Diphtheria Resurgence and Gaps in Vaccination Diphtheria is a toxin-mediated bacterial disease. *Corynebacterium diphtheriae* usually causes it. The germ can inflame the throat and release a powerful toxin. That toxin can damage the heart, nerves, and kidneys. A grey membrane in the throat can also block breathing. The disease is preventable. Vaccination remains the main […]
Tag: Infection
Microscopy Techniques in Bacterial Diagnosis Microscopy remains the cornerstone of bacterial pathology. The Gram stain divides bacteria into Gram‑positive and Gram‑negative. This simple test guides therapy and classification. The acid‑fast stain detects organisms like Mycobacterium tuberculosis. Its resistance to decolorization reveals critical pathogens. The dark‑field microscopy highlights delicate organisms invisible under normal light. It is […]
Endotoxins versus Exotoxins: How Bacterial Toxins Differ in Disease Bacteria harm the host in more than one way. Some invade tissue. Others steal nutrients. Many release, or shed, poisons called toxins. Two large groups matter in medicine: endotoxins and exotoxins. They differ in chemistry, release, and clinical effect. The names sound similar. The biology does […]
Liver-function tests and renal-function tests do not measure one organ as a single machine. They report selected chemicals in blood and, sometimes, in urine. A clinician then reads the pattern, not one isolated number. Context always matters. Age, drugs, muscle mass, pregnancy, and timing of the sample change the meaning. Liver panels usually include bilirubin, […]
Rotavirus is a leading cause of severe diarrhoea in young children. The virus spreads easily through the faecal–oral route. Infants and children under five face the highest risk. Without good care, rapid fluid loss can become life-threatening. The illness often starts suddenly. Watery stools, vomiting, and fever appear together. Dehydration then follows. Antibiotics do not […]
Viral transmission often changes with the seasons. Some infections rise in winter. Others increase during rainy or warmer months. Environmental conditions help explain these patterns. Therefore, researchers study climate, humidity and human behaviour together. Temperature affects both the virus and the host. Many respiratory viruses survive longer in cooler air. Dry conditions can also keep […]