Hepatitis is the inflammation of the liver, commonly caused by viral infections, though it can also result from other factors such as autoimmune reactions, drug toxicity, and alcohol abuse. Viral hepatitis is categorized by different types (A, B, C, D, and E), each caused by specific viruses. Etiopathogenesis 1. Viral Hepatitis: Hepatitis A (HAV): Fecal-oral…
Urinary tract infections (UTIs) are microbial infections that affect any part of the urinary system, including the kidneys, bladder, ureters, and urethra. They are commonly caused by bacteria, but viruses and fungi can also be responsible. UTIs can be categorized as lower (cystitis, urethritis) or upper (pyelonephritis) depending on the involved anatomical structures. Etiopathogenesis 1….
Pneumonia is a lower respiratory tract infection characterized by inflammation of the lung parenchyma. It results in the accumulation of cellular and exudative material within the alveoli, impairing normal gas exchange. Pneumonia can be caused by various infectious agents, including bacteria, viruses, fungi, and parasites. Etiopathogenesis 1. Infectious Agents: – Bacteria: Common bacterial causes…
Megaloblastic anemia is a type of macrocytic anemia characterized by the presence of unusually large and immature red blood cells (megaloblasts) in the bone marrow. This condition is primarily caused by a deficiency of vitamin B12 or folic acid, which are essential for DNA synthesis and normal maturation of red blood cells. Etiopathogenesis The main…
Iron deficiency anemia (IDA) is a common type of anemia characterized by a decreased level of hemoglobin in the blood due to insufficient iron. Hemoglobin is essential for transporting oxygen from the lungs to the rest of the body. Iron deficiency can result from inadequate dietary intake, impaired absorption, increased iron requirements, or chronic blood…
Inflammatory Bowel Diseases (IBD) are chronic inflammatory conditions of the gastrointestinal tract, characterized by periods of flare-ups and remissions. The two main types of IBD are Crohn’s disease (CD) and ulcerative colitis (UC). These conditions involve complex interactions between genetic, environmental, and immunologic factors. Etiopathogenesis 1. Genetic Factors: There is a genetic predisposition to IBD,…
Alcoholic liver disease refers to a spectrum of liver conditions caused by excessive and prolonged alcohol consumption. It encompasses fatty liver, alcoholic hepatitis, and cirrhosis. The severity of ALD can range from reversible conditions to life-threatening complications. Etiopathogenesis 1. Alcohol Metabolism: Alcohol is metabolized in the liver, leading to the production of toxic by-products, including…
Peptic ulcer disease refers to the presence of open sores or ulcers in the lining of the stomach (gastric ulcers) or the first part of the small intestine (duodenal ulcers). The most common cause of peptic ulcers is infection with the bacterium Helicobacter pylori (H. pylori) or the use of nonsteroidal anti-inflammatory drugs (NSAIDs) Etiopathogenesis…
Gastroesophageal reflux disease (GERD) is a chronic condition where stomach acid regularly flows back into the esophagus, causing irritation and inflammation. This backflow of stomach contents can lead to various symptoms and complications. Etiopathogenesis GERD often results from a malfunction of the lower esophageal sphincter (LES), a ring of muscle that separates the esophagus from…
Migraine, a neurological disorder, features recurrent, moderate to severe headaches often accompanied by other symptoms such as nausea, vomiting, sensitivity to light, and sound. Migraines can significantly impact daily life and may last from a few hours to several days. Etiopathogenesis: Researchers believe that migraines result from a combination of genetic, environmental, and neurovascular factors,…
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