Fungal corneal ulcer is common in India due to tropical climate and a large agrarian population that is at risk. Fonsecaea pedrosoi is the most common agent of chromoblastomycosis, a chronic localized fungal infection of the skin and subcutaneous tissues mainly involving lower extremities. We report a rare case of corneal chromoblastomycosis caused by F.pedrosoi, which was successfully treated with topical Amphotericin B followed by a long course of oral antifungal therapy. To the best of our knowledge, this is the first case of mycotic keratitis caused by F.pedrosoi, from the foothills of Himalayas.

Mucormycosis is an angioinvasive infection caused by ubiquitous filamentous fungi of the order Mucorales. It is a rapidly progressive fatal infection mostly reported in susceptible individuals, such as those with poorly controlled diabetes or those with defects in phagocytic function. Rhinocerebral mucormycosis is the most common type of mucormycosis in diabetic patients. This case report describes a 17-year-old girl with type 1 diabetes mellitus presenting with rhinocerebral mucormycosis. The patient presented with a history of toothache and facial pain with oedema of left half of face, periorbital oedema and depressed conciousness. She had hyperglycaemia with diabetic ketoacidosis and rapidly developed hemiparesis progressing to quadriparesis and died within 3 days of admission. The current report emphasises the importance of having a high index of suspicion when dealing with patients with diabetes presenting with facial pain or cellulitis and prompt initiation of medical therapy along with surgical debridement for control of rhinocerebral mucormycosis.

A 30-years-old male, driver by occupation, was admitted to neurology department with chief complaints of high-grade fever, intermittent, moderately severe headache lasting for 30 days associated with multiple episodes of vomiting. He had no history of seizures, ear discharge or earache, nor any focal neurological deficit, head trauma, weight loss, chronic cough, drug abuse including steroids, blood transfusion, or high-risk behavior. He did not have any history of cutaneous or respiratory manifestations neither he had any history of tuberculosis, diabetes, malignancy or any other such chronic illness.On examination, the patient was febrile (39°C) and conscious, alert, oriented to time, place and person. Higher motor functions were intact and speech was normal. Signs of meningeal irritation (nuchal rigidity and Kernig's sign) and bilateral papilloedema was present. Examination of other systems revealed no obvious abnormality.Laboratory investigations revealed Haemoglobin of 11mg/dl, raised total leukocyte count (13,000/mm cu.) with 78% lymphocytes. Serum electrolytes, renal function tests, and liver function tests were within normal limits. A Cerebrospinal Fluid (CSF) examination revealed 210 cells/mm 3 , predominantly lymphocytes, with protein 92mg/dl and glucose 22 mg/dl (corresponding blood glucose was 136 mg/dl). A Computerized Tomography (CT) scan of the head and a Chest X-ray were both normal. The CSF specimen was received in laboratory for microbiological investigations such as staining, culture and sensitivity. Macroscopically, the CSF was clear and without coagulum. On microscopy, Gram stain showed round budding yeast cells varying in size [Table/ Fig-1a]. There were no acid fast bacilli on Ziehl-Neelsen (ZN) stain. India ink preparation showed characteristic round budding yeast cells varying in size with distinct halos [Table /Fig-1b]; a bacterial culture was sterile. The CSF Cryptococcal Latex Agglutination Test (CALAS, Meridian Diagnostics, Cincinnati, Ohio) for Cryptococcal Antigen (CRAG) was positive, with a titer of 1:1024. Serum was also tested for CRAG and was positive. A presumptive diagnosis of cryptococcal meningitis was given to the clinicians and patient was promptly put on Amphotericin B and Flucytosine. Subsequently, culture on Sabouraud's dextrose agar yielded smooth colonies of yeast after five days of incubation at 37°C, with no growth at 30°C. With a battery of tests and biochemical reactions performed [Table/ Fig-2], [Table/ Fig-3a and b] the isolate was characterized as C.gattii. Serotyping of the organism was not possible at this point.The anti-fungal susceptibility testing of the isolate was performed by using microbroth dilution technique and results were interpreted according to Clinical and Laboratory Standards Institute (CLSI) guidelines [1]. The Minimum Inhibitory Concentration (MIC) values for fluconazole, Amphotericin B (Amp B), and voriconazole were ≤ 1 μg/ml, 0.50 μg/ml, and ≤ 0.12 μg/ml respectively. Also E-Test (AB Biodisk, Sweden) was used for Amphotericin B, which show...

No abstract

Introduction: Methicillin-resistant Staphylococcus aureus (MRSA) has become a global challenge. The shift of this organism form hospital settings to community setting and increasing resistance to non-β-lactams antibiotics have further aggravated the crisis. This trend in MRSA has necessitated the knowledge and sensitization about this agent among physicians in rural and peripheral settings. Material and Methods: Present study was undertaken at Department of Microbiology at rural medical college of North India from January 2017 to December 2019 (3 years). All the clinical samples collected with aseptic precautions were processed as per standard protocol. All the Staphylococcus aureus isolates cultured were subjected to antimicrobial susceptibility testing as per CLSI guidelines 2019. Screening for MRSA was done by CLSI recommended methods, such as cefoxitin disc (30 μg), oxacillin disc (1 μg), and oxacillin screen agar as per CLSI recommendation. Results: A steady increase in number of MRSA isolates was observed from year 2017 to 2019 with overall prevalence being 33.7%. Most MRSA isolates were obtained from pus samples. Cefoxitin disc diffusion method is a dependable detection method compared to oxacillin disc diffusion and oxacillin screen agar for identification of MRSA. Conclusion: The rising trend of MRSA impresses upon the acute need of stringent infection control practices namely strict compliance to hand hygiene, prevention of misuse and overuse of antibiotics and a continuous surveillance program for MRSA. Also sensitization about this agent among the primary health physician is the need of hour to implement the control measures and limit its spread in communities.

Hymenolepis diminuta (H. diminuta) is primarily a parasite of rats and mice. Humans are infected by eating meal contaminated with these arthropods. This infection is not seen commonly in Indian population. We present here a case report of infection with H. diminuta in a young boy from a rural area of the North India.

In the present work, effects of compressibility on the dynamic stall of NACA 0012 airfoil, pitching sinusoidally from 5.03° to 24.79°, are investigated computationally using implicit large eddy simulations in a finite difference framework. Simulations of two-dimensional (2D), high Reynolds number, compressible flows are carried out without any transition or turbulence model to capture the physics of the dynamic stall process. The problem is formulated in a body-fixed, rotating, non-inertial frame. High accuracy, dispersion relation preserving optimized upwind compact scheme is used to compute convective flux derivatives, and an optimized three-stage Runge-Kutta method is used for time integration. Results are presented for free stream Mach number M∞ = 0.283, 0.4, and 0.5, where the Mach number is varied independent of the Reynolds number. The computations have been quite successful in capturing the essential features of the dynamic stall mechanism. It is observed that dynamic moment and lift stalls occur at smaller angles of attack as the Mach number increases. Reduction in the size of airload hysteresis loops and maximum attainable load coefficients are observed with increasing Mach number. Weak shock waves are observed near the leading edge (LE) at M∞ = 0.4, and lambda-shock is formed near the LE for M∞ = 0.5. It is observed that with increasing Mach number, the impact of dynamic stall on the aerodynamic loads (Cl, Cd, and Cm) becomes less dramatic as the maximum value attained by these aerodynamic loads decreases with an increase in the Mach number. An increase in positive damping area in the hysteresis loop is observed with an increase in the Mach number, inhibiting possible vulnerability to stall flutter.

No abstract