The incidence of Mycobacterium avium complex pulmonary disease (MACPD) has been globally increasing. The present study aims to provide a comprehensive analysis of clinical characteristics and treatment response among ...The incidence of Mycobacterium avium complex pulmonary disease (MACPD) has been globally increasing. The present study aims to provide a comprehensive analysis of clinical characteristics and treatment response among patients in the Amazon region of Brazil and conduct a retrospective cohort study at a prominent referral hospital in the State of Par, Brazil, from 2012 to 2020. The M. avium group represented 58.9% of cases, followed by M. intracellulare (35.7%), M. colombiense (3.6%), and M. chimaera (1.8%). The majority of patients (73.2%) were female and with an average age of 63 years. Primary clinical manifestations included persistent cough and sputum production. The Charlson comorbidity index (CCI) averaged 2.47, with 36.3% of patients having a CCI score equal to higher than 3. Notably, over 70% of patients had received treatment for pulmonary tuberculosis before initiating treatment for MAC infection. The fibrocavitary radiologic form was the most prevalent (55.4%), frequently exhibiting a bilateral distribution (53.6%). Antimicrobial susceptibility revealed a significant prevalence of MAC resistance to drugs in the therapeutic regimen. Despite this, most of the patients experienced clinical improvement (50%). In conclusion, this study highlights a higher prevalence of MAC infections among middle-aged women, with a history of pulmonary tuberculosis treatment and presenting the fibrocavitary radiological form was predominant.展开更多
AIM:To examine the detection rate of viable Mycobacterium avium subspecies paratuberculosis(MAP) in patients with inflammatory bowel disease [Crohn's disease(CD) and ulcerative colitis(UC)].METHODS:Thirty patients...AIM:To examine the detection rate of viable Mycobacterium avium subspecies paratuberculosis(MAP) in patients with inflammatory bowel disease [Crohn's disease(CD) and ulcerative colitis(UC)].METHODS:Thirty patients with CD(15 with at least one NOD2/CARD15 mutation),29 with UC,and 10 with no inflammatory bowel disease(IBD).were tested for MAP by polymerase chain reaction(specific IS900 fragment) and blood culture.RESULTS:MAP DNA was detected in all original blood samples and 8-wk blood cultures(CD,UC and non-IBD).Positive MAP DNA status was confirmed by dot blot assays.All 69 cultures were negative by acid-fast Ziehl-Neelsen staining.Viable MAP,in spheroplast form,was isolated from the 18-mo blood cultures of all 30 CD patients,one UC patient,and none of the non-IBD controls.No association was found between positive MAP cultures and use of immunosuppressive drugs or CDassociated single nucleotide polymorphisms.CONCLUSION:MAP is widely present in our area and MAP DNA can be recovered from the blood of CD,UC and non-IBD patients.However,MAP spheroplasts were only found in CD patients.展开更多
We report two cases of pulmonary sequestration infected with nontuberculous mycobacteria(NTM): Mycobacterium avium and Mycobacterium abscessus.Chest computed tomography showed pneumonic consolidation in the right lowe...We report two cases of pulmonary sequestration infected with nontuberculous mycobacteria(NTM): Mycobacterium avium and Mycobacterium abscessus.Chest computed tomography showed pneumonic consolidation in the right lower lobe,which received a systemic blood supply from the descending aorta in both patients.Video-assisted thoracoscopic surgeries were successfully performed and pathologica]examinations revealed multiple caseating granulomas.A review of the literature revealed only seven previous case reports of pulmonary sequestration infected with NTM,and no case with Mycobacterium abscessus has been reported.展开更多
