Some effects of a tick infestation (Haemaphysalis longicornis) on sheep

Abstract Weight gain, wool production, packed cell volume, and haemoglobin levels (“tick effects„) were reduced in undipped 2‐tooth ewes exposed to a naturally acquired infestation of the tick, Haemaphysalis longicornis . Mean adult tick counts reached a maximum of 27.8 per undipped sheep, the “tick effects” being evident on the 16th and 35th days following this peak. Mean tick counts on a control group of dipped animals were less than two per sheep.