1) Infestation 2) Infestation with chiggers 
Infestation with mites of the genus trombicula, whose larvae carry the rickettsial agent of scrub typhus. ... (12 Dec 1998) ... 
(trom-bik″u-li´ә-sis) infestation with mites of either genus Neotrombicula or Trombicula; it usually occurs in the form of dermatitis when the larval forms (chiggers) attach to the skin of a human, other mammal, or bird.
Type: Term Pronunciation: trom-bik′yū-lī′ă-sis Definitions: 1. Infestation by mites of the genus Trombicula.
[n] - infestation with chiggers
noun infestation with chiggers