More viral stuffs Flashcards
What are the symptoms of myocarditis?
SOB
Fatigue
CP, palps
What are the two major viruses that are associated with myocarditis?
HHV-6 and B19 Parvovirus
When should you suspect viral endocarditis? How do you diagnose viral myocarditis?
CHF with unknown origin
Endocardial biopsy/NAT
What is the treatment for viral myocarditis?
Supportive
What is the prognosis of viral myocarditis?
50% full recovery
25% changes in heart functions, but asymptomatic
What are the symptoms of mumps? Prodrome?
Swollen, TTP parotid glands
Prodrome malaise/anorexia
What is the family of Mumps? Genome?
Paramyxoviridea
ssRNA
How many serotypes of mumps are there?
One
What are the complications of Mumps? (4)
Meningitis
Orchitis
Deafness
Myocarditis
What is the usual age of onset of mumps (pre vaccine era)?
5-14 yo
What is the life cycle of mumps?
- Silent entry via respiratory tract
- Spread to lymph nodes/salivary glands
- Intermittent silent viremia/spreading
How do you diagnose mumps?
Parotid gland swelling >2 days
Assays to detect viral genomes
What is the treatment for mumps?
supportive
How is mumps spread?
Direct contact with saliva or fomites
What is the prevention technique for mumps?
MMR Vaccine
How is the mumps vaccine given?
IM in MMR
When is the MMR vaccine given?
12-15 months
then again 4-6 yo
(1 yo and kindergarten)
What is the dosage for the mumps vaccine for adults?
1 dose or
2 for high risk
What is the effectiveness of the mump vaccines (varies per dose)?
1 dose = 78%
2 dose = 88%
What are the symptoms of Kaposi’s sarcoma? Pain?
Painless, pink, purple or brown cutaneous lesions
What causes the cutaneous lesions associated with Kaposi’s sarcoma?
Increased proliferation of endothelial cells
What is the histological characteristics of Kaposi’s sarcoma?
Spindle morphology of cells
Kaposi’s sarcoma is associated with what?
Immunosuppression/HIV
Spindle cells morphology = what?
Kaposi’s sarcoma
What are the four forms of Kaposi’s sarcoma?
Classic
Endemic
Immunosuppressed/transplant related
HIV
Classic Kaposi’s sarcoma is (Mild/fatal).
Mild
What are the two forms of endemic Kaposi’s sarcoma?
- Mild, like classic
2. Fatal, in children
What is transplant-related Kaposi’s sarcoma? How is it treated?
Immunosuppressed Kaposi’s sarcoma.
Bring them back to immunocompetent
What is AIDS-related Kaposi’s sarcoma?
More widespread/severe
Lymph node swelling
Weight loss
When is AIDS related Kaposi’s sarcoma particularly fatal?
Lung involvement
What is the virus that causes Kaposi’s Sarcoma? What is the family? Enveloped? Genome?
HHV-8
Herpesviridae
Enveloped
dsDNA
Is HHV8 able to undergo a latent state?
yes
What are the homologus of cellular genes produces by HHV8?
Genes that promote cell cycle
How is HHV8 transmitted?
Sexual route
Needle sharing
What is the treament for HHV8?
Control immunodficiency
Can herpes antivirals be used against HHV8?
NO, because in the latent state
What is the treatment for Kaposi’s sarcoma itself?
Chemo/radiation
What is adult T-cell lymphoma caused by?
HTLV-1 (Human T-cell Leukemia virus 1)
What are the symptoms of T-cell lymphoma? (3)
Papules/tumors
Hepatosplenomegaly
Hypercalcemia
Flower cells are indicative of what? What are they?
T-cell lymphoma
Multilobated nuclei in T cells
Where in the world is T-cell lymphoma found?
South Japan, central africa
What is the median survival time for T-cell lymphoma ?
7 months
How do you diagnose T-cell lymphoma?
Identify HTLV-1 antibodies
What is HAM? (HTLV-1 associated myelopathy) What is it caused by?
Demyelination of neurons within the spinal cord
Likely autoimmune
What are the symptoms of HTLV-1 associated myelopathy? (3)
Stiff gait
Lower extremity weakness
Incontinence
What is the HTLV-I virus family? Genome? Enveloped?
Retroviridae
Enveloped
+ssRNA
What is the life cycle for HTLV-1?
- GLUT-1 receptor mediated endocytosis
2. Otherwise same as HIV
What is the time between infection and ATL development?
30 years
How is HTLV-1 transmitted?
Nursing
Blood transfusion
Sex
What is cell associated viruses? What virus discussed uses this?
Virus transmission needs to occur with cell (cell has to be brought along with the virus to infect)
HTLV-1 uses this
How do you prevent HTLV-1?
Reduce unprotected sex
Discourage nursing in affected areas
What is the treatment for HTLV-1? How effective is this?
Chemo–not very effective
Is the blood supply tested for HTLV-1 in the US?
Yes
What is the key enzyme needed to HTLV-1 replication?
Reverse transcriptase (it’s a retroviridae family member)