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1.
Diagn Microbiol Infect Dis ; 110(2): 116469, 2024 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-39106650

RESUMEN

Failure in recognizing non-tuberculous mycobacteria (NTM) leads to misdiagnosis of multidrug-resistant Mycobacterium tuberculosis Complex (MTBC). There is an unmet need for diagnostic tools that can differentiate between NTMs and MTBC, and that are affordable for Low- and Middle-income Countries (LMIC). Earlier we developed a strip-based CrfA assay technology to detect the Carbapenem Resistance Factor A (CrfA) enzyme present only in MTBC. However, the strip-based CrfA assay had low turnaround time and lacked high-throughput capabilities. In this current research, we have developed a 96well-formatted CrfA assay for high-throughput detection of MTBC and differentiation with NTMs. This 96well-formatted CrfA assay displays a low turnaround time of 6-8 h with 100 % specificity and 93.75 % sensitivity on clinical samples. Based on these attributes, this 96well-formatted assay represents a valuable complementary tool to mitigate the misdiagnosis of chronic pulmonary tuberculosis with non-tuberculous mycobacteria in poorer nations.


Asunto(s)
Mycobacterium tuberculosis , Micobacterias no Tuberculosas , Sensibilidad y Especificidad , Mycobacterium tuberculosis/aislamiento & purificación , Humanos , Micobacterias no Tuberculosas/aislamiento & purificación , Micobacterias no Tuberculosas/clasificación , Infecciones por Mycobacterium no Tuberculosas/diagnóstico , Infecciones por Mycobacterium no Tuberculosas/microbiología , Proteínas Bacterianas , Ensayos Analíticos de Alto Rendimiento/métodos
2.
Naunyn Schmiedebergs Arch Pharmacol ; 397(9): 7117-7127, 2024 09.
Artículo en Inglés | MEDLINE | ID: mdl-38643454

RESUMEN

Urinary tract infections (UTIs) are among the most common bacterial infections, posing significant public health challenges due to increasing antimicrobial resistance (AMR). This study aims to assess the prevalence, demographic characteristics, microbial profile, and antimicrobial resistance patterns in Indian patients with UTIs admitted to intensive care unit. A total of 154 patients with positive UTIs were included in this cross-sectional study. The prevalence data including demographics, microbial isolates, and antimicrobial susceptibility patterns were collected. Additionally, risk factors for multidrug resistance uropathogens were assessed using multivariate analyses. The patient cohort had diverse demographic, with a slight male predominance of 52.6% (n = 81). The most common comorbidities were hypertension 59.1% (n = 91) and diabetes mellitus 54.5% (n = 84). The microbial profile was dominated by gram-negative bacteria, particularly Escherichia coli 26.62% (n = 41) and Klebsiella pneumoniae 17.53% (n = 27). The predominant gram-positive and fungal isolate was Enterococcus faecium 7.14% (n = 11) and Candida spp. 18.83% (n = 29), respectively. Substantial resistance was noted against common antimicrobials, with variations across different pathogens. Gram-negative bacteria, particularly Escherichia coli and Klebsiella pneumoniae, exhibited high MDR rates, emphasizing the challenge of antimicrobial resistance. Multivariate logistic regression identified age groups 50-65 and over 65, and prolonged catheterization as significant risk factors for MDR infections. A significantly high resistance rate among pathogens emphasizes the need for judicious antimicrobial use. Our findings emphasize the necessity of ongoing surveillance and tailored interventions based on local pathogen prevalence and antibiogram data to effectively address the threat of AMR threat for better management of UTI management in ICU settings.


