Viral Infections
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Viral Infections conditions
Acquired Immunodeficiency Syndrome (AIDS - HIV)Acquired Immunodeficiency Syndrome (AIDS) results from HIV infection causing progressive CD4+ T cell loss and severe immunosuppression leading to opportunistic infections.Anogenital Warts (HPV)Anogenital warts (HPV) are caused by human papillomavirus infection, presenting as soft, flesh-colored growths on genital and anal skin or mucosa.Aplastic Crisis (Parvovirus B19)Aplastic Crisis (Parvovirus B19) is a sudden severe anemia caused by parvovirus B19 infection suppressing red blood cell production, often in patients with hemolytic disorders.Burkitt Lymphoma (Epstein-Barr Virus - HHV-4)Burkitt Lymphoma linked to Epstein-Barr Virus (HHV-4) is a fast-growing B-cell lymphoma characterized by c-MYC translocation and jaw or abdominal tumors.Cervical Cancer (Human Papillomavirus - HPV)Cervical cancer caused by high-risk human papillomavirus (HPV) strains involves malignant transformation of cervical epithelial cells, often detected by Pap smear.Chickenpox (Varicella-Zoster Virus - HHV-3)Chickenpox (Varicella-Zoster Virus - HHV-3) is a contagious viral infection causing a vesicular rash, fever, and malaise, primarily affecting children and diagnosed by clinical presentation.Chikungunya Fever (Polyarthritis, Rash - Chikungunya Virus)Chikungunya fever causes polyarthritis and rash due to an alphavirus transmitted by Aedes mosquitoes, often presenting with high fever and joint pain.Common Cold (Coronaviruses)Common Cold caused by coronaviruses presents with mild upper respiratory symptoms and is distinguished by its seasonal outbreaks and RNA virus structure.Common Cold (Rhinovirus)The common cold caused by rhinovirus leads to upper respiratory symptoms through viral attachment to nasal epithelial ICAM-1 receptors, triggering inflammation.Congenital Infections (Cytomegalovirus - HHV-5)Congenital cytomegalovirus (CMV) infection causes sensorineural hearing loss and petechiae in newborns due to intrauterine viral transmission and viral inclusion bodies.Congenital Zika Syndrome (Zika Virus)Congenital Zika Syndrome involves fetal brain abnormalities caused by Zika virus infection during pregnancy, leading to microcephaly, neurological defects, and developmental delays.COVID-19 (SARS-CoV-2 - Coronaviruses)COVID-19 (SARS-CoV-2) is a viral respiratory illness caused by a novel coronavirus, presenting with fever, cough, and potential severe respiratory complications.Croup (Paramyxoviruses)Croup (Paramyxoviruses) is a viral respiratory illness causing inflammation of the larynx and trachea, leading to a characteristic barking cough and inspiratory stridor.Dengue Fever (Breakbone Fever) (Flavivirus)Dengue Fever (Breakbone Fever) is a Flavivirus infection causing high fever, severe joint pain, and rash, transmitted by Aedes mosquitoes.Ebola Virus Hemorrhagic Fever (Filoviruses)Ebola Virus Hemorrhagic Fever (Filoviruses) causes severe hemorrhagic fever with high fatality, characterized by viral replication in monocytes and endothelial damage.Encephalitis (HSV-1)HSV-1 encephalitis is a severe brain infection causing temporal lobe inflammation, often diagnosed by PCR detection of viral DNA in cerebrospinal fluid.Erythema Infectiosum (Fifth Disease - Parvovirus B19)Erythema Infectiosum (Fifth Disease) is a childhood rash caused by Parvovirus B19, notable for its slapped-cheek facial rash and mild systemic symptoms.Gastroenteritis (Adenovirus)Adenovirus gastroenteritis causes diarrhea and vomiting primarily in children, characterized by prolonged symptoms and detection of viral antigen in stool.Gastroenteritis (Rotavirus)Gastroenteritis (Rotavirus) is a viral infection causing severe diarrhea and vomiting in infants and young children, diagnosed by stool antigen testing.Genital Herpes (HSV-2)Genital Herpes (HSV-2) is a viral infection causing painful genital sores and blisters, transmitted through sexual contact and diagnosed by PCR or viral culture.Hand-Foot-Mouth Disease (Coxsackievirus Type A)Hand-Foot-Mouth Disease (Coxsackievirus Type A) is a viral illness causing fever, oral ulcers, and vesicular rash on hands and feet, primarily affecting children.Hemorrhagic Cystitis (BK Virus)Hemorrhagic Cystitis (BK Virus) is bladder inflammation causing bleeding, often due to BK virus