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Disease surveillance PDF Print

WHO recommends standards for surveillance of vaccine-preventable diseases, including acute viral hepatitis.

WHO has also produced a publication on impact assessment through serosurveys. This may be done as a standalone method or as part of a broader evaluation of hepatitis B control. Surveys of this kind have been carried out in a number of areas of the world. The publication is a resource for countries wishing to carry out a hepatitis B survey and is primarily aimed at the lead investigator(s) to assist them in designing the surveys.

WHO-recommended surveillance standard of acute viral hepatitis

Documenting the impact of hepatitis B immunization: Best practices for conducting a serosurvey

 
Disease surveillance PDF Print

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Disease surveillance PDF Print

Containing epidemics and managing cases largely depends on the existence of adequate national epidemiological and laboratory surveillance, which enables early detection of epidemics.

A regional network for surveillance of bacterial meningitis among children less than 5 years of age with an emphasis on Haemophilus influenzae type B (Hib), Streptococcus pneumoniae (the pneumococcus) and Neisseria meningitidis as causative organisms was established in the WHO Eastern Mediterranean Region in 2005. In late 2007, the network was expanded to include other invasive bacterial diseases (pneumonia and sepsis).

Based on the regional standard operational procedures of menengitis in the Region, the case description of meningitis is:

Suspected cases of meningitis are persons who present with the following:

sudden onset of fever (> 38.5°C rectal or > 38°C axillary) and at least one of the following signs:

neck stiffness

bulging fontanel

altered or reduced level of consciousness

convulsions

up to 6 years: any seizure

up to 6 months: 2 generalized brief convulsions within a 24-hour period

poor sucking and irritability (> 2 months old)

prostration or lethargy

toxic appearance

petechial or purpuric rash. 

For children confirmed case is a case that is laboratory-confirmed as meningococcus in the cerebrospinal fluid (CSF) or from the blood.

The regional surveillance of meningitis includes:

case-based reporting form that is filled out for all suspected cases of bacterial meningitis

specimen collection and reporting form that is completed for all specimens forwarded to laboratory investigation

suspected bacterial meningitis log book for all suspected cases of meningitis that includes the minimum data required for surveillance purposes

laboratory log book for CSF and blood specimens that is used to record information on all patients with suspected meningitis, severe pneumonia and sepsis and for whom CSF has been collected.

Any positive Gram stain CSF and positive blood culture results are reported to clinicians within 1 hour after receiving the CSF specimens in the laboratory. 

 
Vaccine and vaccination PDF Print

Measles can be prevented readily by vaccination. Before the widespread use of vaccine, 90% of children had contracted measles by the age of 10 years.

An effective vaccine has been available since the 1960s, and all countries offer measles-containing vaccine in their immunization programmes. Protection is increased after 2 doses, and WHO recommends a 2-dose immunization schedule.

Available measles vaccines are safe and effective. Measles vaccine protects equally well against all wild measles virus strains. Active immunization involves 2 doses of live attenuated measles and it is either only measles vaccine or combined with the vaccines for rubella or mumps and rubella in children.

 
Disease surveillance PDF Print

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