.BOX 1242, Addis Ababa, Ethiopia
| | - Abebaw Kebede
- Ethiopian Public Health Institute, TB/HIV Directorate, TB Research Team, P.O.BOX 1242, Addis Ababa, Ethiopia
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Development and validation of a liquid medium (M7H9C) for routine culture of Mycobacterium avium subsp. paratuberculosis to replace modified Bactec 12B medium. J Clin Microbiol 2013; 51:3993-4000. [PMID: 24048541 DOI: 10.1128/jcm.01373-13] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Liquid culture of Mycobacterium avium subsp. paratuberculosis from clinical samples, such as feces, is the most sensitive antemortem test for the diagnosis of Johne's disease in ruminants. In Australia, New Zealand, the United States, and some other countries, the Bactec 460 system with modified Bactec 12B medium (Becton, Dickinson) has been the most commonly used liquid culture system, but it was discontinued in 2012. In this study, a new liquid culture medium, M7H9C, was developed. It consists of a Middlebrook 7H9 medium base with added Casitone, albumin, dextrose, catalase, egg yolk, mycobactin J, and a cocktail of antibiotics. We found that polyoxyethylene stearate (POES) was not essential for the cultivation of M. avium subsp. paratuberculosis in either the Bactec 12B or the M7H9C medium. The limit of detection determined using pure cultures of the C and S strains of M. avium subsp. paratuberculosis was 7 bacilli per 50 μl inoculum in the two media. The new medium was validated using 784 fecal and tissue samples from sheep and cattle, >25% of which contained viable M. avium subsp. paratuberculosis. Discrepant results for the clinical samples between the two media were mostly associated with samples that contained <10 viable bacilli per gram, but these results were relatively uncommon, and the performances of the two media were not significantly different. M7H9C medium was less than half the cost of the Bactec 12B medium and did not require regular examination during incubation, but a confirmatory IS900 PCR test had to be performed on every culture after the predetermined incubation period.
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Resistance mechanisms and drug susceptibility testing of nontuberculous mycobacteria. Drug Resist Updat 2012; 15:149-61. [DOI: 10.1016/j.drup.2012.04.001] [Citation(s) in RCA: 218] [Impact Index Per Article: 18.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Subramanyam B, Sivaramakrishnan GN, Dusthackeer A, Nagamiah S, Kumar V. Phage lysin as a substitute for antibiotics to detect Mycobacterium tuberculosis from sputum samples with the BACTEC MGIT 960 system. Clin Microbiol Infect 2011; 18:497-501. [PMID: 21883661 DOI: 10.1111/j.1469-0691.2011.03601.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Phage lysin was evaluated as a substitute for antibiotics in sputum samples processed by a modified Petroff's method for the detection of Mycobacterium tuberculosis with the MGIT 960 system. One hundred and fifty sputum samples were processed, inoculated onto two slopes of Lowenstein-Jensen medium, and divided in to two aliquots of 0.5 mL each. One aliquot was added to 7 mL of MGIT medium containing polymyxin B, amphotericin B, nalidixic acid, trimethoprim and azlocillin (PANTA) (MGIT-PANTA) and the other was added to 7 mL of MGIT medium containing 0.8 mL of lysin (MGIT-Lysin). The samples were randomized and incubated at 37°C in the MGIT 960 system. The sensitivity and specificity of MGIT-Lysin were 97% and 88%, respectively, as compared with MGIT-PANTA. The average times to detection with MGIT-Lysin and MGIT-PANTA were 9.3 and 8.6 days, respectively. The rate of contamination with MGIT-PANTA and MGIT-Lysin were 16% and 7.3%, respectively. Phage lysin can be substituted for antibiotics in processed sputum samples for the detection of M. tuberculosis.
