Spm Measles
Transcript of Spm Measles
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MEASLES
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MEASLES - INTRODUCTION
yAlso called as RUBEOLA/ RED SPOTS
yAcute highly infectious disease of childhood
yCaused by MYXOVIRUS
yCLINICAL FEATURES:
fever
catarrhal symptoms of URI
(CORYZA,COUGH)
typical rash
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PROBLEM STATEMENTyEndemic in all parts of world
y
Leading cause of death among vaccine preventable diseases
yCyclical increase in incidence of measles
for every 2-3yrs
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EPIDEMOLOGICAL DETERMINANTS
AGENT
AGENT
ENVIRONMENT
ENVIRONMENTHOST
HOST
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AGENT FACTORSyAGENT:
yCaused by PARAMYXOVIRUS
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AGENT FACTORS
AGENT RNA myxovirus
SOURCE OF INFECTION Case , subclinical measles
INFECTIVE MATERIAL Secretions of
nose,throat,respiratory tract
COMMUNICABILITY Prodromalstage,at the time of
eruption( 4 days before & 5
days after rash)
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HOST FACTORS
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ENVIRONMENTAL FACTORS
yOvercrowding
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TRANSMISSIONyDROPLET infection
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INCUBATIONP
ERIODy10 days from exposure to onset of fever
and 14 days to appearance of rash
yWhen artificially induced, by-passing
respiratory tract incubation period ± 7
days average
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CLINICAL FEATURES
PRODROMAL
ERUPTIVE PHASE
POST-MEASLES
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PRODROMAL STAGEyBEGINS : 10 days after infection
yLASTS : until 14 days
y
CLINICAL FEATURES:fever
coryza with sneezing,cough
nasal discharge
redness of eyes, lacrimation, photophobia
vomitting&diarrhoea
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KOPLIK S SPOTS
yPathognomic of measles
yTable salt crystalsappear on the buccalmucosa opposite to1st& 2nd molar teeth
ySmall, bluish whitespots on red basesmaller than pin head
size
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ERUPTIVE PHASEyCLINICAL FEATURES:
typical dusky-red macular papular
rashes begins behind the ear
spreads rapidly on face & neck
next 2-3 days
lower extremities
KOPLIK SPOTS and TYPICAL RASH
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POST-MEASLES STAGE
yLoss of weight & remain weak
yFailure to recover
y
Growth retardationyDiarrhoea
yCancrumoris
yPy ogenic infections
yCandidosis
yReactivation of pulmonar y TB
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COMP
LICATIONSyMeasles associated diarrhoea
yPneumonia
yOtitis media
yFebrile convulsions
y
Subacutesclerosingpanencephalitis paralysis , involuntary movements, muscle
rigidity & coma
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SSPE
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PREVENTIONyAchieving an
immunisation rate of over 95%
yOn-going immunisation
against measles throughsuccessive generation
change
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3 STAGES OF PREVENTIONyCONTROL:
reduction of incidence to an acceptable level
yOUTBREAK PREVENTION:
aggressive immunisation strategies
yELIMINATION:
reduction of incidence levelto
zero
yWHO defn/: absence of endemic measles for a
period of more than or equal to 12 mon in the
presence of adequate surveillance or
y Incidence<1/100000 population
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ySTRATEGIES:y CATCH UP: 1 time vaccination targeting age
of 9 mon- 14 yrs
yKEEP UP: routine services aimed atvaccinating more than 95% of each successive birth cohort
yFOLLOW UP: subsequent nationwidevaccination campaign conducted every 2-4 yrstargeting usually all children born after the
catch up campaign.
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VACCINATIONy Measles is best prevented b y active immunisation
y Live attenuated vaccines are recommended
y It is safe & effective
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VACCINES
yAll vaccines are TISSUE
CULTURE vaccines
Chick embryo
Human diploid cell
yThe vaccine is presented as
freeze dried product.
It is important to store the
vaccine at recommended temp.
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VACCINATION SCHEDULEyWHO recommends immunisation at 9 months
of age .
y Immunisation before the age of 9 mth rendered
ineffective by natural antibodies throughmothers
y If there is measles outbreak this can be
lowered to 6 mths
if immunised between 6-9mon 2nd dose should
be given on 9thmon provided 4wks after 1st
dose
yVIT-A dropsgiven along with the vaccine
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ADMINISTRATION:Single SC dose of 0.5ml
Diluting fluid for reconstituting the
vaccine must be kept cold at 4 to 80 C
reconstituting vaccine should be kept onice with in one hr
REACTIONS:
fever for 1 to 2 daysrash for 1 to 3 days
due to multiplication of attenuated virus
IMMUNITY: LIFELONG
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CONTRAINDICATIONS:pregnancy
deficient cell mediated immunity
steroids
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ADVERSE EFFECTS OF
VACCINEyToxic shock syndrome occurs when
vaccine is contaminatedused in more than one session on same
day or next day
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COMBINED VACCINEyMMR
y
MMRVyMR
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IMMUNOGLOBULIN:WHO recommended dose is 0.25ml/kg
It should be given within 3 to 4 days of
exposure
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CONTROL MEASURES
Isolation for 7days after
onset of rash
Immunisation of contacts
within 2 days of exposure
Prompt immunisation atthe beginning of an
epidemic
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