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Table 2 Active and residual non-active transmission foci classification parameters and nominated response interventions adopted in Isabel province surveillance-response SDSS

From: A high-resolution geospatial surveillance-response system for malaria elimination in Solomon Islands and Vanuatu

Focus type

Characteristics

SDSS classification parameters

Nominated response interventions

Residual active

- Transmission occurring in an area of ongoing transmission

All areas within a 3km geographical range of a positive case in an area that has had one or more additional positive recorded case within the last 3 months

Focal screening and treatment

   

Larval source management

 

- Effectively controlled with major reductions recorded after interventions

 

Updated geographical reconnaissance

   

Community Awareness

New active

- Transmission occurring in area that has had transmission for less than 2 years or has never had local transmission - 1st Degree: Only introduced cases present; 2nd Degree: Secondary and indigenous cases present

All areas within a 3km geographical range of a positive case in an area of known transmission but has not had an additional reported case within 3 months

Focal screening and treatment

   

Focal indoor residual spraying Long lasting insecticidal net assessment and re-distribution as required Larval source management Updated geographical reconnaissance Community Awareness

New potential

- Isolated imported, induced or relapse cases occurring only

All areas within a 3km geographical range of an imported positive case in a known receptive area that has not had transmission for a period of 2 years

Focal screening and treatment

   

Focal indoor residual spraying

 

- Receptive area with no transmission for at least 2 years

 

Long lasting insecticidal net assessment and re-distribution as required

   

Larval source management

   

Updated geographical reconnaissance

   

Community Awareness

Residual Non-active

- History of local transmission however not within the last 2 years - Relapses or delayed primary infections with P. vivax or treatment failure of infection before transmission

All areas within a 3km geographical range of a relapsed case in a known receptive area that has not had transmission for a period of 2 years

Focal screening and treatment

   

Direct observed treatment and case follow-up Updated geographical reconnaissance Community Awareness