Virology (First Aid) Flashcards
Questions
Answers
DNA viruses
“HHAPPPy”
Herpes Hepadnavirus Adenovirus Parvovirus Papillomavirus Polyomavirus Poxvirus
Herpesviruses (7)
HSV-1 HSV-2 VZV EBV CMV HHV-6 HHV-7
Oral (but some genital) lesions
Keratoconjunctivitis
HSV-1
Genital (but some oral) lesions
HSV-2
Mononucleosis and Burkitt’s lymphoma
EBV
Infxn in ICH, esp. transplant Pts
Congential defects
CMV
Roseola (exanthum subitum)
HHV-6
Kaposi sarcoma
HHV-8
Hepadnavirus (1)
Hepatitis B Virus
HBV
Acute or chronic hepatitis
Vaccine available
Not a retrovirus, but has RT
Febrile pharyngitis-Sore throat
Pneumonia
Conjunctivitis (pink eye)
Adenovirus
Parvovirus
Parvo B19
Parvo B19
“slapped cheeks” and lacy, reticular rash
Fifth disease (erythema infectiosum)
Hydrops fetalis (congenital)
Aplastic crisis in sickle cell
“slapped cheeks” rash
Fifth disease (erythema infectiosum)
Hydrops fetalis
Aplastic crisis in sickle cell
Parvo B19
What’s special about Parvo B19?
It’s the only ssDNA virus
Warts, CIN, cervical cancer
HPV
Polyomavirus (2)
JC Virus
BK virus
JC Virus
PML in HIV
progressive multifocal leukonencephalopathy
white matter demyelination–increased MRI enhancement
PML in HIV
progressive multifocal leukonencephalopathy
white matter demyelination–increased MRI enhancement
JC Virus
BK virus
Renal transplant rejection
Hemorrhagic cystitis
Renal transplant rejection
Hemorrhagic cystitis
BK virus
Poxvirus (3)
Smallpox
Vaccinia (cow pox) - “milkmaid’s blisters”
Molluscum contagiosum
Molluscum contagiosum
Umbilicated papular skin lesions
Peds, ICH
Umbilicated papular skin lesions
Peds, ICH
Molluscum contagiosum (Poxvirus)
Name the RNA viruses
Any virus that isn’t “HHAPPPPy” (mnemonic for DNA viruses)
Which DNA virus is the weirdo and why?
Poxviridae
It’s the only one that:
is complex, not icosahedral
doesn’t replicate in nucleus
Picornavirus (5)
“PERCH”
Poliovirus Echovirus Rhinovirus Coxsackievirus Hepatitis A Virus
Secondary spread to CNS (anterior horn cells)
flaccid paralysis (RARE)
Aseptic meningitis
Poliovirus
Poliovirus
Secondary spread to CNS (anterior horn cells)
flaccid paralysis (RARE)
Aseptic meningitis
Salk/Sabin vaccines
Polio
Salk–inactivated vaccine
Sabin–live attenuated
Enterovirus
Coxsackie
Echovirus
Enterovirus
Hand-foot-mouth disease
Cardiac involvement
Aseptic meningitis
Enterovirus
Coxsackie, Echovirus, Enterovirus
Enterovirus
Coxsackie, Echovirus, Enterovirus
Hand-foot-mouth disease
Cardiac involvement
Aseptic meningitis
Hepatitis A Virus
Picornaviridae
Acute Hepatitis
Common cold
Lots of serotypes
Rhinovirus
Calciviridae (2)
Norwalk virus
Hepatitis E Virus
Gastroenteritis
Cruise ships
Food (shellfish)
Norwalk Virus
Reovirus (2)
Reovirus
Rotavirus
Colorado tick fever
Reovirus
Segmented genome
Gastroenteritis, watery diarrhea
1# cause of fatal diarrhea in peds population
Rotavirus
Why is rotavirus so special?