reactivation in immunocompromised patients, diagnosed by viral PCR.Hemorrhagic Fevers (Lassa Fever - Arenaviruses)Lassa fever, an arenavirus hemorrhagic fever, causes severe multisystem illness with fever and bleeding, transmitted via rodent excreta in West Africa.Hemorrhagic Fevers (Machupo Virus - Arenaviruses)Machupo virus hemorrhagic fever, caused by arenaviruses, leads to severe vascular leakage and hemorrhage, often diagnosed by serology and PCR testing.Hepatitis A Infection (Acute Hepatitis)Hepatitis A infection is an acute viral liver disease caused by HAV, transmitted fecal-orally, often presenting with elevated ALT and jaundice.Hepatitis B Infection (Acute)Acute Hepatitis B infection is a viral liver disease caused by HBV, characterized by elevated ALT and presence of HBsAg, often resolving within six months.Hepatitis B Infection (Chronic)Hepatitis B Infection (Chronic) is a persistent viral infection of the liver caused by hepatitis B virus, leading to inflammation, liver damage, and elevated hepatitis B surface antigen.Hepatitis C Infection (Chronic Liver Disease)Chronic Hepatitis C infection causes progressive liver damage through RNA virus-induced inflammation, often leading to cirrhosis and elevated ALT levels.Hepatitis C Infection (Hepatocellular Carcinoma)Hepatitis C infection causes chronic liver inflammation that can progress to hepatocellular carcinoma, a primary liver cancer often linked to cirrhosis and viral persistence.Hepatitis D (HDV, Requires HBV Co-Infection)Hepatitis D virus (HDV) causes severe liver infection requiring hepatitis B virus (HBV) co-infection for replication and worsens HBV-related liver disease.Hepatitis D Virus Co-InfectionHepatitis D virus co-infection occurs only with hepatitis B infection and worsens liver disease severity by requiring HBV surface antigen for viral assembly.Hepatitis E Infection (Fulminant Hepatitis in Pregnancy)Hepatitis E infection causing fulminant hepatitis in pregnancy is marked by severe liver failure and high maternal mortality, often linked to HEV genotype 1 infection.Herpangina (Coxsackievirus Type A)Herpangina caused by Coxsackievirus Type A involves sudden fever and painful vesicular lesions on the soft palate and tonsillar pillars in children.Human Immunodeficiency Virus (HIV) InfectionHuman Immunodeficiency Virus (HIV) infection causes progressive immune deficiency by targeting CD4+ T cells, leading to increased susceptibility to opportunistic infections.Infectious Mononucleosis (Epstein-Barr Virus - HHV-4)Infectious Mononucleosis caused by Epstein-Barr Virus (HHV-4) presents with fever, pharyngitis, and lymphadenopathy, often showing atypical lymphocytes on blood smear.Influenza (Flu - Influenza Viruses)Influenza (Flu) is a contagious respiratory infection caused by influenza viruses, characterized by fever, cough, sore throat, muscle aches, and fatigue.Influenza (Flu - Orthomyxoviruses)Influenza (Flu - Orthomyxoviruses) is a contagious respiratory infection caused by orthomyxoviruses, presenting with fever, cough, myalgia, and fatigue.Kaposi Sarcoma (HHV-8)Kaposi Sarcoma (HHV-8) is a vascular tumor linked to human herpesvirus 8, commonly seen in immunocompromised patients with characteristic purple skin lesions.Marburg Virus Hemorrhagic Fever (Filoviruses)Marburg Virus Hemorrhagic Fever (Filoviruses) causes severe hemorrhagic fever due to Marburg virus infection, characterized by high fever, bleeding, and multi-organ failure.Measles (Rubeola - Measles Virus)Measles (Rubeola) is a contagious viral infection caused by the measles virus, characterized by fever, cough, conjunctivitis, and a distinctive maculopapular rash.Middle East Respiratory Syndrome (MERS) (Coronaviruses)A viral respiratory illness caused by coronaviruses, MERS presents with severe pneumonia and acute respiratory distress, often linked to camels in the Middle East.Molluscum Contagiosum (Poxvirus)Molluscum Contagiosum (Poxvirus) causes painless, umbilicated papules due to a poxvirus infection, commonly seen in children and immunocompromised patients.Mumps (Parotitis, Orchitis, Aseptic Meningitis - Mumps Virus)Mumps virus causes parotitis, orchitis, and aseptic meningitis, characterized by painful salivary gland swelling and potential testicular inflammation.Nasopharyngeal Carcinoma (Epstein-Barr Virus - HHV-4)Nasopharyngeal carcinoma linked to Epstein-Barr