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Affiliation(s)
- B Subramanyam
- Department of Bacteriology, Tuberculosis Research Centre (Indian Council of Medical Research), Mayor V. R. Ramanathan Road,Chetput, Chennai, Tamil Nadu, India
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Piersimoni C. Nontuberculous mycobacteria infection in solid organ transplant recipients. Eur J Clin Microbiol Infect Dis 2011; 31:397-403. [DOI: 10.1007/s10096-011-1329-4] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2011] [Accepted: 06/20/2011] [Indexed: 11/29/2022]
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Charles P, Lortholary O, Dechartres A, Doustdar F, Viard JP, Lecuit M, Gutierrez MC. Mycobacterium genavense infections: a retrospective multicenter study in France, 1996-2007. Medicine (Baltimore) 2011; 90:223-230. [PMID: 21694645 DOI: 10.1097/md.0b013e318225ab89] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Abstract
Mycobacterium genavense, a nontuberculous mycobacterium, led to devastating infections in patients with acquired immunodeficiency syndrome (AIDS) before highly active antiretroviral therapy (HAART) was available, as well as in other immunocompromised patients. We conducted the current study to describe the features of this infection in patients infected with human immunodeficiency virus (HIV) in the HAART era and in non HIV-infected patients.We conducted a retrospective cohort survey in France. All patients with M. genavense infection diagnosed from 1996 to 2007 at the National Reference Center, Institut Pasteur, Paris, were identified and their clinical, laboratory, and microbiologic data were centralized in a single database. Twenty-five cases of M. genavense infection originating from 19 centers were identified. Twenty patients had AIDS, 3 had solid organ transplantation, and 2 had sarcoidosis. Sixty-four percent (n = 16) were male, mean age was 42 years, and median CD4 count was 13/mm (range, 0-148/mm) in patients with AIDS. Twenty-four patients had disseminated infection with fever (75%, n = 18), weight loss (79%, n = 19), abdominal pain (71%, n = 17), diarrhea (62.5%, n = 15), splenomegaly (71%, n = 17), hepatomegaly (62.5%, n = 15), or abdominal adenopathy (62.5%, n = 15). M. genavense was isolated from the lymph node (n = 13), intestinal biopsy (n = 9), blood (n = 6), sputum (n = 3), stool (n = 3), and bone marrow (n = 5). Eleven patients (44%) died, 8 (32%) were considered cured with no residual symptoms, and 6 (24%) had chronic symptoms. The 1-year survival rate was 72%.The prognosis of M. genavense infection in HIV-infected patients has dramatically improved with HAART. Clinical presentations in HIV and non-HIV immunocompromised patients were similar.
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Affiliation(s)
- Pierre Charles
- From Université Paris Descartes, Hôpital Necker-Enfants Malades (APHP), Service des Maladies Infectieuses et Tropicales, Centre d'Infectiologie Necker-Pasteur (PC, OL, JPV, ML), Paris; Hôpital Foch, Service de Médecine Interne (PC), Suresnes; Institut Pasteur, Département Infection et Epidémiologie (OL, FD, ML, MCG), Paris; INSERM U 738, Hôpital Hôtel-Dieu, Centre d'Epidémiologie Clinique (APHP), Université Paris V (AD), Paris; Inserm (ML), Avenir U 604
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Doggett J, Strasfeld L. Disseminated Mycobacterium genavense with pulmonary nodules in a kidney transplant recipient: case report and review of the literature. Transpl Infect Dis 2011; 13:38-43. [DOI: 10.1111/j.1399-3062.2010.00545.x] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Griffith DE, Aksamit T, Brown-Elliott BA, Catanzaro A, Daley C, Gordin F, Holland SM, Horsburgh R, Huitt G, Iademarco MF, Iseman M, Olivier K, Ruoss S, von Reyn CF, Wallace RJ, Winthrop K. An official ATS/IDSA statement: diagnosis, treatment, and prevention of nontuberculous mycobacterial diseases. Am J Respir Crit Care Med 2007; 175:367-416. [PMID: 17277290 DOI: 10.1164/rccm.200604-571st] [Citation(s) in RCA: 3927] [Impact Index Per Article: 231.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
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Trueba F, Fabre M, Saint-Blancard P. Rapid identification of Mycobacterium genavense with a new commercially available molecular test, INNO-LiPA MYCOBACTERIA v2. J Clin Microbiol 2004; 42:4403-4. [PMID: 15365056 PMCID: PMC516359 DOI: 10.1128/jcm.42.9.4403-4404.2004] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
We report a rare mesenteric localized Mycobacterium genavense infection in a severely immunocompromised human immunodeficiency virus-infected patient. An INNO-LiPA MYCOBACTERIA v2 test was performed directly on biopsy samples. This new molecular tool could be used for simultaneous identification of mycobacterium species from human specimens, but other studies are needed to validate our first results.
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Affiliation(s)
- François Trueba
- Department of Clinical Microbiology, Percy Hospital, 101 avenue Henri Barbusse, 92141 Clamart cedex, France.
