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1.
Mycoses ; 67(9): e13790, 2024 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-39278818

RESUMEN

BACKGROUND AND OBJECTIVES: Candidaemia is a potentially life-threatening emergency in the intensive care units (ICUs). Surveillance using common protocols in a large network of hospitals would give meaningful estimates of the burden of candidaemia and central line associated candidaemia in low resource settings. We undertook this study to understand the burden and epidemiology of candidaemia in multiple ICUs of India, leveraging the previously established healthcare-associated infections (HAI) surveillance network. Our aim was also to assess the impact that the pandemic of COVID-19 had on the rates and associated mortality of candidaemia. METHODS: This study included adult patients from 67 Indian ICUs in the AIIMS-HAI surveillance network that conducted BSI surveillance in COVID-19 and non-COVID-19 ICUs during and before the COVID-19 pandemic periods. Hospitals identified healthcare-associated candidaemia and central line associated candidaemia and reported clinical and microbiological data to the network as per established and previously published protocols. RESULTS: A total of 401,601 patient days and 126,051 central line days were reported during the study period. A total of 377 events of candidaemia were recorded. The overall rate of candidaemia in our network was 0.93/1000 patient days. The rate of candidaemia in COVID-19 ICUs (2.52/1000 patient days) was significantly higher than in non-COVID-19 ICUs (1.05/patient days) during the pandemic period. The rate of central line associated candidaemia in COVID-19 ICUs (4.53/1000 central line days) was also significantly higher than in non-COVID-19 ICUs (1.73/1000 central line days) during the pandemic period. Mortality in COVID-19 ICUs associated with candidaemia (61%) was higher than that in non-COVID-19 ICUs (41%). A total of 435 Candida spp. were isolated. C. tropicalis (26.7%) was the most common species. C. auris accounted for 17.5% of all isolates and had a high mortality. CONCLUSION: Patients in ICUs with COVID-19 infections have a much higher risk of candidaemia, CLAC and its associated mortality. Network level data helps in understanding the true burden of candidaemia and will help in framing infection control policies for the country.


Asunto(s)
COVID-19 , Candidemia , Infección Hospitalaria , Unidades de Cuidados Intensivos , Humanos , COVID-19/epidemiología , Candidemia/epidemiología , India/epidemiología , Unidades de Cuidados Intensivos/estadística & datos numéricos , Masculino , Persona de Mediana Edad , Femenino , Adulto , Infección Hospitalaria/epidemiología , SARS-CoV-2 , Anciano , Infecciones Relacionadas con Catéteres/epidemiología , Infecciones Relacionadas con Catéteres/microbiología , Pandemias
2.
Indian J Med Microbiol ; 51: 100665, 2024.
Artículo en Inglés | MEDLINE | ID: mdl-38986772

RESUMEN

PURPOSE: Tuberculous meningitis (TBM) is the most severe form of tuberculosis (TB). Difficulty in diagnosing the condition along with other factors, increases its potential for high morbidity and mortality. Targeted Next Generation Sequencing (tNGS) generates high quality sequence read depths, enabling the identification of low-frequency alleles linked to Drug resistance (DR). The paucibacillary nature of tuberculous meningitis is a challenge for making a definitive diagnosis. METHODS: tNGS was performed on 20 cerebrospinal fluid (CSF) samples where, MGIT has shown Positive MTB Cultures. We simultaneously performed pyrosequencing (PSQ) and phenotypic Drug susceptibility testing (pDST) for these 20 samples. RESULTS: Sequencing results (from tNGS and PSQ) were compared with reference standards i.e. pDST. tNGS detected MTB in 7/20 (35%) CSF samples whereas, PSQ detected MTB in 17/20 (85%). CONCLUSION: Although tNGS has ability to detect minority variants along with detection of additional targets than PSQ, PSQ remains the diagnostic choice in our tertiary lab.


Asunto(s)
Secuenciación de Nucleótidos de Alto Rendimiento , Pruebas de Sensibilidad Microbiana , Mycobacterium tuberculosis , Tuberculosis Meníngea , Tuberculosis Resistente a Múltiples Medicamentos , Humanos , Tuberculosis Meníngea/diagnóstico , Tuberculosis Meníngea/microbiología , Secuenciación de Nucleótidos de Alto Rendimiento/métodos , Mycobacterium tuberculosis/genética , Mycobacterium tuberculosis/efectos de los fármacos , Tuberculosis Resistente a Múltiples Medicamentos/diagnóstico , Tuberculosis Resistente a Múltiples Medicamentos/microbiología , Tuberculosis Resistente a Múltiples Medicamentos/líquido cefalorraquídeo , Pruebas de Sensibilidad Microbiana/métodos , Antituberculosos/farmacología , Líquido Cefalorraquídeo/microbiología
3.
Microbiol Spectr ; 12(8): e0078124, 2024 Aug 06.
Artículo en Inglés | MEDLINE | ID: mdl-38920376

