Viral infectious diseases Flashcards
How does rhinovirus present?
non-specific URI symptoms: fever, malaise, sneezing, nasal congestion (WATERY), sore throat, hoarseness, cough, may have lymphadenopathy
Usually 10 days or less
What would you find on a PE of rhinovirus?
inflamed mucosal surface
What would you recommend for management of rhinovirus?
supportive care! saline wash, NSAIDs, rest, fluids, decongestants, cough suppressants for over 6
What do you NEVER GIVE to kids with a virus?
aspirin
What does giving a kid aspirin with a virus put them at risk for?
Reye syndrome = rapid liver failure
What are the different types of influenza and how do they differ?
A, B, and C
A - mammals
B&C - just humans! with C being more mild
What is the presentation of influenza?
sudden onset of fever, chills, malaise, headache, myalgias especially in the lower extremities and back. May have URI symptoms - sore throat, enlarged cervical nodes, congestion, non productive cough
May have GI symptoms
Which flu commonly has GI symptoms?
Type B
Who is at risk for serious complications of influenza?
asthmatics, nursing home residents, >65, comorbidities, pregnancies
What may you see upon PE of an influenza patient?
May have rales, rhonchi, wheezing. Be aware that consolidation = complication of pneumonia
How can you diagnose influenza?
rapid nasal tests, CBC, PCR
When should you suspect a secondary bacterial infection from influenza?
> 4 days with a productive cough and WBC>10k
How do you manage influenza?
Flu A/B: Oral oseltamivir (NO FOR RISK OF GI BLEEDING)
oral baloxavir (NO pregnancy, <5, immunocomp)
inhaled zanamivir (NO asthma, small children)
IV peramivir (NO children)
chemoprophylaxis
When is chemoprophylaxis a good option for influenza?
early on. Not really beneficial after 48 hours of onset.
REVIEW: herpes simplex virus
cold sores, genital herpes, can have neuralgia, regional lymphadenopathy, treat with anti-virals! consider recommending sunscreen and condoms!!
Does herpes simplex virus have a risk of congenital defect with birth?
YES. It is the H in TORCH and infants are at risk for complications
What are good diagnosis tools for herpes simplex (and other herpes as well)?
fluorescent antibody, viral culture, PCR, Tzanck smear
REVIEW: varicella
trunk –> outwards, “dew drop on a rose petal”, highly pruritic!!! and make sure to isolate patient, consider mitts, and symptomatic treatment!
acyclovir >12 years, calamine lotion for itching, antihistamines
Is varicella dangerous in pregnancy?
YES. Can cause congenital abnormalities
REVIEW: herpes zoster
unilateral along a dermatome of vesicular rash, prodromal tingling, numbness. If involves eyes, REFER. Antivirals!! Corticosteroids can help with lesions
How do you manage post-herpetic neuralgia?
gabapentin, lidocaine, tricyclic antidepressants, capsaicin cream
REVIEW: HPV
warts!! Can be reactivated with smoking, hormonal changes. Can cause cancer
Treat with salicylic acid, cryotherapy, imiquimod, excision, podophyllum resin for men in genital area
How does EBV present?
fever, sore throat, fatigue, malaise, anorexia, myalgia. potentially maculopapular rash similar to hives or petechiae
What happens if EBV is treated with amoxicillin?
diffuse erythematous rash develops in 80% of cases
In what age group is EBV most common?
12-19
What is EBV?
herpes virus 4
What would you see on PE of EBV?
pharynx – enlarged tonsils, exudate, petechiae
Lymphadenopathy
Uvular edema
Splenomegaly (50%), hepatomegaly (10-20%), urticarial/maculopapular (5-15%)
How can you diagnose EBV?
monospot (heterophile test), IgM antibody (IgG will persist for life)
How do you manage EBV?
NO contact sports for 4 weeks due to risk of splenic rupture
supportive - fluids, NSAIDs, rest
resolves in 2-4 weeks