Easily identified by a red, orange or brownish stripe on the abdomen, Redbacks are responsible for by far the most spider bites in Australia.

Unwashables, such as stuffed animals, should be stored in bags for at least 1 week until mites have died

There is an hour or two, after the passengers have embarked, which is disquieting and fussy.[…]Stewards, carrying cabin trunks, swarm in the corridors. Passengers wander restlessly about or hurry, with futile energy, from place to place.

Yeasts, on the other hand, may grow epibiontically on the surfaces of organic particles, in water with high nutrient concentrations, or within guts of various animals.