PMID: 9430107Jan 16, 1998Paper

Stable fly, Stomoxys calcitrans, mouthpart removal influences stress and anticipatory responses in mice

Medical and Veterinary Entomology
Douglas D ColwellT J Lysyk

Abstract

Biting fly attack induces a variety of stress and anxiety related changes in the physiology and behaviour of the target animals. Significant reductions in pain, or more appropriately, nociceptive sensitivity (latency of a foot-lifting response to an aversive thermal stimulus), are evident in laboratory mice after a 1 h exposure to stable flies, Stomoxys calcitrans. The role of the various components of biting fly attack in the development of this stress-induced reduction in pain sensitivity (analgesia) is, however, unclear. This study demonstrates that fly-naive mice do not exhibit a stress-induced analgesia when exposed to stable flies whose biting mouthparts have been removed. In contrast, mice that have been previously exposed to intact stable flies exhibit significant analgesia when exposed to flies that are incapable of biting. However, the level of analgesia induced is lower than that elicited by exposure to intact stable flies. Exposure to nonbiting house flies, Musca domestica, has no effect on nociceptive sensitivity. It appears that the actual bite of the stable fly is necessary for the induction of analgesia and probably other stress and anxiety associated responses in fly naive mice. However, mice rapidly learn to r...Continue Reading

Citations

Dec 2, 1999·Neuroscience and Biobehavioral Reviews·M KavaliersE Choleris
Jun 30, 2009·Veterinary Parasitology·J Owen D Slocombe

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