Disease BackgroundDisease Background
Diagnosis & managementDiagnosis & management
Prevention and ControlPrevention and Control
Actions to TakeActions to Take
5. Disease BackgroundDisease Background
First account ofFirst account of
sickness diagnosed assickness diagnosed as
YF occurred in 1648.YF occurred in 1648.
Causative agent:Causative agent:
genus Flavivirus.genus Flavivirus.
Vector: Aedes aegyptiVector: Aedes aegypti
Nonhuman primatesNonhuman primates
maintain disease.maintain disease.
6. Global DistributionGlobal Distribution
In 45 countries ofIn 45 countries of
Africa & LatinAfrica & Latin
More than 900 millionMore than 900 million
people are at risk.people are at risk.
200,000 cases &200,000 cases &
30,000 deaths30,000 deaths
worldwide each year.worldwide each year.
11. Host FactorHost Factor
All ages & both sexesAll ages & both sexes
Persons in contact withPersons in contact with
Wood cutters, Hunters.Wood cutters, Hunters.
Immunity-Immunity- One attack ofOne attack of
yellow fever givesyellow fever gives
12. The SEVIR ModelThe SEVIR Model
Humans can be in one of five categories at a time.
*Virus incubating*Virus incubating
***Includes: survivors, victims, Immune***Includes: survivors, victims, Immune
Susceptible Exposed* Infective** Recovered***
13. Environmental FactorEnvironmental Factor
Tropical with a relativeTropical with a relative
Endemic presence ofEndemic presence of
disease in the jungle.disease in the jungle.
Social FactorsSocial Factors
More Populated,More Populated,
14. INCUBATION PERIODINCUBATION PERIOD –– 3-6 days3-6 days
PERIOD OF COMMUNICABILITYPERIOD OF COMMUNICABILITY -- Blood ofBlood of
patients is infective during the first 3-4days.patients is infective during the first 3-4days.
15. Cycles of YFCycles of YF
Jungle Village City
17. Diagnosis &Diagnosis &
Blood studiesBlood studies
Supportive TreatmentSupportive Treatment
IV FluidsIV Fluids
Use of Mosquito-net orUse of Mosquito-net or
mosquito repellents.mosquito repellents.
18. Prevention & ControlPrevention & Control
Immunity begins to appear on theImmunity begins to appear on the77thth
day & lasts for more thanday & lasts for more than 35 years35 years..
International Certificates.International Certificates.