Paratuberculosis is a chronic wasting disease of granulomatous enteritis in ruminants caused by Mycobacterium avium subsp.paratuberculosis(M.paratuberculosis,MAP)resulting in heavy economic losses to dairy industries ...Paratuberculosis is a chronic wasting disease of granulomatous enteritis in ruminants caused by Mycobacterium avium subsp.paratuberculosis(M.paratuberculosis,MAP)resulting in heavy economic losses to dairy industries worldwide.Currently,commercial vaccines were not effective in preventing pathogen shedding and were reported with serious side effects.To develop a novel and smarter paratuberculosis vaccine,we utilized PLGA nanoparticles encapsulating the Bfra antigen(Bfra-PLGA NPs).We observed that mice vaccinated with Bfra-PLGA NPs exhibited an enhanced secretory IFN-γ,CD4+T cells response and antibody IgG against MAP infection.In addition,secretions of the inflammatory cytokine TNF-αand IL-10 were increased following treatment with Bfra-PLGA NPs.A significant reduction in bacterial load was observed in the livers and spleens of animals vaccinated with Bfra-PLGA NPs.Furthermore,Bfra-PLGA NPs were effective to alleviate the pathological lesions of livers in mice.Overall,our approach provides a rational basis for employing PLGA nanoparticles to develop improved vaccines that induced protective immunity against paratuberculosis.展开更多
The hypothesis postulating that Mycobacterium avium paratuberculosis(MAP) is the cause of Crohn's disease(CD) has been circulating for many years.Advances in molecular techniques,such as polymerase chain reaction ...The hypothesis postulating that Mycobacterium avium paratuberculosis(MAP) is the cause of Crohn's disease(CD) has been circulating for many years.Advances in molecular techniques,such as polymerase chain reaction and culture methods,have enabled researchers to demonstrate that there is an association between MAP and CD.Recently,genome-wide association studies have identified novel susceptibility genes for CD,which are critical for generation of an adaptive immune response that is protective against intracellular pathogens,including M.tuberculosis infection.However,the role of MAP as a cause of CD suffered a setback with the report that administration of antimycobacterial therapy failed to lead to a sustained response in CD patients.Accordingly,this review sought neither to confirm nor refute this,but instead to survey recent literature on the role of MAP in CD.展开更多
Mycobacterium avium subspecies paratuberculosis(MAP),originally called Johne’s bacillus was firstdescribed from Germany in 1895 as the cause of achronic inflammatory disease of the intestine in acow.As the 20th centu...Mycobacterium avium subspecies paratuberculosis(MAP),originally called Johne’s bacillus was firstdescribed from Germany in 1895 as the cause of achronic inflammatory disease of the intestine in acow.As the 20th century progressed,clinical andsub-clinical MAP infection in farm animals inWestern Europe appeared to become moreprevalent.Among the early reviews available展开更多
Objective:To estimate the prevalence of Mycobacterium tuberculosis(M.tuberculosis) and Mycobacterium avium(M.avium) infections in HIV -positive patients suspected to have puimonar) and extrapulmonary mycobacterial co-...Objective:To estimate the prevalence of Mycobacterium tuberculosis(M.tuberculosis) and Mycobacterium avium(M.avium) infections in HIV -positive patients suspected to have puimonar) and extrapulmonary mycobacterial co-infection using PCR technique.Methods: Totally 50 samples comprising sputum,pleural fluid and CSF taken from HIV positive patients suspected to have mycobacterial infection,were processed.The demographic information and results of acid fast staining and culture were recorded for each patient.The PCR for detecting of M.tuberculosis comprised of specific primers targeting IS6110 gene sequence.For detecting of M.avium,PCR with primers that amplifies the mig gene were used.Results:From 50 samples processed,45 were sputum(90%),3 pleural fluid(6%) and 2 CSK(4%).In total.8(16%) were culture positive,7 had positive acid fast staining 114%) and 13 samples(26%)were positive using PCR technique.All the positive samples were sputum and belonged to patients with pulmonary infection.01 these.9 were positive for M.tuberculosis(69.2%) and 4 were identified as 1/.avium (30.8%).which 2 out of 13 positive samples showed mixed infections by both mycobacteria. Conclusions:The PCR shows the highest detection rate(26%) of mycobacteria compared with culture and acid last staining.The majority of infections were with M.tuberculosis(18%) and this shows the importance of this mycobacterial co-infection in HIV positive patients in the region of study.展开更多
