Learn about the causes, symptoms, and effects of Vitamin A deficiency, including night blindness, corneal keratinization, and impaired immune function. Explore the epidemiology and pathogenesis of this condition.

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Tuberculosis is a chronic disease caused by Mycobacterium tuberculosis that primarily affects the respiratory system. This overview covers the epidemiology, transmission methods, causative agents, pathogenesis, diagnostic methods, management, prevention, and control of tuberculosis. The importance o

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Viral pathogenesis explores the intricate relationship between viruses and their hosts, encompassing factors like viral effects on cells, entry mechanisms, tissue tropism, immune responses, and the outcomes of infection. This process involves a series of interactions leading to either virus clearanc

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Bacterial pathogenesis involves the ability of certain bacteria to cause disease by attributes such as transmissibility, adherence, motility, invasion, and toxigenicity. Pathogens can exploit host defenses, while virulence determines the severity of infection. Learn about opportunistic pathogens, no

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The ARISE-HF study presents primary results on the effectiveness of a selective aldose reductase inhibitor in treating diabetic cardiomyopathy, a common complication of diabetes mellitus leading to heart failure. The study highlights the increased risk of heart failure in individuals with diabetes,

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The superfamily Ancylostomatoidea includes blood-feeding parasites like hookworms, with important species such as Ancylostoma caninum in dogs and Ancylostoma duodenale in humans. These parasites have a complex lifecycle involving transmission through the environment and development within the host.

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Exploring the diverse ways viruses enter the body through various routes such as respiratory tract, oropharynx, skin, genitourinary tract, and eyes, shedding light on the steps of the virus life cycle shaping pathogenesis. Viral diseases result from the intricate interaction between viral and host f

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Amyloidosis is a disorder characterized by the deposition of abnormal amyloid fibrils in tissues, impacting various organs. This condition is associated with different types of amyloid, such as AA and AL amyloid. The deposition of amyloid can lead to tissue damage and organ dysfunction. Primary and

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Normal flora in the gastrointestinal tract play a crucial role in maintaining health, but can also cause disease in certain conditions. This lecture covers the common flora in the GIT, their role in diseases, various types of acute diarrheal illnesses, epidemiology, and management of bacterial agent

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Canine Monocytic Ehrlichiosis is a tick-borne disease caused by Erhlichia species, primarily affecting dogs. This article covers the pathogenesis, clinical findings in different phases (acute, subclinical, and chronic), and associated symptoms. Learn about the transmission, distribution, and potenti

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Purulent diseases of serous cavities, specifically purulent pleurisy and empyema pleurae, are marked by the secondary nature of inflammation in the parietal and visceral pleura. The classification details the etiology and clinical variations, while the pathogenesis explains the development from vari

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The article discusses the physiological basis, types, pathogenesis, and genetic predisposition of hypertension. It explains the revision of terminology related to blood pressure and the calculation of mean arterial pressure. Secondary hypertension, causes, and mean arterial pressure determination ar

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Pharyngitis is an inflammation of the pharynx characterized by coughing, painful swallowing, and appetite changes. It can be caused by physical or infectious factors, leading to symptoms such as virtual obstruction, regurgitation, and drooling. Understanding the etiology and pathogenesis is crucial

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Diseases of the Hair, Wool, Follicles, and Skin Glands covers various conditions like alopecia, hypotrichosis, and the failure of follicles to develop or produce fibers. It discusses causes, pathogenesis, clinical findings, and treatments related to hair and skin issues. The content delves into cong

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Myocarditis is an inflammatory heart condition with various causes, including viral infections and autoimmune responses. This article discusses the epidemiology, risk factors, pathogenesis, diagnosis, and management of myocarditis, highlighting the importance of differentiating it from pericarditis

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Explore the algorithms for identifying Salmonella and Shigella, their antigenic structures, virulence factors, pathogenesis, clinical features, and management concepts. Understand the characteristics, transmission, and prevention strategies for these gastrointestinal pathogens.

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Proteus species, named after the Greek god Proteus, exhibit pleomorphism. Their historical importance stems from the unique characteristics of H and O antigens, with flagellated strains resembling a thin film on agar. Pathogenically, Proteus mirabilis and P. vulgaris are opportunistic pathogens caus

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Glanders, also known as Farcy, Equinia, or Malleus, is a contagious disease affecting horses, mules, and donkeys. It is caused by the bacteria Pseudomonas mallei and can be transmitted through direct contact or inhalation. The disease manifests with nodules or ulcers in the respiratory tract and on

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Explore the significance of vitamin D and nutrition in managing patients with fractures, focusing on the expertise of Prof. Ren Rizzoli, an esteemed internist and endocrinologist. Delve into the pathogenesis of osteoporotic fractures and the role of malnutrition and vitamin D deficiency in rehabilit

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Explore the general characteristics, hosts, life cycle, transmission, and pathogenesis of Oxyuris equi, a pinworm that infects horses and donkeys. Learn about its unique features, including the hour-glass-shaped oesophagus, mating behavior, and effects on its hosts.