RESUMEN

Primary cerebral phaeohyphomycosis is a life-threatening disease caused by neurotropic dematiaceous fungi. At present, there are no consensus guidelines regarding optimal antifungal therapy in such cases. Generally, a combination of antifungal agents is recommended for treatment. However, the activities of antifungal combinations against these fungi have not been investigated. In this study, we evaluated the in vitro activities of 13 double and five triple antifungal combinations against clinical isolates of Cladophialophora bantiana (n = 7), Fonsecaea monophora (n = 2), and Cladosporium cladosporioides (n = 1), using a simplified checkerboard procedure. The minimum inhibitory concentrations (MICs) of nine antifungal drugs were determined by the broth microdilution method, and the interaction between antifungal agents in each combination was assessed by the fractional inhibitory concentration index. Excellent activity was observed for posaconazole and itraconazole. Flucytosine had potent activity against C. bantiana but was ineffective against F. monophora, and C. cladosporioides. The echinocandins demonstrated high MICs for all the isolates. Synergistic interactions were observed for all the double combinations, except when itraconazole was combined with either amphotericin B or flucytosine. The combination of amphotericin B with caspofungin showed synergistic interactions against 40% of the isolates. Antagonism was observed with isavuconazole-flucytosine combination against two C. bantiana isolates. The triple combinations of caspofungin and flucytosine with amphotericin B or posaconazole were synergistic against one isolate of F. monophora. For C. cladosporioides, synergy was observed for the triple combination of amphotericin B with caspofungin and flucytosine. Our results indicate that combination of caspofungin with amphotericin B or a triazole, with or without 5-flucytosine has great potential against neurotropic dematiaceous fungi.IMPORTANCEThis research uses a modified version of the checkerboard assay to standardize the in vitro testing of double and triple combinations of antifungal agents against neurotropic dematiaceous fungi. Antifungal combination therapy is associated with improved outcomes in cerebral phaeohyphomycosis. In this study, we demonstrate that posaconazole is the single most active antifungal drug against this group of fungi. The double combination of amphotericin B with caspofungin or a trizole, and the triple combinations of caspofungin and flucytosine with amphotericin B or posaconazole might hold promise in the treatment of cerebral phaeohyphomycosis. Our findings will guide in developing optimal therapeutic strategies for these refractory infections.


Asunto(s)
Antifúngicos , Feohifomicosis Cerebral , Sinergismo Farmacológico , Pruebas de Sensibilidad Microbiana , Antifúngicos/farmacología , Humanos , Feohifomicosis Cerebral/tratamiento farmacológico , Feohifomicosis Cerebral/microbiología , Ascomicetos/efectos de los fármacos , Cladosporium/efectos de los fármacos , Triazoles/farmacología , Quimioterapia Combinada , Flucitosina/farmacología , Itraconazol/farmacología , Equinocandinas/farmacología
4.
JMIR Res Protoc ; 13: e54672, 2024 Feb 16.
Artículo en Inglés | MEDLINE | ID: mdl-38363632

RESUMEN

BACKGROUND: Fungal infections are now a great public health threat, especially in those with underlying risk factors such as neutropenia, diabetes, high-dose steroid treatment, cancer chemotherapy, prolonged intensive care unit stay, and so on, which can lead to mycoses with higher mortality rates. The rates of these infections have been steadily increasing over the past 2 decades due to the increasing population of patients who are immunocompromised. However, the data regarding the exact burden of such infection are still not available from India. Therefore, this registry was initiated to collate systematic data on invasive fungal infections (IFIs) across the country. OBJECTIVE: The primary aim of this study is to create a multicenter digital clinical registry and monitor trends of IFIs and emerging fungal diseases, as well as early signals of any potential fungal outbreak in any region. The registry will also capture information on the antifungal resistance patterns and the contribution of fungal infections on overall morbidity and inpatient mortality across various conditions. METHODS: This multicenter, prospective, noninterventional observational study will be conducted by the Indian Council of Medical Research through a web-based data collection method from 8 Advanced Mycology Diagnostic and Research Centers across the country. Data on age, gender, clinical signs and symptoms, date of admission, date of discharge or death, diagnostic tests performed, identified pathogen details, antifungal susceptibility testing, outcome, and so on will be obtained from hospital records. Descriptive and multivariate statistical methods will be applied to investigate clinical manifestations, risk variables, and treatment outcomes. RESULTS: These Advanced Mycology Diagnostic and Research Centers are expected to find the hidden cases of fungal infections in the intensive care unit setting. The study will facilitate the enhancement of the precision of fungal infection diagnosis and prompt treatment modalities in response to antifungal drug sensitivity tests. This registry will improve our understanding of IFIs, support evidence-based clinical decision-making ability, and encourage public health policies and actions. CONCLUSIONS: Fungal diseases are a neglected public health problem. Fewer diagnostic facilities, scanty published data, and increased vulnerable patient groups make the situation worse. This is the first systematic clinical registry of IFIs in India. Data generated from this registry will increase our understanding related to the diagnosis, treatment, and prevention of fungal diseases in India by addressing pertinent gaps in mycology. This initiative will ensure a visible impact on public health in the country. INTERNATIONAL REGISTERED REPORT IDENTIFIER (IRRID): DERR1-10.2196/54672.

