Term
List the common childhood viral infections. |
|
Definition
- measles
- Rubella (German measles)
- Erythema infectiosum (Fifth disease)
- Mumps
- Varicella-Zoster (Chickenpox and shingles)
- Coxsackievirus and Echovirus associated infections (hand-food-and-mouth disease)
|
|
|
Term
|
Definition
- paramyxovirus (related to mumps and RSV)
|
|
|
Term
|
Definition
- world wide occurance, epidemics common in NA pre-vaccination but rare now
- larger outbreaks in Canada in recent years
|
|
|
Term
Measles: vaccination institution? |
|
Definition
- instituted in 1963
- 2nd dose vaccine implemented in 1980s when we failed to eliminate completely
|
|
|
Term
Measles: transmission and replication? |
|
Definition
- airborne transmission
- initial replication in respiratory tract and then disseminates (viremia)
|
|
|
Term
Measles: incubation and signs |
|
Definition
- 2 weeks to develop the rash
- maculopapular rash evolves from face to trunk to extremities (including palms and soles)
- Fever and the three Cs: cough, coryza and conjunctivitis
- Koplik spots (sugary spots on mucosa next to molar teeth)
|
|
|
Term
What are the three C's of measles? |
|
Definition
cough, coryza and conjunctivitis |
|
|
Term
What are koplik spots and what infection are they from? |
|
Definition
from measles; they are little sugary spots on mucosa next to molar teeth |
|
|
Term
what are the complications of measles? |
|
Definition
- otitis media
- pneumonia
- encephalitis
- death
third world thousands kids die yearly; common in kids and adults where malnutrition (especially vitamin A) is prevalent |
|
|
Term
Is there a vaccine for measles? If so, describe it. |
|
Definition
yes, a live virus vaccine administered with mumps and rubella (MMR) or with mumps, rubella, and varicella (MMRV) |
|
|
Term
|
Definition
|
|
Term
Rubella virus type and method of transmission? |
|
Definition
RNA virus - Togavirus
spread by respiratory droplets and vertically to fetus |
|
|
Term
Rubella incubation period and signs? |
|
Definition
- rash develops after 2-3 weeks
- infection may be sub-clinical esp in young kids
- rash often mistaken for other rashes and drug rxns
- adenopathy (swollen lymph nodes)
- adults may get mild arthritis
|
|
|
Term
A rash for which disease is often mistaken for other rash illnesses and drug rxns? |
|
Definition
|
|
Term
what is the most severe complication of Rubella and when do most infections and complications occur? |
|
Definition
congenital rubella
- most occur in first 16 wks of pregnancy (85% transmission rate to fetus) |
|
|
Term
What are the defects of congenital rubella? |
|
Definition
- cardiac abnormalities
- cataracts
- deafness
- brain, liver and organ damage
|
|
|
Term
|
Definition
|
|
Term
What disease is also known as the "Fifth Disease"? |
|
Definition
|
|
Term
What is the cause of Erythema infectiosum? |
|
Definition
|
|
Term
What is Erythema Infectiosum method of transmission? What population does it infect? |
|
Definition
- respiratory droplets and vertical (mom to fetus)
- world wide, very common in early childhoot (50% infected by age 19)
|
|
|
Term
What are complications of Erythema infectiosum? |
|
Definition
- "slapped cheek"
- lacy pink rash of extremities
- misscarriage or fetal abnormalities (severe anemia leading to heart failure of fetus)
|
|
|
Term
|
Definition
- symptom of erythema infectiosum
- distinct facial rash sparing the mouth area
|
|
|
Term
Diagnosis of Erythema Infectiosum |
|
Definition
|
|
Term
Is there a vaccine for Erythema Infectiosum? |
|
Definition
|
|
Term
Mumps: viral structure and method of transmission |
|
Definition
paramyxovirus
droplets and fomites contaminated by saliva |
|
|
Term
Mumps: occurance and incubation period? |
|
Definition
occurs world wide, uncommon because of vaccine and especially after second dose MMR
- incubation 2-3 weeks |
|
|
Term
Mumps: complications and symptoms
|
|
Definition
- parotid gland swelling (95%)
- other salivatory gland in 10%
- occasionally: orchitis, meningitis in 15% --> deafness, encephalitis and pancreatitis are rare
|
|
|
Term
|
Definition
best diagnosed by looking for viral RNA in saliva or urine (PCR) |
|
|
Term
Varicella-zoster virus: structure and method of transmission? |
|
Definition
- member of herpesviridae (large icosahedral DNA double stranded)
- airborne route primarily
|
|
|
Term
Is varicella-zoster very infectious? |
|
Definition
YES, very, 90% of non-immune household contacts will become infected |
|
|
Term
what is different about varicella-zoster compared to other herpes viruses? |
|
Definition
almost all infections are SYMPTOMATIC |
|
|
Term
What are the usual characteristics of chickenpox?
Where does virus replication and movement take place? |
|
Definition
- fever and generalized vesicular eruption
- replicated in throught and spread through viremia to skin, reticuloendothelial tissue and rarely to lungs and brain
|
|
|
Term
chicken pox (varicella) incubation period and typical progression of rash? |
|
Definition
- incubation = 11-13 days
- progression = macule, papule, vesicle, pustule, ulcer, crust
|
|
|
Term
if someone has something that looks like dew drops on rose pedal what is it? |
|
Definition
varicella-zoster (macule to pustule?) |
|
|
Term
Complications of chickenpox? |
|
Definition
- pneumonia (15% adults w/ chickenpox)
- disseminated infections of immuno-compromised
- severe infections in newborns (mother not immune)
- CNS involvement (rare: 1:200)
- bacterial superinfection (S. aureus, S. pyogenes)
|
|
|
Term
Shingles: where does it become latent? what are the characteristics of it? |
|
Definition
- becomes latent in dorsal root and cranial nerve ganglia, reactivating later in life
- inflammation of sensory nerve and their ganglia and a localized vesicular rash along the distribution of that nerve
|
|
|
Term
what is the principle comlication of shingles? |
|
Definition
intense post-herpatic neuralgia |
|
|
Term
Diagnosis of varicella-zoster |
|
Definition
- clinical syndrome recognition
- electron microscopy (all herpesviridae look alike)
- virus culture
- viral serology not necessary!
- antibody measurement useful to determine immune status of exposed individual
|
|
|
Term
Is there a vaccine for varicella-zoster? If so, list. |
|
Definition
- YES!
- Chicken pox vaccine
- shingles vaccine
- VZ immune globulin (VZIG): post exposure prophylaxis (congenital or acquired immunodeficiency)
|
|
|
Term
Treatment of varicella-zoster |
|
Definition
- airborne precautions
- ACYCLOVIR or cousine for immune-compromised or pneumonia/CNS infection
|
|
|
Term
Coxsackievirus and Echovirus: structure/family, time of infections and transmission |
|
Definition
- picornavirus
- summer and fall
- fecal-oral
|
|
|
Term
Coxsack and Echovirus: symptoms and other diseases caused by it |
|
Definition
- 50-80% asymptomatic
- skin rash and can mimic other viral infections
- common cause of meningitis, myocarditis
- hand-foot-and-mouth disease
|
|
|
Term
What is hand-foot-and-mouth disease: population affected, cause, and symptoms |
|
Definition
- mostly in kids
- usually Coxsackie A16
- sore throat, vesicles, fever, cutaneous lesions including hand and feet |
|
|