It is the only dsRNA virus
Flavivirus (5)
Hepatitis C Virus
Yellow fever
Dengue
St. Louis encephalitis
West Nile virus
Aedes aegypti mosquito
Jaundice, hemorrhagic disease, Councilman bodies in liver, black vomitus
Monkey or human reservoir
Live attenuated vaccine
Yellow fever
Aedes aegypti mosquito
“break bone fever”
primary infxn: fever, myalgia
secondary infxn: hemorrhagic fever
Dengue fever
Mosquitoes and birds
Fever, meningitis, encephalitis
St. Louis Encephalitis virus
Mosquitoes and birds
Fever
Encephalitis
FLACCID PARALYSIS
West Nile Virus
Togaviruses (3)
Rubella (German Measles)
Eastern Equine Encephalitis
Western Equine Encephalitis
Mild post-natal illness
Congenital:
Blueberry muffin rash deafness cataracts PDA MR
Respiratory/transplacental transmission
Rubella
Birds and mosquitoes
Asx or encephalitis
Western Equine Encephalitis
Birds, horses, mosquitoes
Myalgia, fever, encephalitis
High mortality if neuro involved
Eastern Equine Encephalitis
Retrovirus (2)
HIV
HTLV
T-cell leukemia
myelopathy = tropical spastic parapesis
Tropism for CD-4 cells
HTLV-1
Coronavirus (2)
SARS (triphasic)
Non-SARS (common cold)
Orthomyxovirus (1)
Influenza
fever, HA, myalgia, sore throat
Segmented genome
Genetic drift/shift
Live attenuated and killed vaccine
Influenza
Paramyxoviruses (4)
“PaRaMyxoviruses”
Parainfluenza
RSV
Measles (Rubeola)
Mumps
Croup
Parainfluenza
PV1
Parotid gland swelling
Orchitis
Respiratory Sx’s
Mumps
Bronchiolitis/Respiratory Infxns in infants
Synchtial formation
Peaks in winter
RSV
What do you treat RSV with?
Ribavarin
4C’s
(Cough, coryza–headcold, conjunctivity, Koplick’s spots–tongue)
Confluent maculopaular rash
Subactute sclerosing panencephalitis
Vitamin A
Measles
Subactute sclerosing panencephalitis
Measles
Vitamin A associated virus?
Measles
Rhabdovirus (1)
Rabies
Negri bodies
Bullet-shaped virus
Ascend to CNS: fatal
Bat/raccoon bite: US
Rabies
Negri bodies
Rabies
Bullet-shaped virus
Rabies
What does the location of the Rabies bite tell you about the course of the infxn?
The closer the bite is to the brain, the quicker the course of the disease.
Filoviruses (2)
Marburg
Ebola
Fatal Hemorrhagic Fever
Ebola
Marburg
Arenaviruses (2)
LCV (lymphocytic choriomeningitis)
Lassa
Hemorrhagic disease, shock, deafness, encephalitis
Spread by rodents (esp. mice)
Lassa virus (Arenaviridae)
Segmented genome
Flu-like illness
Aerosolized rodent urine
LCV (lymphocytic choriomeningitis)
Bunyaviruses (2)
California Encephalitis Virus
Hanta Virus
Asx or encephalitis
Mosquitoes and forest animals
California Encephalitis Virus
Pulmonary syndrome
Rodent droppings get aerosolized
SW US region
Hanta Virus
Deltavirus
Hepatitis D Virus
Must be co-infected with Hep B
Hepatitis D Virus
Primary infxn: gingivostomatitis
Secondary infxn:
cold sore
Herpetic whitlow
HSV-1 (oral)
Neonatal HSV Sx’s
SEM
CNS
Disseminated
Tzank prep
PCR
HSV Dx
Atypical lymphocytes
EBV
Heterophile (monospot) test +
EBV
Lymphoproliferative disease in ICH
EBV
Heterophile (monospot) test -
CMV
Jaundice Seizures Microencephaly Intracranial CALCIFICATIONS MR Chorioretinitis Hearing loss
Congenital CMV
Retinitis and esophagitis in AIDS
CMV
CMV in AIDS: Sx’s
Retinitis and esophagitis
Vesicles in different stages
Chicken pox
Varicella
Vesicles in same stage
Smallpox
Poxvirus
Vesicles/lesions on face and trunk
Chickenpox
HPV 6-11
Genital warts
Condyloma accuminata
HPV 16, 18, 31, 45
Cervical cancer
Condyloma lata vs Condyloma accuminata
Lata = syphillis
Accuminata = HPV
Dx of HIV?
Elisa then Western Blot
Live attenuated virus vaccines induce what type of immunity?
Humoral and Cell-mediated
Killed virus vaccines induce what type of immunity?