5.
J Fungi (Basel) ; 10(1)2024 Jan 05.
Artículo en Inglés | MEDLINE | ID: mdl-38248951

RESUMEN

A well-structured digital database is essential for any national priority project as it can provide real-time data analysis and facilitate quick decision making. In recent times, particularly after the COVID-19 pandemic, invasive fungal infections (IFIs) have emerged as a significant public health challenge in India, affecting vulnerable population, including immunocompromised individuals. The lack of comprehensive and well-structured data on IFIs has hindered efforts to understand their true burden and optimize patient care. To address this critical knowledge gap, the ICMR has undertaken a Pan-India pioneer initiative to develop a network of Advanced Mycology Diagnostic research centres in different geographical zones of the country (ICMR-MycoNet). Under the aegis of this project, a clinical registry on IFIs in the ICUs is initiated. This process paper presents a detailed account of the steps involved in the establishment of a web-based data entering and monitoring platform to capture data electronically, ensuring robust and secure data collection and management. This system not only allows participating ICMR-MycoNet centres to enter patient information directly into the database using standardized Case Report Form (CRF) but also includes data validation checks to ensure the accuracy and completeness of entered data. It is complemented by a real-time, web-based, and adaptable data visualization platform. This registry aims to provide crucial epidemiological insights, promote evidence-based hospital infection control programs, and ultimately improve patient outcomes in the face of this formidable healthcare challenge.

6.
Indian J Med Microbiol ; 48: 100519, 2024 Jan 02.
Artículo en Inglés | MEDLINE | ID: mdl-38029841
7.
Indian J Med Microbiol ; 46: 100430, 2023.
Artículo en Inglés | MEDLINE | ID: mdl-37945123

RESUMEN

Cerebral phaeohyphomycosis (CP) is a rare but a highly morbid fungal infection of the central nervous system caused by the fungi belonging to the order Chaetothyriales, which includes Cladophialophora bantiana, Exophiala dermatitidis, Rhinocladiella mackenziei (RM) etc. This disease is associated with poor clinical outcomes, with reported mortality of over 80%. We present the case of a 65-year gentleman who developed CP secondary to RM infection following COVID-19 and the associated challenges in his medical and surgical management.


Asunto(s)
COVID-19 , Infecciones Fúngicas del Sistema Nervioso Central , Feohifomicosis Cerebral , Micosis , Humanos , Feohifomicosis Cerebral/diagnóstico , Feohifomicosis Cerebral/tratamiento farmacológico , Feohifomicosis Cerebral/microbiología , Infecciones Fúngicas del Sistema Nervioso Central/diagnóstico , Infecciones Fúngicas del Sistema Nervioso Central/tratamiento farmacológico , Infecciones Fúngicas del Sistema Nervioso Central/microbiología , Micosis/tratamiento farmacológico , Antifúngicos/uso terapéutico
8.
Indian J Med Microbiol ; 46: 100466, 2023.
Artículo en Inglés | MEDLINE | ID: mdl-37945134

RESUMEN

A middle-aged uncontrolled diabetic with chronic kidney disease presented with high-grade fever, skin abscesses and cough for two weeks. His blood cultures grew Burkholderia pseudomallei. A few weeks prior, blood cultures drawn for PUO workup elsewhere grew an organism identified as Acinetobacter sp with an unusual susceptibility pattern. His fever responded to a short course of meropenem. In retrospect, the earlier blood culture had likely misidentified B.pseudomallei as Acinetobacter sp given the background history, risk factors and the peculiar susceptibility report. Through this case, we discuss important aspects of melioid diagnostics which may be clinically relevant to establish this diagnosis.


