type of small, mobile device for removing and transporting sludge from pit latrines (6)

animals that can be responsible for spread of diseases e.g. mosquitoes, flies, rats(2)

type of latrine fitted with a vent pipe to provide a natural ventilation system that reduces odours and fly nuisance (5)

infectious agents that are not living organisms but are able to invade cells and cause them to manufacture more virus material (2)