virus (HHV-4) often presents with cervical lymphadenopathy and is prevalent in Southeast Asia.Neonatal Herpes (HSV-2)Neonatal Herpes (HSV-2) is a severe viral infection in newborns caused by herpes simplex virus type 2, often presenting with skin lesions and CNS involvement.Nephropathy (BK Virus)Nephropathy caused by BK virus involves polyomavirus reactivation in kidney transplant patients, leading to tubular injury and potential graft dysfunction.Norovirus GastroenteritisNorovirus gastroenteritis is a viral infection causing acute onset of vomiting, diarrhea, and abdominal cramps, commonly spread through contaminated food or water.Oral Herpes (Cold Sores - HSV-1)Oral Herpes (Cold Sores - HSV-1) is a viral infection caused by herpes simplex virus type 1, leading to painful, recurrent vesicular lesions on the lips and oral mucosa.Pharyngoconjunctival Fever (Adenovirus)Pharyngoconjunctival fever (adenovirus) is a viral infection causing fever, sore throat, and conjunctivitis, commonly linked to adenovirus types 3 and 7.Pneumonia (Adenovirus)Adenovirus pneumonia is a viral lung infection causing fever, cough, and bilateral interstitial infiltrates, often affecting children and immunocompromised hosts.Pneumonia (Cytomegalovirus - HHV-5)Pneumonia caused by cytomegalovirus (HHV-5) often affects immunocompromised patients and is characterized by interstitial infiltrates and viral inclusion bodies.Primary Effusion Lymphoma (HHV-8)Primary Effusion Lymphoma (HHV-8) is a rare lymphoma causing malignant effusions in body cavities, linked to human herpesvirus 8 infection and immunosuppression.Progressive Multifocal Leukoencephalopathy (PML - JC Virus)Progressive Multifocal Leukoencephalopathy (PML) is a demyelinating brain infection caused by JC virus reactivation, primarily affecting immunocompromised patients.Rabies (Rabies Virus)Rabies (Rabies Virus) is a fatal viral encephalitis caused by lyssavirus transmitted through animal bites, leading to neurological symptoms and hydrophobia.Respiratory Syncytial Virus (RSV) InfectionRespiratory Syncytial Virus (RSV) infection causes bronchiolitis in infants, characterized by airway inflammation and mucus buildup leading to respiratory distress.Retinitis (Cytomegalovirus - HHV-5)Retinitis caused by cytomegalovirus (HHV-5) leads to retinal necrosis and vision loss, primarily affecting immunocompromised patients such as those with HIV.Roseola (Exanthem Subitum - HHV-6 & HHV-7)Roseola (Exanthem Subitum) caused by HHV-6 and HHV-7 presents with high fever followed by a sudden rose-pink rash as a key clinical feature in young children.Roseola Infantum (High Fever, Rash - HHV-6 & HHV-7)Roseola Infantum is a viral illness caused by HHV-6 and HHV-7, characterized by sudden high fever followed by a distinctive pink maculopapular rash in infants.Rubella (German Measles - Rubella Virus)Rubella, caused by the rubella virus, is a mild rash illness notable for its teratogenic effects when infection occurs during pregnancy.Rubella (German Measles - Rubella Virus)2Rubella (German Measles) is a viral infection caused by the rubella virus, notable for its mild rash and risk of congenital defects if contracted during pregnancy.SARS (Severe Acute Respiratory Syndrome - Coronaviruses)SARS is a severe respiratory illness caused by coronaviruses, characterized by fever, cough, and rapid progression to pneumonia and acute respiratory distress.Severe Diarrhea in Children (Rotavirus)Severe diarrhea in children caused by rotavirus involves watery stools, vomiting, fever, and dehydration due to viral infection of the intestinal lining.Shingles (Varicella-Zoster Virus - HHV-3)Shingles (Varicella-Zoster Virus - HHV-3) is a painful rash caused by reactivation of latent varicella-zoster virus, presenting with unilateral vesicular eruptions along a dermatome.West Nile Virus (Flavivirus)West Nile Virus (Flavivirus) is a mosquito-borne infection causing fever, headache, and in severe cases, encephalitis or meningitis with possible neurological deficits.Yellow Fever (Flaviviruses)Yellow Fever (Flaviviruses) causes fever, jaundice, and hemorrhage and is transmitted by Aedes mosquitoes in tropical regions.Zika (Flaviviruses)Zika (Flaviviruses) is a mosquito-borne viral infection causing fever, rash, conjunctivitis, and joint pain, with risks of microcephaly in newborns and Guillain-Barré syndrome.