Node-level interventions

Node-level interventions determine what will be distributed to each node to reduce the spread of a disease. For example, spraying larvicide in a village to kill mosquito larvae is a node-level malaria intervention. Sometimes this can be an intermediate intervention that schedules another intervention. Node-level disease outbreaks are also configured as “interventions”. In the schema, these are labeled as NodeTargeted.

It is also possible (but not required) to configure why a particular intervention is distributed by adding trigger conditions to the intervention. For example, interventions can be triggered by notifications broadcast after some an event, such as Births, NewInfectionEvent, and more. It’s also possible to have one intervention trigger another intervention by asking the first intervention to broadcast a unique string, and having the second intervention be triggered upon receipt of that string. See Event list.

Vector control

The following node-level interventions are commonly used for vector control.

Intervention

Target life stage

Target biting preference

Target biting location

Effect

AnimalFeedKill

node

feeding cycle

animal

killing

ArtificialDiet

feeding cycle

human

all

blocking

InsectKillingFence

feeding cycle

all

all

killing

Larvicides

larva

all

all

killing, reduction

MosquitoRelease

OutdoorRestKill

feeding cycle

human

outdoor

killing

OvipositionTrap

feeding cycle

all

all

killing

ScaleLarvalHabitat

larva

all

all

reduction

SpaceSpraying

feeding cycle

human

outdoor

killing

SpatialRepellent

feeding cycle

all

outdoor

blocking

SugarTrap

adults

all

all

killing

Summary table of node-level interventions

The following table provides an at-a-glance overview of the node-level interventions.

Intervention

Short description

Able to be serialized?

Uses insecticides

Time-based expiration?

Purge existing?

Vector killing contributes to:

Vector effects

AnimalFeedKill

Kill vectors when feeding on animals

Y

Y

Die Before Attempting Human Feed

Killing

ArtificialDiet

Kill vectors when feeding on artificial diet

Y

Attract

BroadcastNodeEvent

Send a node event to node

IndoorSpaceSpraying

IRS for people within a node

Y

Y

Indoor Die After Feeding

Killing

InputEIR

Deliver infectious bites without vectors

Y

Larvicides

Kill larva in node

Y

Y

Larva

Larval killing

MalariaChallenge

Deliver infectious bites or sporozoites with out vectors

MigrateFamily

Schedule trip for family groups in a node

MosquitoRelease

Add vectors to a node

MultiInsecticideIndoorSpaceSpraying

Node IRS involving multiple insecticides

Y

Y

Indoor Die After Feeding

Killing

MultiInsecticideSpaceSpraying

Outdoor spraying involving multiple insecticides

Y

Y

Die Without Attempting To Feed, Die Before Attempting Human Feed

Killing

MultiNodeInterventionDistributor

Distribute multiple interventions instead of one

Y/N

NLHTIVNode

Distribute node intervention on node event

Y/N

NodeLevelHealthTriggeredIV

Distribute individual intervention on individual event

Y

NodePropertyValueChanger

Change the NodeProperty of a node

Outbreak

Not tested with Malaria

OutdoorRestKill

Kill vector after feeding outdoors

Y

Outdoor Die After Feeding

Killing

OvipositionTrap

Kill vector attempting to lay eggs

Y

Die Laying Eggs

Killing

ScaleLarvalHabitat

Modify capacity of larval habitat

Sort of

SpaceSpraying

Outdoor insecticide spraying

Y

Y

Die Without Attempting To Feed, Die Before Attempting Human Feed

Killing

SpatialRepellent

Block vectors before they can attempt to feed on humans

Y

Y

Repelling

SugarTrap

kill vectors when sugar feeding

Y

Y

Y

Emerging, Trap Feeding

Killing