Nidhi Singla

Dr. Nidhi Singla


Research Focus & Metrics

Academic Career Length

20Years (2007-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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6 April 2018 in Journal of Fungi
Verified
Journal Article
Open access
PDF file
JCJagdish Chander
Jagdish Chander
MKMandeep Kaur
Mandeep Kaur
NSNidhi Singla
Nidhi Singla
RPR. P. S. Punia
R. P. S. Punia
SSSurinder K. Singhal
Surinder K. Singhal
JGJosep Guarro
Josep Guarro
Mucormycosis is an emerging opportunistic fungal infection. Increasing immunocompromization, widespread use of antibacterial and antifungal agents (such as voriconazole prophylaxis), carcinomas, transplantation and lifestyle diseases such as diabetes are the main contributors to this situation. The predominant clinical manifestations of mucormycosis vary from host to host, with rhino-orbital-cerebral, pulmonary, cutaneous, and gastrointestinal infections being the most common. In India, the prevalence of mucormycosis is approximately 0.14 cases/1000 population, which is about 70 times the worldwide-estimated rate for mucormycosis. The present study was undertaken over a period of five years (January 2009–December 2014) to determine the prevalence of mucormycosis. The samples suspected of mucormycosis were examined by direct KOH wet mount and cultured on Sabouraud’s dextrose agar without actidione and on blood agar as per standard mycological techniques. Histopathological correlation was done for most of the cases. Antifungal susceptibility testing was performed by the EUCAST reference method. We identified a total of 82 cases of mucormycosis out of a total of 6365 samples received for mycological culture and examination during the said time period. Out of these, 56 were male patients and 27 were females. Most common presentation was rhino-orbito-cerebral (37), followed by cutaneous (25), pulmonary (14), oral cavity involvement (4) and gastrointestinal (2). The most common risk factors were diabetes and intramuscular injections. The fungi isolated were Rhizopus arrhizus (17), Apophysomyces variabilis (12), R. microsporus (9), Lichtheimia ramosa (8), Saksenaea erythrospora (5), Syncephalastrum racemosus (4), R. homothallicus (2), Rhizomucor pusillus (1), Mucor irregularis (1) and A. elegans (1). The mainstay of the treatment was amphotericin B, along with extensive surgical debridement whenever feasible. Most of the patients (50) recovered, but 25 died. The rest of the patients left against medical advice. “Nip in the Bud” should be the mantra for clinicians/surgeons for a favorable prognosis. Early diagnosis, prompt institution of appropriate antifungal therapy, surgical debridement whenever necessary, knowledge of risk factors and their timely reversal is the key for management.

21 August 2021 in Cureus
Verified
Journal Article
Open access
VMVibha Mehta
Vibha Mehta
CNCharu Nayyar
Charu Nayyar
NGNeelam Gulati
Neelam Gulati
NSNidhi Singla
Nidhi Singla
SRSunvir Rai
Sunvir Rai
JCJagdish Chandar
Jagdish Chandar
Trichosporon species are basidiomycetous yeast-like organisms found ubiquitous in nature. They are increasingly been recognized as opportunistic pathogens capable of causing life-threatening invasive diseases (trichosporonosis), especially in immuno-suppressed patients and rarely in immuno-competent patients too. Earlier multiple members of the genus Trichosporon were clubbed together as T. beigelli but after the advent of molecular techniques, more than 50 different subspecies and around 16 different strains causing human diseases are reported. It is known to cause a wide range of diseases, from superficial to probable and proven invasive diseases to summer hypersensitivity. The ability of Trichosporon strains to form biofilms on implanted devices, glucuronoxylomannan in their cell walls, and production of proteases and lipases lead to the virulence of this genus. This ubiquitous fungus exhibits intrinsic resistance to echinocandins, variable minimum inhibitory concentrations (MIC) for amphotericin B, and moderate susceptibility to fluconazole and Itraconazole, which are the commonly used anti-fungal agents for any invasive fungal infections which lead to the re-emergence of this notorious yet neglected pathogen and hence the reports of breakthrough infections among patients receiving these antifungals. This review is to understand the epidemiological, clinical details, and antifungal susceptibility pattern of various Trichosporon infections and it highlights the importance of early detection and treatment for this emerging yeast and also will add to the ongoing surveillance for the anti-fungal susceptibility pattern for this fungus.