Lady Windermere Syndrome is an uncommon pulmonary disease characteristically observed in elderly white females with chronic cough suppression and dyspnea. It is classically associated with Mycobacterium avium complex ...Lady Windermere Syndrome is an uncommon pulmonary disease characteristically observed in elderly white females with chronic cough suppression and dyspnea. It is classically associated with Mycobacterium avium complex (MAC) species. An 84-year-old female was evaluated for longstanding non-productive cough and intermittent dyspnea. A chest computed tomography scan revealed densities in the right upper lobe and scattered nodular-cystic bronchiectasis. Biopsy was negative for malignancy;however, bronchioalveolar lavage studies showed presence of MAC. Patient was treated with a 12-month course of azithromycin, rifampin and ethambutol resulting in resolution of her symptoms.展开更多
文摘The incidence of Mycobacterium avium complex pulmonary disease (MACPD) has been globally increasing. The present study aims to provide a comprehensive analysis of clinical characteristics and treatment response among patients in the Amazon region of Brazil and conduct a retrospective cohort study at a prominent referral hospital in the State of Par, Brazil, from 2012 to 2020. The M. avium group represented 58.9% of cases, followed by M. intracellulare (35.7%), M. colombiense (3.6%), and M. chimaera (1.8%). The majority of patients (73.2%) were female and with an average age of 63 years. Primary clinical manifestations included persistent cough and sputum production. The Charlson comorbidity index (CCI) averaged 2.47, with 36.3% of patients having a CCI score equal to higher than 3. Notably, over 70% of patients had received treatment for pulmonary tuberculosis before initiating treatment for MAC infection. The fibrocavitary radiologic form was the most prevalent (55.4%), frequently exhibiting a bilateral distribution (53.6%). Antimicrobial susceptibility revealed a significant prevalence of MAC resistance to drugs in the therapeutic regimen. Despite this, most of the patients experienced clinical improvement (50%). In conclusion, this study highlights a higher prevalence of MAC infections among middle-aged women, with a history of pulmonary tuberculosis treatment and presenting the fibrocavitary radiological form was predominant.
基金Supported by A grant from Fundación de Investigación Médica Mutua Madrilena(FMM)(to Díaz-Rubio M)
文摘AIM:To examine the detection rate of viable Mycobacterium avium subspecies paratuberculosis(MAP) in patients with inflammatory bowel disease [Crohn's disease(CD) and ulcerative colitis(UC)].METHODS:Thirty patients with CD(15 with at least one NOD2/CARD15 mutation),29 with UC,and 10 with no inflammatory bowel disease(IBD).were tested for MAP by polymerase chain reaction(specific IS900 fragment) and blood culture.RESULTS:MAP DNA was detected in all original blood samples and 8-wk blood cultures(CD,UC and non-IBD).Positive MAP DNA status was confirmed by dot blot assays.All 69 cultures were negative by acid-fast Ziehl-Neelsen staining.Viable MAP,in spheroplast form,was isolated from the 18-mo blood cultures of all 30 CD patients,one UC patient,and none of the non-IBD controls.No association was found between positive MAP cultures and use of immunosuppressive drugs or CDassociated single nucleotide polymorphisms.CONCLUSION:MAP is widely present in our area and MAP DNA can be recovered from the blood of CD,UC and non-IBD patients.However,MAP spheroplasts were only found in CD patients.
基金supported by Mid-career Researcher Program through NRF grant funded by the MEST(2011-0015546)
文摘We report two cases of pulmonary sequestration infected with nontuberculous mycobacteria(NTM): Mycobacterium avium and Mycobacterium abscessus.Chest computed tomography showed pneumonic consolidation in the right lower lobe,which received a systemic blood supply from the descending aorta in both patients.Video-assisted thoracoscopic surgeries were successfully performed and pathologica]examinations revealed multiple caseating granulomas.A review of the literature revealed only seven previous case reports of pulmonary sequestration infected with NTM,and no case with Mycobacterium abscessus has been reported.
基金supported by"National Key Research and Development Program(Project No.2021YFD1800405)""National Natural Science Foundation of China(Project No.31873005,No.32172800)""China Agriculture Research System(No.CARS-36)".
