MultiInsecticideIndoorSpaceSpraying

The MultiInsecticideIndoorSpaceSpraying intervention class is a node-level intervention that uses Indoor Residual Spraying (IRS) with multiple insecticides. It builds on the IndoorSpaceSpraying class by allowing for multiple insecticides, each with their own specified killing efficacy.

The effectiveness of the intervention is combined using the following equation:

Total efficacy = 1.0 – (1.0 – efficacy_1) * (1.0 – efficacy_2) * … * (1.0 – efficacy_n)

At a glance:

• Distributed to: Nodes

• Serialized: No, it needs to be redistributed when starting from a serialized file.

• Uses insecticides: Yes. It can target subgroups using genomes, especially when targeting certain species.

• Time-based expiration: No

• Purge existing: Yes. If a new intervention is added to to the node, the existing intervention of the same name is removed when the new one is added.

• Vector killing contributes to: Indoor Die After Feeding

• Vector effects: Killing

• Vector sexes affected: Females only

• Vector life stage affected: Adult

Note

Parameters are case-sensitive. For Boolean parameters, set to 1 for true or 0 for false. Minimum, maximum, or default values of “NA” indicate that those values are not applicable for that parameter.

EMOD does not use true defaults; that is, if the dependency relationships indicate that a parameter is required, you must supply a value for it. However, many of the tools used to work with EMOD will use the default values provided below.

JSON format does not permit comments, but you can add “dummy” parameters to add contextual information to your files. Any keys that are not EMOD parameter names will be ignored by the model.

The table below describes all possible parameters with which this class can be configured. The JSON example that follows shows one potential configuration.

Parameter	Data type	Minimum	Maximum	Default	Description	Example
Cost_To_Consumer	float	0	999999	10	The unit cost per trap (unamortized).	{ "Cost_To_Consumer": 4.5 }
Insecticide_Name	string	NA	NA	UNINITIALIZED STRING	The name of the insecticide defined in the configuration parameter Insecticides for this intervention. If insecticides are being used, this must be defined as one of those values; if they are not being used this can be empty. It cannot have a value if you did not configure the configuration parameter Insecticides.	{ "Insecticide_Name": "carbamate" }
Insecticides	array of json objects	None	None	[]	An array of objects defining the blocking and killing efficacy of each insecticide.	{ "Insecticides": [ { "Insecticide_Name": "pyrethroid", "Killing_Config": { "Box_Duration": 300, "Initial_Effect": 1, "class": "WaningEffectBox" } }, { "Insecticide_Name": "carbamate", "Killing_Config": { "Box_Duration": 300, "Initial_Effect": 1, "class": "WaningEffectBox" } } ] }
Killing_Config	json object	NA	NA	NA	The configuration of killing efficacy and waning for human host-seeking trap. Only vectors attracted to the trap by the Attract_Config settings are targeted by the Killing_Config. Specify how this effect decays over time using one of the Waning effect classes.	{ "Killing_Config": { "Box_Duration": 3650, "Initial_Effect": 0.9, "class": "WaningEffectBox" } }
Spray_Coverage	float	0	1	0	The proportion of the node that has been sprayed. This value is multiplied by the current efficacy of the WaningEffect.	{ "Cost_To_Consumer": 4.5 }

{
    "class": "MultiInsecticideIndoorSpaceSpraying",
    "Cost_To_Consumer": 1.0,
    "Spray_Coverage": 1.0,
    "Insecticides": [{
            "Insecticide_Name": "pyrethroid_homo",
            "Killing_Config": {
                "Box_Duration": 100,
                "Decay_Time_Constant": 150,
                "Initial_Effect": 0.95,
                "class": "WaningEffectBoxExponential"
            }
        },
        {
            "Insecticide_Name": "carbamate_homo",
            "Killing_Config": {
                "Box_Duration": 100,
                "Decay_Time_Constant": 150,
                "Initial_Effect": 0.95,
                "class": "WaningEffectBoxExponential"
            }
        }
    ]
}