16 September 2013 in The Journal of Infection in Developing Countries
Verified
Journal Article
Open access
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JCJagdish Chander
Jagdish Chander
NSNidhi Singla
Nidhi Singla
SSShailpreet Kaur Sidhu
Shailpreet Kaur Sidhu
SGSatinder Gombar
Satinder Gombar
Introduction: Bloodstream infections due to Candida species are becoming a major cause of morbidity and mortality in hospitalized patients. The spectrum of candidemia has changed with the emergence of non-albicans Candida species, especially among critically ill patients. Methodology: In a retrospective study (July 2009 to December 2009) on candidemia, various Candida species isolated from blood cultures were characterized and studied along with the determination of their antifungal susceptibility to amphotericin B, itraconazole, and fluconazole by Etest. Probable risk factors for patients in the intensive care unit (ICU) presenting with candidemia were also analyzed. Results: During the study period, a total of 4651 samples were received, out of which 468 samples (10.06%) were positive for growth of organisms: 441 (94.20%) aerobic bacterial pathogens and 27 (5.79%) Candida species. The most common Candida spp. isolate was C. tropicalis (40.8%) followed by C. albicans (29.6%), C. glabrata (18.5%) and others (11.1%). Out of the 27 Candida strains, 24 (88.9%) were isolated from patients treated in the ICU. Among these, association of previous use of broad-spectrum antibiotics in 22 patients (91.6%) and central line catheter insertion in 20 patients (83.3%) were found to be statistically significant as compared to non-candidemia patients (p <0.05). Antifungal susceptibility testing of the isolates revealed a lower level of drug resistance to amphotericin B (18.5% of the isolates) versus 77.8% resistance to fluconazole. Conclusion: Rapid changes in the rate of infection, potential risk factors, and emergence of non-albicans Candida demand continued surveillance of this serious bloodstream fungal infection.

9 April 2022 in Current Fungal Infection Reports
Verified
Journal Article
Closed access
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RKReetu Kundu
Reetu Kundu
NSNidhi Singla
Nidhi Singla

15 September 2016 in Mycopathologia
Verified
Journal Article
Closed access
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JCJagdish Chander
Jagdish Chander
NSNidhi Singla
Nidhi Singla
RKReetu Kundu
Reetu Kundu
UHUma Handa
Uma Handa
ACAnuradha Chowdhary
Anuradha Chowdhary

1 March 2015 in Asian Pacific Journal of Tropical Medicine
Verified
Journal Article
Open access
NSNidhi Singla
Nidhi Singla
SASunita Arora
Sunita Arora
PGPoonam Goel
Poonam Goel
JCJagdish Chander
Jagdish Chander
AHAnju Huria
Anju Huria
To keep the level of awareness high as far as incidence of dengue among pregnant women is concerned. A total of 300 blood samples of patients with fever in pregnancy were received in the Department of Microbiology to rule out dengue infection (January 2011 to December 2012). The samples were put up for presence of dengue IgM antibodies and NS1Ag by ELISA. The patients who turned out to be positive for dengue serology were retrospectively analysed with respect to patient's age, gestational age, clinical presentation, complications, platelet counts and maternal as well as foetal outcomes. Out of 300 females tested, 22 (7.3%) were found positive for dengue infection during the said time period. Out of them 9 were positive for IgM antibodies against dengue and 10 were found to be positive for NS1Ag, while 3 were positive for both IgM antibody and NS1Ag. Five patients presented with dengue in first trimester, 9 in second trimester and 8 in third trimester. Two patients had coinfections. Patient with coinfection of dengue with malaria had intrauterine death of fetus at 37 weeks while the second one having dengue with typhoid had a preterm vaginal delivery at 35 weeks. Establishing diagnosis of dengue infection in pregnancy is important for effective management by the obstetricians particularly the mode of delivery due to the potential risk of hemorrhage for both the mother and the newborn. Co-infections seen in endemic areas may be more common than usually reported.