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Abstract
It is likely that the incidence of infection by environmental opportunistic mycobacteria will continue to rise. Part of the rise will be caused by the increased awareness of these microbes as human pathogens and improvements in methods of detection and culture. Clinicians and microbiologists will continue to be challenged by the introduction of new species to the already long list of mycobacterial opportunists (see Table 3). The incidence of infection will also rise because an increasing proportion of the population is aging or subject to some type of immunosuppression. A second reason for an increase in the incidence of environmental mycobacterial infection is that these microbes are everywhere. They are present in water, biofilms, soil, and aerosols. They are natural inhabitants of the human environment, especially drinking water distribution systems. Thus, it is likely that everyone is exposed on a daily basis. It is likely that certain human activities can lead to selection of mycobacteria. Important lessons have been taught by study of cases of hypersensitivity pneumonitis associated with exposure to metalworking fluid. First, the implicated metalworking fluids contained water, the likely source of the mycobacteria. Second, the metalworking fluids contain hydrocarbons (e.g., pine oils) and biocides (e.g., morpholine) both of which are substrates for the growth of mycobacteria [53,193]. Third, outbreak of disease followed disinfection of the metalworking fluid [136,137]. Although the metalworking fluid was contaminated with microorganisms, it was only after disinfection that symptoms developed in the workers. Because mycobacteria are resistant to disinfectants, it is likely that the recovery of the mycobacteria from the metalworking fluid [137] was caused by their selection. Disinfection may also contribute, in part, to the persistence of M avium and M intracellulare in drinking water distribution systems [33,89,240]. M avium and M intracellulare are many times more resistant to chlorine, chloramine, chlorine dioxide, and ozone than are other water-borne microorganisms [141,236]. Consequently, disinfection of drinking water results in selection of mycobacteria. In the absence of competitors, even the slowly growing mycobacteria can grow in the distribution system [33]. It is likely that hypersensitivity pneumonitis in lifeguards and therapy pool attendants [139] is caused by a similar scenario.
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Affiliation(s)
- Joseph O Falkinham
- Department of Biology, Fralin Biotechnology Center, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061-0346, USA.
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Brown-Elliott BA, Griffith DE, Wallace RJ. Newly described or emerging human species of nontuberculous mycobacteria. Infect Dis Clin North Am 2002; 16:187-220. [PMID: 11917813 DOI: 10.1016/s0891-5520(03)00052-7] [Citation(s) in RCA: 69] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The advent of molecular testing in the laboratory has brought about the recognition of multiple newly characterized mycobacterial species not previously recognizable with most standard techniques. Some of the species are nonpathogenic, but the majority may cause clinical disease. Each is likely to have its own biology, drug susceptibility pattern, and response to drug/surgical therapy. Thus, it is important to try to recognize these new species in the laboratory. A study of the phenotypic and genotypic characteristics of these new species also may help to elucidate the epidemiology and pathogenesis of these organisms. In addition, there are multiple emerging species of nontuberculous mycobacteria including M. ulcerans, M. haemophilum, M. xenopi, and M. malmoense. [table: see text] These species are being recognized increasingly as a cause of human disease and recovered within the laboratory. The clinician must learn about these new pathogens to recognize them clinically and assist the laboratory in their recovery.
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Affiliation(s)
- Barbara A Brown-Elliott
- Mycobacteria/Nocardia Laboratory, Department of Microbiology, University of Texas Health Center, Tyler, Texas, USA.
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Thomsen VO, Dragsted UB, Bauer J, Fuursted K, Lundgren J. Disseminated infection with Mycobacterium genavense: a challenge to physicians and mycobacteriologists. J Clin Microbiol 1999; 37:3901-5. [PMID: 10565904 PMCID: PMC85841 DOI: 10.1128/jcm.37.12.3901-3905.1999] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
In the present study we compared the clinical presentations of patients with a clinical diagnosis of AIDS and disseminated Mycobacterium genavense infection (n = 12) with those of patients with AIDS and disseminated M. avium complex (MAC) infection (n = 24). Abdominal pain was seen more frequently in the group of patients infected with M. genavense than in patients infected with MAC (P = 0. 003). Analysis of microbiological data revealed that stool specimens from patients infected with M. genavense were more often smear positive than stool specimens from patients infected with MAC (P = 0. 00002). However, M. genavense could be cultured on solid media from only 15.4% of the stool specimens, whereas MAC could be cultured from 71.4% of the specimens. Bone marrow and liver biopsy specimens yielded growth of M. genavense within a reasonably short time, allowing species identification by DNA technology. Microbiological data clearly demonstrated the importance of acidic liquid medium for primary culture, the avoidance of pretreatment and the use of additives in culture, and the necessity for prolonged incubation if M. genavense is suspected. Susceptibility testing showed that M. genavense is sensitive to rifamycins, fluoroquinolones, and macrolides, whereas it is resistant to isoniazid. Susceptibility to ethambutol and clofazimine could not be evaluated. The mean survival times of patients in the two groups were similar.