Asunto(s)
Acinetobacter , Burkholderia pseudomallei , Melioidosis , Persona de Mediana Edad , Humanos , Melioidosis/diagnóstico , Melioidosis/tratamiento farmacológico , Meropenem , Fiebre
9.
Indian J Med Microbiol ; 41: 111-113, 2023.
Artículo en Inglés | MEDLINE | ID: mdl-36192257

RESUMEN

A middle-aged recently diagnosed uncontrolled diabetic from Mumbai, India presented with fever and headache for 8 weeks. Two weeks prior to his symptoms, he travelled to Lonavala during the monsoons and gave history of indoor swimming in a chlorinated pool. Investigations showed isolated neurological involvement with multiple brain abscesses. Abscess cultures grew a non-lactose fermenter. Automated systems failed to identify it. After assessment of his background history and detailed microbiological analysis of the organism, specific investigations were requested which confirmed the suspected diagnosis of melioidosis. We report an unusual presentation of ceftazidime-resistant Burkholderia pseumodmallei as isolated neuromelioidosis with brain abscesses.


Asunto(s)
Absceso Encefálico , Burkholderia pseudomallei , Melioidosis , Masculino , Persona de Mediana Edad , Humanos , Ceftazidima , Melioidosis/diagnóstico , Combinación Trimetoprim y Sulfametoxazol , Absceso Encefálico/tratamiento farmacológico , Antibacterianos/uso terapéutico
10.
Int Orthop ; 46(5): 963-970, 2022 05.
Artículo en Inglés | MEDLINE | ID: mdl-35224669

RESUMEN

PURPOSE: Incidence of carbapenem-resistant Gram-negative infections has risen alarmingly all across the globe, both in developed and developing countries alike. The purpose of this study was to assess whether challenges of life-threatening infections with very high resistance pattern can be successfully addressed by a modified approach. METHODS: This is a retrospective study of 26 patients with osteoarticular and soft tissue infections with carbapenem-resistant Gram-negative bacilli treated between 2001 and 2017 with at least two year follow-up after stopping antibiotics. All were treated by a multispecialty team approach with primary aim of "source control at the earliest and avoiding recurrence at all cost". The protocol involved opting for early compromises especially in at "risk individuals", such as resorting to early amputations, especially if salvage meant multiple bony and soft tissue reconstructive procedures, explanation of prosthesis than staged revision, avoiding internal fixations, opting for shortest possible time in external fixators with reshaping and telescoping bone ends to get bony stability and increase surface area even if it meant compromising length. RESULTS: There were five amputations, two excision arthroplasty of hip, many minor but acceptable malunions and shortening. However, lives of 24/26 patients could be salvaged, much better than most of the published data. The two patients who died had peri-prosthetic joint infection after total hip arthroplasty and presented very late in sepsis and died within days of explantation. Infection remission could be achieved in remaining patients. CONCLUSION: These "risk to life" cases can be successfully treated by lowering the aims and expectations from "excellent function to salvage of life and infection remission". Therein lies the "success" in these complex high-risk cases.


Asunto(s)
Carbapenémicos , Infecciones de los Tejidos Blandos , Antibacterianos/uso terapéutico , Carbapenémicos/farmacología , Carbapenémicos/uso terapéutico , Bacterias Gramnegativas , Humanos , Estudios Retrospectivos , Infecciones de los Tejidos Blandos/tratamiento farmacológico , Infecciones de los Tejidos Blandos/epidemiología
11.
Indian J Crit Care Med ; 26(1): 53-61, 2022 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-35110845

