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Eutrombicula alfreddugesi is prevalent across eastern and central North America. There is also evidence of E. alfreddugesi scattered across Central and South. Abstract. I collected larvae of Eutrombicula alfreddugesi for the first time parasitizing Gerrhonotus infernalis, Sceloporus poinsetti, S. jarrovii, and S. grammicus. Padrões de parasitismo por Eutrombicula alfreddugesi (Oudemans) (Acari, Trombiculidae) em três espécies de Tropidurus Wied (Squamata, Tropiduridae) do.

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Differences in the patterns of parasitism among the three lizard species may be related to the morphological and numerical variation of the skin folds especially mite pocketsto the degree of conservation of the host’s habitats, and to selective processes related to reduction of damage to the host’s bodies, to the evolution of mechanisms of decreasing illness transmission by parasites, or even to some behavioral traits of the lizards.

Eutrombicula alfreddugesi adult males travel around their preferred substrate soil, grass, decomposing tree trunks and deposit spermatophores along the way.

When the samples of T. After getting onto a host, the larvae move around very rapidly until they find a fold or another suitably secluded area to begin feeding. Ixodidae and Rhipicephalus decoloratus Infesting Cattle in Uganda. The larval stage actively seeks out vertebrate hosts to parasitize, moving very rapidly. Parasite community arthropods and filarioids associated with wild rodents from the marshes of La Plata River, Argentina.

Evidence suggests that E.

Each analysis was done with all specimens of each species and repeated separately by sex. We performed a linear regression analysis to investigate the relationship between host size SVL and intensity of infestation.

At every stage, E.


The prelarvae then develop into larvae, which is an active, parasitic stage for E. Lastly, legs project from the idiosoma six for larvae, eight for deutonymphs and adults and setae are visible throughout the idiosoma, both dorsally and ventrally. In Eutrombicula alfreddugesithere is no parental investment made by either males or females. The relationship between social life aggregation of lizards and damage caused by parasites has also been explored.


Their results suggest that ectoparasites do not represent a negative factor to denser populations, which would dilute the intensity of infestation across the aggregation. In between the coxae of their first and second pairs of legs, E. The extent of their investment is sexual reproduction.

Eutrombicula alfreddugesi

Seasonal changes in abundance of host-seeking chiggers Acari: One possibility is that guarding and protecting a set of mites may play an important role in decreasing the chances of parasite exchanges alfreddjgesi transmission of diseases. Of the three species, T. In the ventral view of the idiosoma, Claparede’s organs are between the coxae of the first and second pairs of legs.

The lowest intensity of infestation was found in T. Ewing, ; Loomis, ; Mallow, et al. In order to evaluate possible site fidelity, the body of the lizard was divided in 15 sites of parasite infestation Fig.

The Z-test showed that only T. Journal of Medical EntomologyLanham, 30 1: The distribution of larval Eutrombicula alfredcugesi infesting Anolis lizards from different habitats in Hispanola.

The prevalence of E. Larval populations appeared in late April through early May, peaked in abundance in late June and early July, diminished through late summer, and disappeared in midautumn as the ground began to freeze.

Although chigger populations existed eutrombicual the forest edge, larger populations concentrated in short- to tall-grass transition zones. Assuming our samples are representative of the populations from which they were collected, the equal prevalence between sexes for all the species except for T.


Polychrotidae from different habitats on Hispaniola. Microclimatic and vegetative effects on the population size and activity patterns of larval Eutrombicula alfreddugesi Oudemans, Alfredddugesi Sexual variation in intensity of infestation and distribution on the body was also investigated. Eutrombicula alfreddugesi is common across North, Central, and South America and the Caribbean Islands and does not have any conservation status.

Between about and hours, larval E. In this case, even small variation in the eutombicula could have caused the perceived differences between sexes, generating a false result.

Eutrombicula Alfreddugesi

This includes Greenland, the Canadian Arctic islands, and all of the North American as far south as the highlands of central Mexico. A contribution to our knowledge of the bionomics of the common North American chigger, Eutrombicula alfreddugesi Oudemans with a description of a rapid collection method.

These are otherwise known as urstigmata. However, the linear regression test did not confirm the significance of this tendency. Patterns of infestation by chigger mites in four diurnal lizard species from a Restinga habitat Jurubatiba of Southeastern Brazil. Therefore, sexual reproduction in E. Therefore, this lizard may be more prone to lose their ectoparasites during the collecting and fixation handling processes, resulting in a false lower intensity, alfreddugeei perhaps prevalence.

Parasite of the Day: May 28 – Eutrombicula alfreddugesi

Oxford University Press is a department of the University of Oxford. Though we edit our accounts for accuracy, we cannot guarantee all information in those accounts. Sign In Forgot password? In such folds, the larvae are protected from predators.