Influenza Flashcards
1
Q
Antigenic shift
A
abrupt major change in virus, reuslting in new H/N combinations
2 or more diff strains combine to form a new subtype
2
Q
Swine flu symp
A
abrupt fever upto 41 deg cough tired chills headache sore throat runny nose sneezing diarrhoea stomach upset loss appetite aching muscles limbs or join pain
3
Q
High risk
A
Diabetes severe immunocomp 65yrs older pregnant kids under 6 mnths morbid obesity neurological, hepatic, renal, pulm and chronic cardiac disease
4
Q
Avian flu
A
direct contact infected birds, dead or alive
occasional transmission close contact
5
Q
Influenza incubation
A
2-4 days
6
Q
Transmission
A
airborne- large droplets
contact direct (person to person)
indirect (person to fomite to person)
7
Q
Complications
A
acute bronchitis
secondary bacterial pneumonia
community MRSA
primary viral pneumonia
myositis
encephalitis lethargica
8
Q
Diagnosis
A
viral nose and throar swab chest xray blood culture pulse oximetry resp rate us and es, fbc, crp
9
Q
Curb 65
A
Confusion Urea >7mmol/l Resp rate >30 BP <90/<60 >65 yrs age
think risk secondary bacterial pneumonia
10
Q
Treatment
A
Zanamivir (relenza)- inhaled or IV
oseltamivir (tamiflu)- oral
Antivirals within 48hrs symptom onset