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Rickettsia, a genus of Gram-negative bacteria transmitted by arthropods, is responsible for diseases like Rocky Mountain spotted fever. It causes symptoms such as high fever, rash, and severe headache. Laboratory diagnosis involves serology and isolation from experimental animals. Learn more about R

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Johne's Disease, caused by Mycobacterium paratuberculosis, is a chronic bacterial infection affecting the lower intestinal tract of ruminants. It is characterized by chronic diarrhea and emaciation, mainly seen in mature animals. The mode of transmission includes contaminated food/water, intrauterin

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Human Immunodeficiency Virus (HIV) is a retrovirus causing Acquired Immunodeficiency Syndrome (AIDS). HIV leads to immune system destruction, making individuals vulnerable to opportunistic infections and tumors. Common sexually transmitted diseases like syphilis, chlamydia, and gonorrhea are discuss

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This educational material delves into the pathology, pathogenesis, and clinical features of acute pancreatitis, detailing the causes, morphological changes, and diagnostic challenges associated with this medical condition. Detailed explanations and images help enhance understanding for medical profe

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Herpes viruses are common human pathogens causing both asymptomatic infection and active disease. Ocular herpes, typically caused by HSV-1, presents with symptoms like pain, photophobia, and blurred vision. Factors like UV rays, trauma, and stress can trigger reactivation. Recurrent infections often

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Peptic ulcer disease and dyspepsia are common gastrointestinal conditions. Dyspepsia presents with upper abdominal pain and may or may not be associated with peptic ulcers. The most prevalent causes of dyspepsia include non-ulcer dyspepsia, GERD, and peptic ulcers. Peptic ulcers account for a signif

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Helicobacter pylori is a spiral-shaped Gram-negative bacterium associated with various gastrointestinal conditions like gastritis, duodenal ulcers, gastric ulcers, and gastric carcinoma. It exhibits unique characteristics in common with Campylobacters and has specific culture and growth requirements

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Oedema is an abnormal accumulation of fluid in body tissues that can lead to various health conditions. This article explores the definition of oedema, its different types (localized and generalized), and the pathogenesis behind it, such as decreased plasma oncotic pressure and increased capillary h

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This content provides valuable information on the pathogenesis of infectious diseases, including definitions, phases of disease progression, types of infections, acute vs. chronic diseases, signs vs. symptoms, steps in pathogenesis, and ways pathogens can enter the body. It discusses the importance

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The pathogenesis of infectious diseases involves the development of a disease caused by a pathogen, with phases like incubation, prodromal, illness, and convalescent periods. Infections can be localized or systemic, acute, subacute, or chronic. Differentiating signs and symptoms, recognizing latent

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A comprehensive guide discussing the definition, pathogenesis, causes, risk factors, clinical features, diagnosis, and management of patients with confusion, as outlined by Consultant Neurologist Dr. Hana Albulaihe. The content covers various aspects including disturbances in attention, cognition, p

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This presentation explores the transfer of foreign DNA into bacteria, discussing mechanisms such as conjugation, transduction, and transformation. It delves into the significance of Mobile Genetic Elements (MGEs) like plasmids, bacteriophages, and transposons in bacterial virulence and pathogenesis.

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Corynebacterium diphtheriae is a non-spore forming Gram-positive bacillus responsible for causing diphtheria in humans. This bacterium, particularly C. diphtheriae, is known for producing a potent exotoxin called diphtheria toxin, which blocks protein synthesis and leads to serious complications suc

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Rheumatic fever is a delayed autoimmune reaction to group A, B-hemolytic streptococcal pharyngitis in genetically susceptible individuals. This condition involves the heart, joints, brain, skin, and serous surfaces. The incidence varies between developing and developed countries, with environmental

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Explore the pathogenesis, features, and management of various pigmentary disorders such as freckles, melanocytic naevi, melasma, and vitiligo. Learn about the causes, clinical characteristics, and treatment options for these common skin conditions.

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Cell, organ, and tissue tropism are crucial in viral pathogenesis, influenced by factors such as routes of entry and spread within the host, cell permissiveness, and immune responses. Viruses penetrate epithelial barriers through various mechanisms to establish infection, navigating specialized cell

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In this detailed lecture, Assistant Professor Dr. Dalya Basil discusses the characteristics, identification methods, growth characteristics, and pathogenesis of Helicobacter pylori. This spiral-shaped, gram-negative rod bacterium is associated with various gastric conditions, including gastritis, ul

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Urolothiasis, commonly known as kidney stones, is a condition where stones form in the urinary system. This article delves into the causes and pathogenesis of urolothiasis according to Ayurveda, discussing how imbalances in the body lead to the formation of stones. The process is explained through A

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Ankylosing spondylitis (AS) is an inflammatory disorder that primarily affects the axial skeleton. The disease causes pain, stiffness, and decreased spinal mobility, and it can lead to disability and decreased quality of life. AS is an autoimmune disease with a complex pathogenesis involving interac

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Eczema, a common skin condition, is characterized by inflammation and disrupting skin homeostasis. It can be classified morphologically and etiologically, with major pathogenesis factors including reduced skin barrier function and abnormal immune response. Atopic dermatitis, a form of endogenous ecz

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