Otpornost pasa na krpelje Rhipicephalus sanguineus i Haemaphysalis leachi leachi

It has been shown experimentally from three repeated infestations that dogs were unable to develop effective resistance against dog ticks: Rhipicephalus sanguineus Latreille, 1806 and Haemaphysalis leachi leachi Audouin, 1826. The number of successive engorged females recovered from dogs at the second and third infestations in both species were not significantly less (P>0.05) than the number recovered at the first infestation. There was also no significant difference in body weight, body dimensions (lengths and breadths) ofengorged females, feeding periods, pre-oviposition periods or egg weight. In-depth studies of host-tick vector interaction and examination of immunobiological parameters involved in order to develop strategies for better, cheaper and safer tick control in dogs as an alternative to the use of acaricides is suggested.Trima ponovljenima pokusnim invazijama potvrđeno je da psi nisu razvili djelotvornu otpornost na pasje krpelje Rhipicephalus sanguineus Latreille, 1806. i Haemaphysalis leachi leachi Audouin, 1826. Broj uspješno presvučenih ženki obje vrste nađenih u pasa u drugoj i trećoj invaziji nije bio značajno manji (P>0,05) od broja ženki u prvoj invaziji. Također, nije bilo značajne razlike u težini, dužini i širini presvučenih ženki, razdoblju hranjenja, dužini razdoblja prije polaganja jaja i težini jaja. Preporučena su iscrpna istraživanja odnosa nositelj - krpelj kao i uključenih imunobioloških pokazatelja radi razvijanja strategije za bolje, jeftinije i sigurnije suzbijanje krpelja u pasa kao alternative za upotrebu akaricida