RESUMEN

INTRODUCTION: Sepsis is a life-threatening condition caused due to dysregulated immune response to an infection and progressive immunosuppression. Reactivation of cytomegalovirus (CMV) occurs frequently in sepsis and is found associated with adverse outcomes. The study objective was to evaluate the association between incidence of CMV reactivation and immune alteration in sepsis-induced immunosuppression in patients with prolonged sepsis. PATIENTS AND METHODS: Patients admitted to intensive care unit (ICU), with severe sepsis and CMV immunoglobulin G (IgG) seropositivity, were prospectively enrolled. Other manifest immune suppression causes were excluded. Samples were collected on enrolment and further once a week until day 21 or death/discharge. CMV viral load was quantified using qPCR. Lymphocyte subset analysis (CD3+, CD4+, CD8+, CD19+, CD16+/CD56+, and CD25+CD127- regulatory T cells), human leukocyte antigen-DR isotype (HLA-DR) expression on monocytes, programmed death-1 (PD-1) expression on T lymphocytes, and proinflammatory (interleukin-6 (IL-6), tumor necrosis factor-alpha (TNF-α), and interferon-gamma (IFN-γ)), anti-inflammatory cytokines levels (IL-2, IL-4, and IL-10) were analyzed by flow cytometry as markers for immunosuppression. RESULTS: A total of 25 CMV IgG-positive patients and 11 healthy controls were included. CMV reactivation occurred in 20 patients. Patients with CMV reactivation had T-cell lymphopenia. PD-1 expression on CD4+ and CD8+ T cells was markedly elevated (p <0.02) in CMV-reactivated patients compared to nonreactivated patients. HLA-DR expression was significantly low on monocytes in all septic patients (p <0.01) compared to healthy controls. IL-6 levels showed elevation at day 7, whereas IL-10 was found to be significantly higher from day 0 in CMV-reactivated group. CONCLUSION: Our study concluded that immune suppression markers and cytokine levels in patients with severe sepsis were found to be significantly associated with the incidence of CMV reactivation. HOW TO CITE THIS ARTICLE: Lambe G, Mansukhani D, Khodaiji S, Shetty A, Rodrigues C, Kapadia F. Immune Modulation and Cytomegalovirus Reactivation in Sepsis-induced Immunosuppression: A Pilot Study. Indian J Crit Care Med 2022;26(1):53-61.

12.
Indian J Med Res ; 154(1): 85-89, 2021 07.
Artículo en Inglés | MEDLINE | ID: mdl-34782533

RESUMEN

Background & objectives: Linezolid (LZD) is increasingly being used in tuberculosis (TB) treatment. However, LZD resistance has already been reported, which is highly alarming, given its critical therapeutic role. This study was aimed to phenotypically and genotypically assess LZD resistance in Mycobacterium tuberculosis (MTB) isolates at a laboratory in a tertiary care centre in Mumbai, India. Methods: A sample of 32 consecutive LZD-resistant MTB isolates identified by liquid culture susceptibility testing was subjected to whole-genome sequencing (WGS) on the Illumina NextSeq platform. Sequences were analyzed using BioNumerics software to predict resistance for 12 antibiotics within 15 min. Results: Sixty eight of the 2179 isolates tested for LZD resistance by MGIT-based susceptibility testing (June 2015 to June 2016) were LZD-resistant. Thirty two consecutive LZD-resistant isolates were analyzed by WGS to screen for known mutations conferring LZD resistance. WGS of 32 phenotypically LZD-resistant isolates showed that C154R in the rplC gene and G2814T in the rrl gene were the major resistance determinants. Interpretation & conclusions: LZD resistance poses an important risk to the success of treatment regimens, especially those designed for resistant isolates; such regimens are extensively used in India. As LZD-containing regimens increase in prominence, it is important to support clinical decision-making with an improved understanding of the common mutations conferring LZD resistance and their frequency in different settings.


Asunto(s)
Mycobacterium tuberculosis , Tuberculosis Resistente a Múltiples Medicamentos , Antituberculosos/farmacología , Antituberculosos/uso terapéutico , Farmacorresistencia Bacteriana Múltiple , Humanos , Linezolid/farmacología , Linezolid/uso terapéutico , Pruebas de Sensibilidad Microbiana , Mutación , Mycobacterium tuberculosis/genética , Centros de Atención Terciaria , Tuberculosis Resistente a Múltiples Medicamentos/tratamiento farmacológico , Tuberculosis Resistente a Múltiples Medicamentos/epidemiología , Tuberculosis Resistente a Múltiples Medicamentos/genética
13.
Indian J Crit Care Med ; 25(Suppl 2): S122-S126, 2021 May.
Artículo en Inglés | MEDLINE | ID: mdl-34345124

RESUMEN

HIGHLIGHTS: (1) Blood culture is the gold standard for the diagnosis of bacterial infections. (2) Bone marrow culture is more sensitive than blood culture even in patients with enteric fever receiving antibiotics. (3) Microscopic agglutination test is considered the gold standard for diagnosing leptospirosis; however, now IgM ELISA and polymerase chain reaction (PCR) are more frequently used for diagnosis. (4) Tuberculosis is diagnosed with the help of nucleic acid amplification tests like Xpert MTB/RIF Ultra which also detects rifampicin resistance. Other tests include microscopy, Lowenstein-Jensen and mycobacteria growth indicator tube culture, line probe assay. (5) Tropical rickettsial infections are diagnosed by serological reactions (Weil-Felix, ELISA for antibodies) and PCR. (6) For Brucellosis culture from blood, bone marrow or tissue specimens remain the mainstay in diagnosis. (7) Dengue, Zika, Crimean-Congo hemorrhagic fever, Ebola, hantavirus, rabies are diagnosed with reverse transcriptase-polymerase chain reaction. Serological tests like IgM ELISA or paired sera samples for IgG are also used for diagnosis. HOW TO CITE THIS ARTICLE: Basu S, Shetty A. Laboratory Diagnosis of Tropical Infections. Indian J Crit Care Med 2021;25(Suppl 2):S122-S126.