Asunto(s)
Antibacterianos , Farmacorresistencia Bacteriana Múltiple , Unidades de Cuidados Intensivos , Centros de Atención Terciaria , Infecciones Urinarias , Humanos , Masculino , Femenino , Infecciones Urinarias/microbiología , Infecciones Urinarias/epidemiología , Infecciones Urinarias/tratamiento farmacológico , Persona de Mediana Edad , Prevalencia , Estudios Transversales , Adulto , Anciano , Antibacterianos/farmacología , Antibacterianos/uso terapéutico , India/epidemiología , Factores de Riesgo , Pruebas de Sensibilidad Microbiana
3.
PLoS One ; 18(1): e0265290, 2023.
Artículo en Inglés | MEDLINE | ID: mdl-36662835

RESUMEN

INTRODUCTION: Healthcare workers (HCW) are most vulnerable to contracting COVID-19 infection. Understanding the extent of human-to-human transmission of the COVID-19 infection among HCWs is critical in managing this infection and for policy making. We did this study to estimate new infection by seroconversion among HCWs in recent contact with COVID-19 and predict the risk factors for infection. METHODS: A cohort study was conducted at a tertiary care COVID-19 hospital in New Delhi during the first and second waves of the COVID-19 pandemic. All HCWs working in the hospital during the study period who came in recent contact with the patients were our study population. The data was collected by a detailed face-to-face interview, serological assessment for anti- COVID-19 antibodies at baseline and end line, and daily symptoms. Potential risk factors for seroprevalence and seroconversion were analyzed by logistic regression keeping the significance at p<0.05. RESULTS: A total of 192 HCWs were recruited in this study, out of which 119 (62.0%) were seropositive. Almost all were wearing Personal protective equipment (PPE) and following Infection prevention and control (IPC) measures during their recent contact with a COVID-19 patient. Seroconversion was observed among 36.7% of HCWs, while 64.0% had a serial rise in the titer of antibodies during the follow-up period. Seropositivity was negatively associated with being a doctor (odds ratio [OR] 0.35, 95% Confidence Interval [CI] 0.18-0.71), having COVID-19 symptoms (OR 0.21, 95% CI 0.05-0.82), having comorbidities (OR 0.14, 95% CI 0.03-0.67), and received IPC training (OR 0.25, 95% CI 0.07-0.86), while positively associated with partial (OR 3.30, 95% CI 1.26-8.69), as well as complete vaccination for COVID-19 (OR 2.43, 95% CI 1.12-5.27). Seroconversion was positively associated with doctor as a profession (OR 13.04, 95% CI 3.39-50.25) and with partially (OR 4.35, 95% CI 1.07-17.65), as well as fully vaccinated for COVID-19 (OR 6.08, 95% CI 1.73-21.4). No significant association was observed between adherence to any IPC measures and PPE adopted by the HCW during the recent contact with COVID-19 patients and seroconversion. CONCLUSION: Almost all the HCW practiced IPC measures in these settings. High seropositivity and seroconversion are most likely due to concurrent vaccination against COVID-19 rather than recent exposure to COVID-19 patients. Further studies using anti-N antibodies serology may help us find the reason for the seropositivity and seroconversion among HCWs.


Asunto(s)
COVID-19 , Humanos , COVID-19/epidemiología , SARS-CoV-2 , Pandemias/prevención & control , Estudios de Cohortes , Estudios Seroepidemiológicos , Personal de Salud , India/epidemiología , Factores de Riesgo , Atención a la Salud
4.
Indian J Tuberc ; 69(4): 441-445, 2022 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-36460373

RESUMEN

BACKGROUND/PURPOSE: The diagnosis of TB in the head & neck region is challenging due to diverse presentations and due to changing clinical pictures. The aim of this article is to report three unusual primary cases of head and neck tuberculosis in immunocompetent patients presenting to our hospital with description of their clinical presentation, appropriate diagnostic methods used and treatment response of these patients. METHODS: Three clinical cases were of primary tuberculosis of the lacrimal system, the thyroid gland and of the temporal space were clinically worked up. The aspirate from the swellings were sent for Cytology and Gene Xpert tests. RESULTS: The Gene Xpert tests were positive in these unusual cases and aided the Cytology in promptly confirming the diagnosis which otherwise would be missed if staining for AFB is negative. ATT was started and responded well to the treatment. CONCLUSION: These cases demonstrate the importance of having a high index of suspicion for tuberculosis as a cause of head and neck swellings, especially in developing countries. It also illustrates the value of needle aspiration in such swellings and sending it for cytology and Gene Xpert for early diagnosis of tuberculosis.