Humoral
Live attenuated Viruses (7)
MMR--Measles, Mumps, Rubella Sabin (polio) VZV Yellow fever Smallpox
Killed Vaccines (4)
“RIP Always”
Rabies
Influenza
Polio (Salk)
Hepatitis A Virus
Recombinant Vaccine (1)
Hepatitis B
Recombination
Exchange of genes b/w 2 chromosomes by crossover
Reassortment
When viruses with segmented genomes exchange segments.
Influenza pandemics.
Complementation
When 1 of 2 viruses infect a cell and has a mutation that results in a non-functional protein.
The non-mutated virus “complements” the mutated one by making a functional protein that serves both viruses
Phenotype mixing
Simultaneous infxn of a cell w/ 2 viruses.
Packaging can result in a phenotypically mixed virus.
Negative strand viruses (7)
Use RNA pol to transcribe (-) strand.
“Always Bring Polymerase Or Fail Replication Horribly”
Arenavirus Bunyavirus Paramyxovirus Orthomyxovirus Filovirus Rhabdovirus Hepatitis Delta Virus
Segmented Viruses (4)
All are RNA viruses.
“BOAR”
Bunyavirus
Orthomyxovirus (Influenza)
Arenavirus
Reovirus
HSV Identification
Tzanck test: smear of opened skin vesicles (HSV-1, HSV-2, VSV)
Intranuclear Cowdry A inclusions
“Tzank heavens I do not have herpes!”
Hemagglutinin and Neuraminidase Ag’s
Influenza virus
Useful drugs for Influenza A and B (2)
Zanamivir and Oseltamivir
Which leads to more virulent Influenza Virus: Antigenic Shift or Drift?
“Sudden Shift is more deadly than graDual Drift”
Viruses that most commonly infect kids
Paramyxoviruses
Parainfluenza
RSV
Measles
Mumps
Giant cell pneumonia
Measles (Rubeola)
Arboviruses
Transmitted by arthropods (mosquitoes and ticks)
Classic ex’s:
Dengue
Yellow fever
Name the hepatitis:
Fecal-oral route.
Short incubation.
No carriers.
Hepatitis A (picornavirus)
“A: Asymptomatic, Acute, Alone (no carriers)”
Name the hepatitis:
Parenteral, sexual, maternal-fetal transmission.
Long incubation.
Carriers.
Has reverse transcriptase.
Hepatitis B (hepadnavirus)
“B: Blood borne”
Name the hepatitis:
Carried in blood.
Long incubation.
Carriers.
IV Users.
Hepatitis C (flavivirus)
“C: Chronic, Cirrhosis, Carcinoma, Carriers”
Name the hepatitis:
Defective virus, requires HBV.
Requires HBsAg as envelope.
Carriers.
Hepatitis D (Delta virus)
“D: Defective, Dependant”
Name the hepatitis:
Enterically transmitted.
Causes water borne epidemics.
Short incubation.
High mortality in PREGNANT WOMEN.
Hepatitis E (Calciviridae)
“E: Enteric, Expectant mom, Epidemic”
Which hepatitis viruses are transmitted via the fecal-oral route?
A and E.
“The VOWELS hit your BOWELS.”
Name the hepatitis viruses (2):
Chronic active hepatitis
Cirrhosis
Hepatocellular Carcinoma
HBV
HCV
IgG HAVAb
Prior infxn.
Protective against reinfection.
IgM HAVAb
Active hepatitis A.
HBsAg
Surface Ag on HBV.
Continued presence indicates carrier state.
HBsAb
Ab to HBsAg.
Provides immunity to hepatitis B.
HBcAg
Ag associated with core of HBV
HBcAb
Ab to HBcAg.
Positive during window period.
Indicator of recent disease.
IgG HBcAb
Chronic HBV disease
HBeAg
2nd, different antigenic determinant in HBV core
Indicator of active viral replication and transmissibility.
“BEware!”
HBeAb
Ab to HBeAg.
Low transmissibility.
LFTs in Alcoholic vs. Viral Hepatitis
Alcoholic: ALT< AST
Viral: ALT>AST
HIV envelope proteins
gp41 and gp120
What does the HIV virus bind to on T-cells?
CXCR4 and CD4
What does the HIV virus bind to on Macrophages?
CCR5 and CD4
CD4+ count required for AIDS diagnosis?
Less than 200 CD4
HIV+
AIDS indicator conditions
CD4/CD8 ratio < 1.5
ELISA/Western blot tests look for what in HIV?
Antibodies to viral proteins.
Often falsely negative 1-2 months of infection.
Often falsely positive initially in babies born to HIV+ moms