14.
Tuberculosis (Edinb) ; 126: 102048, 2021 01.
Artículo en Inglés | MEDLINE | ID: mdl-33421910

RESUMEN

BACKGROUND: We evaluated the performance of pyrosequencing, a genotypic test which detects TB and XDR-defining mutations within 6 h, directly on CSF samples for diagnosing TB meningitis(TBM). METHODS: This retrospective, diagnostic accuracy study was conducted in Hinduja hospital, Mumbai from May-2017 to May-2019. 107 consecutive patients with physician-suspected TBM for whom CSF pyrosequencing was requested were screened. Seven patients with incomplete data were excluded. Diagnostic accuracy of pyrosequencing was compared with Xpert MTB/Rif and TBMGIT (TB Mycobacterial Growth Indicator Tube) culture against the uniform case definition of definite or probable TBM. Susceptibility concordance rate of pyrosequencing with TBMGIT culture and Xpert MTB/Rif was determined. RESULTS: The study cohort comprised of 100 patients[Definite(n = 33), Probable(n = 20), Possible(n = 30), Alternative(n = 17)] with 50% males[median age(years):38(Range:2-87)]. Against the uniform case definition, pyrosequencing had 98·11%(95%CI 89·93-99·95; n = 52/53) sensitivity and 97·79%(86·31-99·67; n = 44/45) negative predictive value(NPV) compared with 43.39%(29·83-57·72; n = 23/53,p < 0.0001) sensitivity and 61.04%(55·31-66·48; n = 47/77) NPV for Xpert MTB/Rif and 45·28%(31·56-59·55; n = 24/53,p < 0.0001) sensitivity and 61·84%(55·92-67·43; n = 47/76) NPV for TBMGIT culture. Susceptibility concordance rate of pyrosequencing with phenotypic Drug Susceptibility Testing was 91.3%(n = 21/23) and with Xpert MTB/Rif was 95·45%(n = 21/22). CONCLUSION: CSF pyrosequencing is significantly more sensitive than Xpert MTB/Rif and TBMGIT culture for diagnosing TBM. Additionally, it facilitates early therapeutic decision-making by providing information on XDR-defining mutations.


Asunto(s)
Líquido Cefalorraquídeo/metabolismo , Secuenciación de Nucleótidos de Alto Rendimiento/métodos , Mycobacterium tuberculosis/aislamiento & purificación , Tuberculosis Meníngea/líquido cefalorraquídeo , Tuberculosis Resistente a Múltiples Medicamentos/líquido cefalorraquídeo , Adolescente , Adulto , Anciano , Anciano de 80 o más Años , Líquido Cefalorraquídeo/microbiología , Niño , Preescolar , Femenino , Estudios de Seguimiento , Humanos , Masculino , Persona de Mediana Edad , Técnicas de Diagnóstico Molecular , Reproducibilidad de los Resultados , Estudios Retrospectivos , Tuberculosis Meníngea/diagnóstico , Tuberculosis Meníngea/microbiología , Tuberculosis Resistente a Múltiples Medicamentos/diagnóstico , Tuberculosis Resistente a Múltiples Medicamentos/microbiología , Adulto Joven
15.
Tuberculosis (Edinb) ; 127: 102051, 2021 03.
Artículo en Inglés | MEDLINE | ID: mdl-33450448

