virology Flashcards
Adenovirus
Shed from eyes/respiratory secretions
Pneumonia in children, respiratory distress, diahrrea
HSV-1
Herpesviridae
dsDNA
Spread through contact with secretions
Oral Herpes
HSV-2
Herpesviridae
dsDNA
Spread through secretions
Genital Herpes, neonatal, encephalitis
Cytomegalovirus (CMV)
Herpesviridae Slow replication spread though contact Shed in saliva, tear, breast milk,urine Asymptomatic or Infectious-Mono-like petichae, hepatosplenomegaly
Epstein-Barr Virus
Herpesviridae
Infectious Mononucleosis (sore throat, fever, lymphadenopathy)
Increased age = increased symptoms
Diagnosed though serological test
Variella Zoster Virus (VZV)
Herpesviridae
Droplet inhalation or contact with lesions
Varicella = chickenpox (children, heals in 1-2 weeks)
Zoster = Shingles (adults, remains latent in cranial ganglia after primary infection; rashes, lesions, pain)
Human Herpesvirus-6
Herpesviridae Roseolla children 6months-2 years fever, rash reactivation in immunocompromised people
Papillomas/warts
Papviridae
High Rick= Type 16, 18
Diagnosis in cytology
Variola (Small Pox)
Poxviridae
rash, fever, lesions on palms/head/soles
Parvovirus
Parvoviridae Smallest DNA virus more common in children "slapped face" rash for up to 2 weeks decreased RBCs (short lived anemia)
Rotavirus
Reoviridae most viral gastroenteritis in kids spread through oral-fecal route Replicates in epithelial cells of microvilli of small intestine, virus shed in stool vomit, diarrhea, fever
Coltivirus
Reoviridae
Colorado Tick Fever (Dengue-like)
Lassa Virus
Arenaviridea
Asymptomatic OR diarrhea/vomiting (hemorrhaging if advanced)
Spread though contact with excretions from rats
Rift Valley Fever Virus
Bunyviridae
Arthropod vector
encephalitis/hepatitis
Hanta Virus
Bunyviridea
Hemorrhagic fever with renal syndrome
Coronavirus
Coronaviridae RNA virus Cold-like symptoms fever, pneumonia SARS
Ebola Virus
Filoviridae
High mortality
Fever, chills, diarrhea, vomit, hemorrhaging of organs
Dengue
Flaviviridea Transmitted by mosquitoes Fever, bone pain ("Break Bone Fever") Self-limiting (1-2 wks) DHF = hemorrhage, shock
Influenza Virus
Orthomyxoviridea
Enveloped with 8 segments of ssRNA
Surface Ag “H” (hemagglutanin) is used to bind to host cells
Vaccination contains 2 strains of Flu A and 1 strain of Flu B (trivalent)
Droplet spread
Antigenic Drift
minor change in antigenic structure
Antigenic Shift
drastic change in antigenic structure
Genetic reassortment
when coinfected with BOTH Avian and human influenza = new strain
Rubulavirus
Paramyxoviridea
ssRNA
MUMPS
spread through droplets
Morbillivirus
Paramyxovirdea Measles (rubeola) Spread by aerosols Resp. tract, lymph nodes Sneezing, coughing, fever "Koplik Spots" (Oral lesions)
RSV
Pneumoviridea
Croup, Bronchitis
infants, nosocomial
droplets/fomites
Enterovirus
Picornaviridea
In areas of poverty/poor hygiene
Aerosol/fomite
nausea, diarrhea
Poliovirus
Picornaviridea
Polio
Coxsackivirus
Hand Foot and Mouth Disease Picornaviridae Fomites, fecal-oral naked viruses sores on tongue/soft palette rash on hands/feet
Rhinovirus
Picornaviridea
small, naked
common cold
aerosols
grows best on human diploid fibroblast cells
Differentiated from Enterovirus with acid buffed (Rhinovirus is acid LABILE, Enterovirus is acid STABLE)
HIV
Retroviridae ssRNA spherical virus with 3-layer structure blood/body fluids life cycle: Targets CD4+ T Cells, mild symptoms, latency period (while virus is reproducing), decreased lymphocytes, swollen lymph nodes, opportunistic infections occur (cancer, histo, toxo) Confirm with Western Blot
Rhabdoviridae
Rabies
Hepatitis A
Naked ssRNA Picornaviridea Fecal-oral route Virus replicates in liver cells, passes into intestine, shed in stool Does NOT cause chronic liver damage
Hepatitis B
Hepadnavirus enveloped ssDNA Blood-borne, semen, vaginal fluid transmitted sexually and pernatal IV drug abusers Fever, hepatic tenderness, jaundice Can lead to carcinoa/cirrhosis HBsAg = HBV
Hepatitis C
Flaviviridae
ssRNA
blood transfusions, IVDA
cirrhosis/hepatic carcinoma
Hepatitis D
Deltavirus
ssRNA
Needs HBV (co-infection)
Hepatitis E
ssRNA
Fecally contaminated water
HBsAG
late incubation and acute
Anti- HBs
Recovery
Anti- HBc IgM
Acute and Convalescent
Anti-HBc Total
Acute, Convalescent, and recovery