文摘Paratuberculosis is a chronic wasting disease of granulomatous enteritis in ruminants caused by Mycobacterium avium subsp.paratuberculosis(M.paratuberculosis,MAP)resulting in heavy economic losses to dairy industries worldwide.Currently,commercial vaccines were not effective in preventing pathogen shedding and were reported with serious side effects.To develop a novel and smarter paratuberculosis vaccine,we utilized PLGA nanoparticles encapsulating the Bfra antigen(Bfra-PLGA NPs).We observed that mice vaccinated with Bfra-PLGA NPs exhibited an enhanced secretory IFN-γ,CD4+T cells response and antibody IgG against MAP infection.In addition,secretions of the inflammatory cytokine TNF-αand IL-10 were increased following treatment with Bfra-PLGA NPs.A significant reduction in bacterial load was observed in the livers and spleens of animals vaccinated with Bfra-PLGA NPs.Furthermore,Bfra-PLGA NPs were effective to alleviate the pathological lesions of livers in mice.Overall,our approach provides a rational basis for employing PLGA nanoparticles to develop improved vaccines that induced protective immunity against paratuberculosis.
基金Supported by Grant from Fundación de Investigación MédicaMutua Madrileía (Professor M Díaz-Rubio)
文摘The hypothesis postulating that Mycobacterium avium paratuberculosis(MAP) is the cause of Crohn's disease(CD) has been circulating for many years.Advances in molecular techniques,such as polymerase chain reaction and culture methods,have enabled researchers to demonstrate that there is an association between MAP and CD.Recently,genome-wide association studies have identified novel susceptibility genes for CD,which are critical for generation of an adaptive immune response that is protective against intracellular pathogens,including M.tuberculosis infection.However,the role of MAP as a cause of CD suffered a setback with the report that administration of antimycobacterial therapy failed to lead to a sustained response in CD patients.Accordingly,this review sought neither to confirm nor refute this,but instead to survey recent literature on the role of MAP in CD.
文摘Mycobacterium avium subspecies paratuberculosis(MAP),originally called Johne’s bacillus was firstdescribed from Germany in 1895 as the cause of achronic inflammatory disease of the intestine in acow.As the 20th century progressed,clinical andsub-clinical MAP infection in farm animals inWestern Europe appeared to become moreprevalent.Among the early reviews available
基金supported by a grant(No.87101) from Ahvaz Jundishapur University of Medical Sciences,Ahvaz,Iran.Special thanks to research affairs,of the university for their continue support
文摘Objective:To estimate the prevalence of Mycobacterium tuberculosis(M.tuberculosis) and Mycobacterium avium(M.avium) infections in HIV -positive patients suspected to have puimonar) and extrapulmonary mycobacterial co-infection using PCR technique.Methods: Totally 50 samples comprising sputum,pleural fluid and CSF taken from HIV positive patients suspected to have mycobacterial infection,were processed.The demographic information and results of acid fast staining and culture were recorded for each patient.The PCR for detecting of M.tuberculosis comprised of specific primers targeting IS6110 gene sequence.For detecting of M.avium,PCR with primers that amplifies the mig gene were used.Results:From 50 samples processed,45 were sputum(90%),3 pleural fluid(6%) and 2 CSK(4%).In total.8(16%) were culture positive,7 had positive acid fast staining 114%) and 13 samples(26%)were positive using PCR technique.All the positive samples were sputum and belonged to patients with pulmonary infection.01 these.9 were positive for M.tuberculosis(69.2%) and 4 were identified as 1/.avium (30.8%).which 2 out of 13 positive samples showed mixed infections by both mycobacteria. Conclusions:The PCR shows the highest detection rate(26%) of mycobacteria compared with culture and acid last staining.The majority of infections were with M.tuberculosis(18%) and this shows the importance of this mycobacterial co-infection in HIV positive patients in the region of study.
文摘Lady Windermere Syndrome is an uncommon pulmonary disease characteristically observed in elderly white females with chronic cough suppression and dyspnea. It is classically associated with Mycobacterium avium complex (MAC) species. An 84-year-old female was evaluated for longstanding non-productive cough and intermittent dyspnea. A chest computed tomography scan revealed densities in the right upper lobe and scattered nodular-cystic bronchiectasis. Biopsy was negative for malignancy;however, bronchioalveolar lavage studies showed presence of MAC. Patient was treated with a 12-month course of azithromycin, rifampin and ethambutol resulting in resolution of her symptoms.