RESUMEN

BACKGROUND: Timely drug resistance detection is essential to global tuberculosis management. Unfortunately, rapid molecular tests assess resistance to only a few drugs, with culture required for comprehensive susceptibility test results. METHODS: We evaluated targeted next generation sequencing (tNGS) for tuberculosis on 40 uncultured sputum samples. Resistance profiles from tNGS were compared with profiles from Xpert MTB/RIF, line probe assay (LPA), pyrosequencing (PSQ), and phenotypic testing. Concordance, sensitivity, specificity, and overall test agreement were compared across assays. RESULTS: tNGS provided results for 39 of 40 samples (97.5%) with faster turnaround than phenotypic testing (median 3 vs. 21 days, p = 0.0068). Most samples were isoniazid and rifampin resistant (N = 31, 79.5%), 21 (53.8%) were fluoroquinolone resistant, and 3 (7.7%) were also resistant to Kanamycin. Half were of the Beijing lineage (N = 20, 51.3%). tNGS from uncultured sputum identified all resistance to isoniazid, rifampin, fluoroquinolones, and second-line injectable drugs that was identified by other methods. Agreement between tNGS and existing assays was excellent for isoniazid, rifampin, and SLDs, very good for levofloxacin, and good for moxifloxacin. CONCLUSION: tNGS can rapidly identify tuberculosis, lineage, and drug resistance with faster turnaround than phenotypic testing. tNGS is a potential alternative to phenotypic testing in high-burden settings.


Asunto(s)
Técnicas Bacteriológicas , ADN Bacteriano/genética , Farmacorresistencia Bacteriana/genética , Secuenciación de Nucleótidos de Alto Rendimiento , Pulmón/microbiología , Mycobacterium tuberculosis/genética , Tuberculosis Pulmonar/microbiología , Adolescente , Adulto , Antituberculosos/uso terapéutico , Estudios de Factibilidad , Femenino , Genotipo , Humanos , Masculino , Pruebas de Sensibilidad Microbiana , Persona de Mediana Edad , Mutación , Mycobacterium tuberculosis/efectos de los fármacos , Mycobacterium tuberculosis/crecimiento & desarrollo , Fenotipo , Valor Predictivo de las Pruebas , Esputo/microbiología , Tuberculosis Pulmonar/diagnóstico , Tuberculosis Pulmonar/tratamiento farmacológico , Adulto Joven
16.
J Infect Dev Ctries ; 14(9): 1033-1039, 2020 09 30.
Artículo en Inglés | MEDLINE | ID: mdl-33031093

RESUMEN

INTRODUCTION: Fungal osteoarticular/soft tissue infections (FOaSI) are an uncommon entity with protracted course due to variability in clinical picture, slow progression; resulting in misdiagnosis with empirical therapy. Recent studies have shown an alarming emergence of FOaSI in immunocompetent individuals with high mortality rates. This study recommends a protocol for managing these complex and confusing scenarios. METHODOLOGY: We have retrospectively analysed patients with FOaSI between January 2014 and December 2016, with a minimum 12 months follow up. RESULTS: 8 cases (6 male, 2 female) with a mean age of 42.88 years (26-53) presented to us 45 days (3-365) after initial symptoms. They underwent mean 3 procedures before being diagnosed with a fungal infection. Deep tissue cultures grew 9 fungi and 6 bacteria, commonest fungus being Candida sp (n = 4), treated with appropriate antifungals and antibiotics. Infection remission was achieved in 7/8 (87.5%) cases at 27.1 months (19-45) follow-up with 1 mortality. Excellent functional results as per our criteria were seen in 5 cases (62.5%) with 1 talus excision, 1 ray amputation and 1 mortality. CONCLUSIONS: This study highlights the significance of implementing a simple rule such as obtaining fungal cultures in every case of bone and soft tissue infections. Standardisation of treatment may not be the ideal solution, since different fungi have different growth patterns and invasiveness. A simple protocol of customising the medico- surgical treatment with an open ended discussion between the surgeons, microbiologists, pathologists and infectious disease specialists forms the cornerstone to success.


Asunto(s)
Antibacterianos/uso terapéutico , Antifúngicos/uso terapéutico , Osteomielitis/microbiología , Osteomielitis/terapia , Infecciones de los Tejidos Blandos/microbiología , Infecciones de los Tejidos Blandos/terapia , Adulto , Amputación Quirúrgica/métodos , Bacterias/efectos de los fármacos , Bacterias/aislamiento & purificación , Resultado Fatal , Femenino , Hongos/efectos de los fármacos , Hongos/aislamiento & purificación , Humanos , Masculino , Persona de Mediana Edad , Micosis/microbiología , Micosis/terapia , Estudios Retrospectivos , Resultado del Tratamiento
17.
Indian J Orthop ; 54(Suppl 1): 60-70, 2020 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-32952911

