Where practicable, exhaust ducts should be at floor level where the concentration of animal residue is highest. The ducts must be made rodent-proof. This level of humidity will also serve to reduce dust levels. Work with animals involving volatile anaesthetics, particularly in an open system, should be done in a fume cupboard. This susceptibility poses some problems for those working with animals.
Animals can carry infectious agents without showing overt illness.
Dogs, cats or monkeys not bred in animal houses are a greater potential hazard, while animals caught in the wild are potentially the most hazardous of all in this regard. 3.2 Safe Working Practice Medical or veterinary advice should be available to all persons handling animals, particularly simians. Generally, persons should only handle sedated simians. All those in contact with animals should be immunised against tetanus and tuberculosis. Masks must be available at all times.