DNA Virus Flashcards
Naked icosahedral
Single-stranded linear DNA virus
Parvovirus
ERYTHEMA INFECTIOSUM (FIFTH DISEASE)
Parvovirus
APLASTIC CRISIS
Parvo Virus
Second trimester: Hydrops Fetalis
Parvo Virus
can be used with aplastic crisis
IVIG
acute hemorrhagic cystitis
Adenovirus
Cowdry type B intranuclear basophilic inclusion bodies
Adenovirus
Naked icosahedral
Double-stranded circular DNA
HPV
Naked icosahedral
Double-stranded circular DNA
Papovaviridae
- Infect squamous cells and induce formation of cytoplasmic vacuole (koilocytes)
HPV
verruca vulgaris
HPV 1,2,3,4
Genital warts (condyloma acuminata
HPV 6,11
Most common viral STD
HPV Condyloma Acuminata HPV 6,11
Carcinoma of the cervix, vulva, penis, anus
HPV 16,18,31,33
Genital warts DOC
Podophylin
Skin warts DOC
Liquid Nitrogen
Plantar Warts DOC
Salicylic acid
small, round, deeply basophilic nuclei surrounded by a clear
halo and pale-staining cytoplasm
Koilocytes - HPV
progressive multifocal leukoencephalopathy in patients with AIDS
JC Polyoma v.
Demyelinating disease that affects the oligodendrocytes characterized by deficits in speech, coordination, and memory
rogressive multifocal leukoencephalopathy -> JC Polyoma v
hemorrhagic cystitis and nephropathy in patients with solid organ (kidney) and bone marrow transplants
BK Polyoma v. (BK - Bladder and Kidney)
Decoy cells
Bk Polyoma
HSV 1 Transmission
Saliva/ Direct
HSV 2 Transmission
Sexually transmitted
TORCH
HSV 2 - Neonatal Hepres
Temporal lobe encephalitis
HSV 1
Site of Latency HSV 1
Trigeminal Ganglia
Site of Latency HSV 2
Lumbosacral Ganglia
HSV Tszanck
Tzanck smear: multinucleated giant cells
Cowdry Type A:
Cowdry Type B:
Type A: HSV, VZV
Type B: Adeno
DOC HSV
Acyclovir - only shortens duration and decreases shedding
the most common cause of sporadic, fatal encephalitis in the USA
HSV 1
VZV Latent site
Dorsal root ganglia
dewdrop on a rose petal appearance’
VZV
begins on trunk; spreads to face and extremities (centrifugal)
Varicella
Complications Varicella
Complications: Pneumonia, Encephalitis, Reye’s syndrome (Asrpirin also)
most common complication of Herpes Zoster/ Shingles
Poestherpitic neuralgia
Reactivation of latent VZV residing within geniculate ganglion
Ramsay Hunt/ Herpes Zoster Oticus
Ramsay Hubt Triad
ipsilateral facial paralysis, ear pain, and vesicles on the face
Cicatrix
Congenital Varicella - 6-12 weeks AOG
Varicella DOC
Given within 24 hours to severe cases only
Ramsay Hunt
Valcyclovir + Prednisone
Active Varicella Vaccine
given within 5 days
Anti VZV Ig
96 h after exposure
o Impair assembly of the MHC class 1-viral peptide complexes
Immediate early proteins of CMV
Most common infectious cause of congenital abnormalities
CMV
Most common intrauterine viral infection
CMV
CMV Most common when the mother is infected
1st Trimester
HETEROPHIL-NEGATIVE MONONUCLEOSIS
CMV
AIDS retinitis
CMV
Giant cells with owl’s-eye nuclear inclusion
CMV
DOC CMV
Gangcylovir
DOC for prevention of CMV disease in solid-organ transplant patients is
Valgancyclovir
Lymphoid and B lymphocytes tgrough CD21
EBV
INFECTIOUS MONONUCLEOSIS
Eeeeepstein Bar EEEnfectious Mono
Kissing disease’
Epstein Bar
Heterophil Positive Mononucleosis
EBV
Rare complication of Infectious Mono
splenic rupture is a rare complication (Avoid contact sports!)
EBV Malignancies
Burkitt’s lymphoma - Africans <3
Nasopharyngeal CA - Chinese
Hairy Leukoplakia - AIDs
elevated “atypical lymphocytes” Downey cells
EBV
Use of this antibipotic in mononucleosis can cause characteristic maculopapular rash
Amoxicillin
- rose-colored macules appear on body after several days of high fever; can present with febrile seizures; usually affects infants
Roseola/ HHV 6
erythematous papules on soft palate and base of the UVULA
Nagayama Spots - HHV6
most common AIDS-related malignancy
Kaposi Sarcoma - HHV 8
Kaposi Sarcoma - HHV 8 Tx
Surgical excision
Radiation
Largest DNA Virus
Pox Virus
Variola Virus
Small Pox
Brick-shaped poxvirus
Variola
Lesions with same stage of development
Variola - Small Pox (Compare to chicken pox -> with different stages)
lesions may become umbilicated or confluent
Small Pox
Cenntrifugal rash
Small Pox, Chicken Pox
Beau’s Lines
Kawasaki Disease
Centripetal
Rocky Mountain Spotty Fever
Guarnieri Bodies
Small Pox
flesh-colored dome-shaped papules with central umbilication
Moluscum contagiosum
Henderson-Patterson bodies:
Moluscum Contagiosum
Moluscum Contagiosum DOC
Cifodovir
DOC Smallpox
Tecovirimat
incomplete circular double-stranded DNA
Hepa B
- the only DNA virus that produces DNA by reverse transcription with mRNA as the template; not a retrovirus but has reverse transcriptase
Hepa B
- hepatocellular injury due to immune attack by cytotoxic T cells
HBV has no cytopathic effect
Hepa B
used as marker of potential infectivity
HBeAg
Extrahepatic Manifestations of Hepa B
Aplastic Anemia
MPGN
Polyarteritis Nodosa
eosinophilic globule of cells that represents a dying hepatocyte often surrounded by normal parenchyma
Councilman Body - Hepa B
Granular eosinophilic “ground glass” appearance IN Liver Biopsy
Hep B
HBsAg, IgM anti-HBc
Acute Infection
HBsAg, IgG anti-HBc
Chronic Infection
HBeAg, HBV DNA
Markers of Replication
DOC Hepa B
LATE Lamivudine Alpha Interferon Tenofovir Entecavir
HBsAg, HbeAg
Incubation Period
HBsAg, HbeAg, IgM
Acute Infection
Only IgM positive
Window
Anti HBs, IgG
Complete Recovery
HBsAg, IgG
Chronic Carrier
HBsAg, IgG, HbeAg
Chronic Active
Anti HBs Only
Vaccinated