RESUMEN

BACKGROUND: In the era of increasing drug resistance in pulmonary tuberculosis (TB), it is prudent to assess causes of poor response to anti tubercular therapy (ATT) and drug sensitivity pattern (DSP) in osteoarticular TB. MATERIALS AND METHODS: As a part of Bombay Orthopaedic society's research project, members were asked to refer non responders to ATT to our institute. Cases were enrolled from October 2010 to March 2014. Deep tissue samples were obtained in all but five cases and subjected to a battery of tests including histopathology (HPE) and TB culture and sensitivity. The DSP was compared with the study performed by the principle author from 2004 to 2007 and published in 2009. RESULTS: 39 male and 50 female patients with a mean age of 24.85 years (2-66) were included and classified in four groups after results. (1) Culture and HPE positive-36. 24 had MDR and three XDR TB. Primary resistance to even second line drugs and deterioration of DSP since last study was noted, (2) culture negative and HPE positive-21. The cause of poor response was surgical in more than half cases, (3) non representative samples or lost to follow-up-15, (4) TB mimics-16. CONCLUSION: There is increasing incidence of primary resistance to second line drugs, primary resistance in children and worsening of resistance patterns as compared to older studies. ATT initiation is a fateful decision and every attempt should be made to rule out TB mimics and establish DSP before initiation.

18.
Mycoses ; 63(11): 1149-1163, 2020 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-32681527

RESUMEN

BACKGROUND: The epidemiology, clinical profile and outcome of paediatric candidemia vary considerably by age, healthcare settings and prevalent Candida species. Despite these differences, few comprehensive studies are undertaken. This nationwide study addresses this knowledge gap. METHODS: 487 children who contracted ICU-acquired candidemia at 23 Indian tertiary care centres were assessed for 398 variables spanning demography, clinical characteristics, microbiology, treatment and outcome. RESULTS: Both neonates (5.0 days; range = 3.0-9.5) and non-neonatal children (7.0 days; range = 3.0-13.0) developed candidemia early after ICU admission. Majority of neonates were premature (63.7%) with low birthweight (57.1%). Perinatal asphyxia (7.3%), pneumonia (8.2%), congenital heart disease (8.4%) and invasive procedures were common comorbidities, and antibiotic use (94.1%) was widespread. C tropicalis (24.7%) and C albicans (20.7%) dominated both age groups. Antifungal treatment (66.5%) and removal of central catheters (44.8%) lagged behind. Overall resistance was low; however, emergence of resistant C krusei and C auris needs attention. The 30-day crude mortality was 27.8% (neonates) and 29.4% (non-neonates). Logistic regression identified admission to public sector ICUs (OR = 5.64), mechanical ventilation (OR = 2.82), corticosteroid therapy (OR = 8.89) and antifungal therapy (OR = 0.22) as independent predictors of 30-day crude mortality in neonates. Similarly, admission to public sector ICUs (OR = 3.62), mechanical ventilation (OR = 3.13), exposure to carbapenems (OR = 2.18) and azole antifungal therapy (OR = 0.48) were independent predictors for non-neonates. CONCLUSIONS: Our findings reveal a distinct epidemiology, including early infection with a different spectrum of Candida species, calling for appropriate intervention strategies to reduce candidemia morbidity and mortality. Independent factors identified in our regression models can help tackle these challenges.

19.
Trop Doct ; 50(4): 346-349, 2020 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-32576098

RESUMEN

A young Indian man presented elsewhere with a short history of haematuria and cough. Investigations revealed renal and pulmonary lesions. Histopathology of these lesions was reported as mucormycosis. He consulted us two months after onset of symptoms, asymptomatic and clinically well, having received no treatment. In view of clinico-histopathological discordance, a review of the biopsy slides was advised but the patient refused further work-up at that time. One week later, however, he was admitted with left hemiparesis. Brain imaging showed an abscess. He underwent surgical excision of the brain abscess and nephrectomy. Review of previous slides showed septate fungal filaments with granulomatous inflammation. Intraoperative cultures grew Aspergillus flavus. He received voriconazole for one year and is well at his two-year follow-up. His immunological work-up was negative for immunodeficiency. This case illustrates that granulomatous aspergillosis may be an indolent infection in apparently normal individuals and reiterates the importance of interpreting diagnostic reports in conjunction with clinical features.


Asunto(s)
Aspergilosis/patología , Aspergilosis/terapia , Adulto , Antifúngicos/uso terapéutico , Aspergilosis/diagnóstico , Aspergilosis/microbiología , Aspergillus flavus/aislamiento & purificación , Encéfalo/diagnóstico por imagen , Encéfalo/microbiología , Encéfalo/patología , Encéfalo/cirugía , Humanos , Riñón/diagnóstico por imagen , Riñón/microbiología , Riñón/patología , Pulmón/diagnóstico por imagen , Pulmón/microbiología , Pulmón/patología , Pulmón/cirugía , Masculino , Resultado del Tratamiento
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