Besides the acarus of human scabies (Sarcoptes scabiei hominis) (0.3-0.5 mm), many other acari which are parasitic on animals or which infest various plant species, foods, organic waste or soil may occasionally attack man (facultative parasitism vs. obligatory parasitism in the case of scabies).

[…] ---2 months can change a lot--- bringing up '2 years' is ridiculous. 2 months is waitable.

The rest of the town looked like servant’s quarters surrounding the “big house.” And different from everybody else in the town he put off moving in until it had been painted, in and out. And look at the way he painted it—a gloaty, sparkly white.

If we disregard the deactivation energy, which can be done, except, perhaps, for the lowest vibrational levels, then, according to Bates' theoretical computations, the atom-exchange rate constant must be large, ~10⁻¹⁰ cm³sec⁻¹.