Off-host aggregation in the non-fed, female brown dog tick, Rhipicephalus sanguineus (Latreille), is induced by tick excreta and enhanced by low relative humidity.
Med Vet Entomol
; 27(2): 209-15, 2013 Jun.
Article
in En
| MEDLINE
| ID: mdl-22928633
ABSTRACT
We report that Rhipicephalus sanguineus (Ixodida Ixodidae) faeces and its main component, guanine, act as assembly pheromones in short-range Petri plate bioassays. Arrestment activity in response to guanine was lower than that in response to natural excreta, indicating the presence of other active ingredients in natural excreta. The selective removal of appendages was used to establish the important roles played by the palps and the front pair of legs in the detection of the pheromone. Reaction to chemically pure guanine at varying concentrations occurred without a dose response; thus only the presence of guanine, not a critical amount, is required to induce assembly. Higher speed and intensity of clustering occurred at 33% relative humidity (RH). We conclude that female adults of R. sanguineus are more prone to assemble under dry conditions that match the arid microhabitats preferred by this species and that this tendency allows this tick to reside in human dwellings and dog kennels that maintain standards of comfort at 30-50% RH. Cleaning or removing tick excreta-covered surfaces on which ticks aggregate from within and around human dwellings may prove useful as a means of interfering with the establishment of off-host clusters of R. sanguineus.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Rhipicephalus sanguineus
/
Feces
Limits:
Animals
Language:
En
Journal:
Med Vet Entomol
Journal subject:
BIOLOGIA
/
MEDICINA VETERINARIA
Year:
2013
Document type:
Article
Affiliation country:
Estados Unidos