02341nas a2200145 4500008004100000022002500041245006200066210006200128260001600190300001200206490000700218520190000225100002002125856005002145 1988 eng d a0008-4301, 1480-328300aReproductive strategies of ectoparasites on small mammals0 aReproductive strategies of ectoparasites on small mammals cApr-01-1988 a774-7810 v663 a
The effects of disulfiram, benzyl benzoate and DDT, all components of a common preparation (Tenutex) for the control of the head louse, were tested on louse eggs. A significant higher mortality of eggs was evident after treatment with (i) disulfiram, (ii) benzyl benzoate, (iii) these two substances mixed, and (iv) Tenutex. DDT in this concentration had no effect on the survival of the eggs. Long-time exposure to Tenutex and Tenutex without DDT significantly lowered the hatching frequency of eggs. Almost no hatching occurred after exposure for 24 hours. The survival of larvae hatched from eggs treated with Tenutex was lower than for those treated with Tenutex without DDT. DDT seemed to have an effect primarily on the survival of larvae. Newly hatched larvae were more sensitive to the two Tenutex preparations than older larvae.
10aBenzoates/therapeutic use10aDDT10aDrug Therapy, Combination10aegg10ahumans10alarva10aLice Infestations/drug therapy10aPediculus10aResearch Support, Non-U.S. Gov't1 aBrinck-Lindroth, G.1 aLundqvist, Lars1 aNilsson, A. uhttps://phthiraptera.myspecies.info/content/control-human-head-louse-disulfiram-and-benzyl-benzoate-emulsions-laboratory-study02401nas a2200277 4500008004100000245009300041210006900134260000900203300001400212490000700226520146500233653001201698653001301710653001201723653001801735653005901753653001101812653005901823653002101882653001101903653003701914653001101951100002001962700001801982856012302000 1987 eng d00aDispersal in patchy environments: effect on the prevalence of small mammal ectoparasites0 aDispersal in patchy environments effect on the prevalence of sma c1987 a357 - 3670 v343 aPart-time ectoparasites on small mammals disperse via the habitat, while full-time parasites spread throughout the host population by direct contacts between host animals. It is therefore supposed that the effect of the natural environment is different for the two groups. This was studied as differences between observed and expected prevalence, the percentage of the infested host population, during different environmental conditions. Two possible mechanisms of such an effect were analysed, i.e. a) host selection and its change with host frequency and b) parasite migration and reproduction rates as reflected by the frequency distribution patterns on the hosts. As expected the prevalence of full-time ectoparasites (Anoplura and subfamily Laelapinae) could be predicted on the basis of host species frequencies during different environmental conditions, with the exception of one louse species (Hoplopleura acanthopus), because of its restricted distribution. Prediction was not possible for part-time ectoparasites (subfamily Hameogamasinae). Species of the subfamily Haemogamasinae were more catholic in host selection than species of Anoplura and subfamily Laelapinae. The haemogamasin mites changed host species to a greater extent than did Anoplura and Laelapinae. All haemogamasin mites had short-tailed frequency distribution patterns and all Anoplura and Laelapinae, except Hyperlaelaps microti, had long-tailed frequency distributions.
10aanimals10aAnoplura10aFinland10ahost parasite10aLice Infestations/epidemiology/parasitology/veterinary10amammal10aMite Infestations/epidemiology/parasitology/veterinary10aMites/physiology10aNorway10aResearch Support, Non-U.S. Gov't10aSweden1 aLundqvist, Lars1 aEdler, Anders uhttps://phthiraptera.myspecies.info/content/dispersal-patchy-environments-effect-prevalence-small-mammal-ectoparasites00839nas a2200229 4500008004100000245012800041210006900169260002400238490002700262653002300289653001200312653001200324653001100336653002500347653001600372653001300388653002100401653001300422653001300435100002000448856014100468 1985 eng d00aLife tactics and distribution of small mammal ectoparasites (Anoplura, Siphonaptera and Acari) in northernmost Fennoscandia0 aLife tactics and distribution of small mammal ectoparasites Anop bLund, Sweden.c19850 vDoctoral Dissertation.10aBeziehung zum Wirt10abiology10aecology10aEurope10aHoplopleura edentula10aInsectivora10aPolyplax10apolyplax serrata10arodentia10aTroester1 aLundqvist, Lars uhttps://phthiraptera.myspecies.info/content/life-tactics-and-distribution-small-mammal-ectoparasites-anoplura-siphonaptera-and-acari-nor