Jennifer John

Introduction At the turn of the 20th century, the mysterious spread of typhoid fever in affluent New York households baffled physicians and health officials. Behind these outbreaks was an unlikely figure: Mary Mallon, an Irish immigrant cook who would go down in history as Typhoid Mary . Her story is not just a tale of science and scandal, but a pivotal moment in the development of public health policies and ethics. The Story of Mary Mallon Mary Mallon arrived in the United States from...

Introduction DICER1 is a gene that plays a crucial role in microRNA (miRNA) processing and, by extension, the regulation of gene expression. Germline mutations in DICER1 cause DICER1 syndrome, a rare autosomal dominant hereditary cancer predisposition syndrome primarily affecting children and young adults. Recognizing the clinical spectrum of DICER1-related disorders is essential for early detection, surveillance, and genetic counseling. What is the DICER1 Gene? The DICER1  gene encodes a...

Introduction Cholera is an acute diarrheal illness caused by the ingestion of food or water contaminated with Vibrio cholerae . This gram-negative, comma-shaped bacterium produces cholera toxin, which leads to profuse watery diarrhea, rapid dehydration, and if untreated, death. Although largely preventable and treatable, cholera remains a major public health concern in many developing nations, particularly in regions with inadequate sanitation and limited access to clean water. Etiology and...