Asunto(s)
Cuello , Glándula Tiroides , Tuberculosis , Humanos , Dolor en el Pecho , Hospitales , Coloración y Etiquetado , Tuberculosis/diagnóstico
6.
J Clin Diagn Res ; 8(6): DD03-4, 2014 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-25120984

RESUMEN

Shigellosis is still an important public health problem in developing and under-developed countries. It may lead to rare but potentially fatal various extra intestinal complications like septicemia, involvement of CNS, urinary tract and liver especially in young malnourished children. The disease is difficult to prevent as only few bacteria are required for causing infection and there is increasing infection with multi drug resistant strains. A 6-month-old infant developed septicemia caused by multi drug resistant Shigella flexneri during an episode of gastrointestinal infection. The patient was managed in the emergency ward but unfortunately the infant expired. Considering septic shock, blood culture, stool culture and other relevant investigations were done. Stool as well as blood culture yielded Shigella flexneri. The isolates were multidrug resistant. Following is a rare case presentation of Shigella septicemia with severe shock, DIC and convulsions. The case report demonstrates how shigellosis can lead to a rare life threatening complication and hence should be considered as a possibility in septicemia associated with diarrhea and vomiting in infant and young children.

7.
Indian J Pathol Microbiol ; 56(4): 388-92, 2013.
Artículo en Inglés | MEDLINE | ID: mdl-24441227

RESUMEN

CONTEXT: Bacterial isolates from intra-abdominal infections, in particular, peritonitis and their unpredictable antimicrobial resistance patterns, continue to be a matter of concern not only globally but regionally too. AIM: An attempt in the present study was made to study the patterns of drug resistance in bacterial isolates, especially gram negative bacilli in intra-abdominal infections (IAI) in our hospital. MATERIALS AND METHODS: From 100 cases of peritonitis, identification of isolates was done as per recommended methods. Antimicrobial susceptibility and extended-spectrum beta-lactamase (ESBL) testing were performed following the CLSI guidelines. RESULTS: A total of 133 clinical isolates were obtained, of which 108 were aerobes and 22 anaerobes. Fungal isolates were recovered in only three cases. Escherichia coli (47/108) emerged as the most predominant pathogen followed by Klebsiella spp. (27/108), while Bacteroides fragilis emerged as the predominant anaerobe (12/22). Among coliforms, 61.7% E. coli and 74.1% Klebsiella spp. were ESBL positive. A high level of resistance was observed for beta lactams, ciprofloxacin, amikacin, and ertapenem. Ertapenem resistance (30-41%) seen in coliforms, appears as an important issue. Imipenem, tigecycline, and colistin were the most consistently active agents tested against ESBL producers. CONCLUSION: Drug resistance continues to be a major concern in isolates from intra-abdominal infections. Treatment with appropriate antibiotics preceded by antimicrobial resistance testing aided by early diagnosis, adequate surgical management, and knowledge of antibiotic - resistant organisms appears effective in reducing morbidity and mortality in IAI cases.


Asunto(s)
Antibacterianos/farmacología , Infecciones Bacterianas/microbiología , Farmacorresistencia Bacteriana , Bacterias Gramnegativas/clasificación , Bacterias Gramnegativas/efectos de los fármacos , Infecciones Intraabdominales/microbiología , Infecciones Bacterianas/epidemiología , Hongos/aislamiento & purificación , Bacterias Gramnegativas/aislamiento & purificación , Bacterias Grampositivas/clasificación , Bacterias Grampositivas/efectos de los fármacos , Bacterias Grampositivas/aislamiento & purificación , Hospitales de Enseñanza , Humanos , Infecciones Intraabdominales/epidemiología , Pruebas de Sensibilidad Microbiana , beta-Lactamasas/análisis
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