Dual-strain dynamics of COVID-19 variants in India: Modeling, analysis, and implications for pandemic control.

This study introduces a detailed compartmental model developed to understand the complex dynamics of COVID-19 transmission, focusing on the Delta and Omicron variants in India. The model tracks disease progression through different population compartments, considering factors like vaccination, time-dependent transmission, economic burden and COVID-19 death rates, loss of vaccine-induced immunity, and the transition of asymptomatic cases to recovery. The model is validated against established epidemiological knowledge and real-world data, emphasizing dynamic parameterization and accurate representation of immunity dynamics. The basic reproduction number for both variants is calculated, and sensitivity analysis for various parameters is conducted. Time-dependent parameters are estimated using the discrete inverse method. The study also explores the economic burden, impact of different types of masks, vaccine efficacy, and vaccine-induced immunity through numerical analysis.

Symmetrical peripheral gangrene and tuberculosis: A rare kinship.

Symmetrical peripheral gangrene (SPG) is a rare clinical syndrome characterized by ischemic necrosis of 2 or more limbs, without involvement of large vessels. It is often associated with disseminated intravascular coagulation and septic shock. Usually caused by Gram-positive and Gram-negative organisms, tuberculosis as a cause is extremely rare. We present the case of a 46-year-old man, who initially presented with signs and symptoms suggestive of tuberculosis but later developed SPG along with septic shock after his initial visit. The case highlights the progression of this dreaded complication and touches upon recent developments in its etiology as well as pathogenesis.

Hernia of Morgagni in the Elderly: A Case Report.

Congenital diaphragmatic hernias are infrequently encountered in adult patients. A rare type of this hernia is the Morgagni's hernia. Although they remain asymptomatic in a majority of patients, we present the case of an elderly patient who presented to us with abdominal pain and upper gastrointestinal bleeding.