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Affiliation(s)
- V O Thomsen
- Department of Mycobacteriology, Statens Serum Institut, Copenhagen, Denmark.
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Realini L, De Ridder K, Hirschel B, Portaels F. Blood and charcoal added to acidified agar media promote the growth of Mycobacterium genavense. Diagn Microbiol Infect Dis 1999; 34:45-50. [PMID: 10342107 DOI: 10.1016/s0732-8893(99)00014-0] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Ten different agar media were tested for the in vitro growth of Mycobacterium genavense in primary cultures and in subcultures from BACTEC vials. These agar media were based on Middlebrook 7H9, 7H10 and 7H11, and supplemented with additives: mycobactin J, yeast extract, charcoal, or defibrinated sheep blood. Some media were acidified with phosphoric acid to a final pH of 6.2 +/- 0.2. Fourteen M. genavense strains from nude mouse organs as well as one decontaminated clinical specimen (from a bird) were tested. The optimal medium for primary cultures of M. genavense was Middlebrook 7H11 acidified to pH 6.2 +/- 0.2 and supplemented with charcoal and sheep blood: on this medium, all strains produced colonies within 6-12 weeks of incubation in numbers approaching the number of bacilli inoculated. It was also the only medium to support the growth of the decontaminated clinical specimen. Added blood and charcoal appeared not as essential for subcultures as for primary cultures. Three media supported the growth of all strains within 1 month incubation: they were acidified, and were supplemented with yeast extract or pancreatic digest of casein, and with either blood or charcoal.
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Affiliation(s)
- L Realini
- Department of Microbiology, Mycobacteriology Unit, Institute of Tropical Medicine, Antwerp, Belgium
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Realini L, De Ridder K, Palomino J, Hirschel B, Portaels F. Microaerophilic conditions promote growth of Mycobacterium genavense. J Clin Microbiol 1998; 36:2565-70. [PMID: 9705393 PMCID: PMC105163 DOI: 10.1128/jcm.36.9.2565-2570.1998] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Our studies show that microaerophilic conditions promote the growth of Mycobacterium genavense in semisolid medium. The growth of M. genavense at 2.5 or 5% oxygen was superior to that obtained at 21% oxygen in BACTEC primary cultures (Middlebrook 7H12, pH 6.0, without additives). By using nondecontaminated specimens, it was possible to detect growth with very small inocula (25 bacilli/ml) of 12 different M. genavense strains (from nude mice) within 6 weeks of incubation under low oxygen tension; conversely, with 21% oxygen, no growth of 8 of 12 (66.7%) M. genavense strains was detected (growth index, <10). The same beneficial effect of 2.5 or 5% oxygen was observed in primary cultures of a decontaminated clinical specimen. Low oxygen tension (2.5 or 5%) is recommended for the primary isolation of M. genavense. Microaerophilic cultivation of other atypical mycobacteria, especially slow-growing (e.g., Mycobacterium avium) and difficult-to-grow (e.g., Mycobacterium ulcerans) species, is discussed.
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Affiliation(s)
- L Realini
- Mycobacteriology Unit, Department of Microbiology, Institute of Tropical Medicine, Antwerp, Belgium.
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Tortoli E, Brunello F, Cagni AE, Colombrita D, Dionisio D, Grisendi L, Manfrin V, Moroni M, Passerini Tosi C, Pinsi G, Scarparo C, Simonetti MT. Mycobacterium genavense in AIDS patients, report of 24 cases in Italy and review of the literature. Eur J Epidemiol 1998; 14:219-24. [PMID: 9663512 DOI: 10.1023/a:1007401305708] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Mycobacterium genavense is a frequently missed agent of disseminated disease in AIDS patients. The increasing frequency with which such organism is being isolated in Italy suggested a comparison of local survey with data reported in literature. Isolates presumed to belong to the species M. genavense were centralized and identified by means of genomic sequencing and/or HPLC analysis of cell wall mycolic acids; clinical data were obtained from relevant patients' record and collected using a proper questionnaire. In 24 cases in which this organism has been isolated in Italy M. genavense was grown, prevalently from blood, in liquid medium after an average of six weeks of incubation. In overwhelming majority, patients were males, presented other opportunistic diseases and were characterized by very low CD4+ counts (average 23/microl); most frequent symptoms were fever, anemia and weight loss. All but two patients, who died before the mycobacterial infection was diagnosed, were treated with at least three drugs; the mean survival was close to one year. A review of literature reports revealed a wide overlapping of clinical and microbiological features.
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Affiliation(s)
- E Tortoli
- Laboratorio di Microbiologia e Virologia, Ospedale di Careggi, Firenze, Italy.
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