Browsing by Author "Vijayakumar, B"

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    A case of tuberculosis of adrenal gland presenting as acute adrenal insufficiency following initiation of anti-tubercular therapy
    (Scientific Scholar, 2024-12) Vijayakumar, B; Meganathan, A; Ranganathan, SD; Paulchamy, B.
    Adrenal tuberculosis is one important cause of acute or chronic adrenal insufficiency in developing countries like India. There are many random cases in literature describing various clinical situations of adrenal tuberculosis presenting with adrenal insufficiency, especially after initiation of anti-tubercular therapy. A 43-year-old male recently diagnosed patient with pulmonary tuberculosis and chronic coronary syndrome was admitted for acute decompensated heart failure with pulmonary edema. He was taking fixed dose combination anti-tubercular therapy. During admission, he had hyponatremia (serum sodium 96 mEq/L) and during treatment, he developed hypotension and shock, which were appropriately treated. Due to ischemic hepatitis, anti-tubercular treatment (ATT) was modified to streptomycin, ethambutol, and ofloxacin regimen to avoid further hepatotoxicity. Hyponatremia and shock recovered. Rifampicin and isoniazid were restarted. He again developed easy fatigability, nausea, vomiting, and hypotension. Suspecting adrenal insufficiency, fasting serum cortisol, and adrenocorticotropic hormone (ACTH) were done, which revealed a low serum fasting cortisol and high ACTH. Computed tomography abdomen showed enlarged left adrenal gland with calcifications. He was started on prednisolone 2 mg/ kg/day with full dose fixed dose ATT, following which his symptoms resolved.
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    Field evaluation of biosurfactants, surfactin and di-rhamnolipid produced by Bacillus subtilis subsp. subtilis (VCRC B471) and Pseudomonas fluorescens (VCRC B426) against immature stages of the urban malaria vector Anopheles stephensi
    (Wolters Kluwer – Medknow, 2022-07) Kumar, Ashwani; Kumar, Hemanth; Manonmani, AM; Prabakaran, G; Vijayakumar, B; Mathivanan, A; Geetha, I; Jambulingam, P
    Background & objectives: Bacillus subtilis subsp. subtilis (VCRC B471) and Pseudomonas fluorescens (B426) produce mosquitocidal biosurfactant, surfactin and di-rhamnolipid. The objective of the study was to carry out a small-scale field evaluation of the two biosurfactants to determine the efficacy, application dosage, residual activity and frequency of application against Anopheles stephensi immatures in selected sites in Goa, India. Methods: Surfactin (VCRC B471) and di-rhamnolipid (VCRC B426) were formulated as aqueous suspensions (5% AS), and were applied at the dosages of 34, 51 and 68 mL/m2 and 27, 41 and 54 mL/m2 respectively. Two experiments were carried out with the two formulations. Results: Surfactin (VCRC B471) formulation was effective at all the dosages and there was sustained reduction (>80%) in immature density in the treated sites up to 18 days in experiment 1 and up to 15 days in experiment 2. No pupae were found in the treated sites throughout the study. Di-rhamnolipid (VCRC B426) formulation was also found to reduce the immature density in the treated sites up to 14 days in experiment 1 and up to 15 days in experiment 2. Interpretation & conclusion: For VCRC B471, the optimum application dosage determined was 51 mL/m2 and for VCRC B426, 27mL/m2 . The formulations are to be applied fortnightly for effective control of Anopheles. The application dosage determined in the present study can be used for large scale field evaluation to assess their suitability for use in public health programmes for the control of Anopheles mosquitoes vectoring malaria
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    Predicting Short-term Readmission in Hospitalized Patients with Acute Heart Failure: The Use of 6-minute Walk Test at Discharge
    (Association of Physicians of India, 2023-02) Vijayakumar, B; Meganathan, A; Paulchamy, B; Ranganathan, Sharmila, Devi
    Background: Hospitalization is an important landmark in the history of heart failure. Patients admitted for acute heart failure have a high chance of readmission. We require predictors which can foresee readmission. Functional capacity assessment by the 6-minute walk test is one such predictor. Objectives: To compare the mean 6-minute walk distance among acute heart failure patients readmitted within 30 days, those readmitted within 60 days, those readmitted within 90 days, and those not readmitted at 90 days following discharge after the first admission. Methodology: This is a follow-up study conducted in Madras Medical College from March 2021 to August 2021. The study included patients who were admitted for the first time in their life for acute heart failure. The clinical details were noted, and the patients were managed as per standard protocols. Before discharge, a 6-minute walk test was performed. The patients were followed up at the end of 30, 60, and 90 days. Results: 25% of the patients had one readmission at the end of 90 days. Majority of readmissions occurred at the end of 30 days. A low 6-minute walk distance at discharge was a significant predictor of readmission at the end of 30 days. A distance of 200 m was a reasonable cutoff in our population. A lower time walked was also a significant predictor of readmission at the end of 30 days. A slower walking speed was also a significant predictor of readmission at the end of 30 days. Some other parameters such as a longer duration of stay, a longer duration of intravenous (IV) diuretic requirement, discharge respiratory rate, and lower serum albumin at admission were also significant predictors of readmission at the end of 30 days.