Effect of body size on the abundance of ectoparasitic mites on the wild rodent Oligoryzomys nigripes

Fernandes, Fernanda Rodrigues; Cruz, Leonardo Dominici; Linhares, Arício Xavier; Zuben, Cláudio José Von

doi:10.1515/ap-2015-0073

Cited by 8 publications

(11 citation statements)

References 38 publications

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“…Additionally, we do not find an association between the abundance and prevalence of G. wolffsohni and the sex and weight of their host. This agrees with other authors who found that Gigantolaelaps peruviana (Ewing) abundance was not related to the sex and weight of its host; however, they found an association in other Laelapidae mites (Fernandes et al 2012(Fernandes et al , 2015.…”

Section: Discussionsupporting

confidence: 92%

“…Even though we did not find association between the abundance and prevalence of G. wolffsohni with the ecoregions, previous studies have determined that these factors can affect its, since different host's densities in different areas influence the frequency of intraspecific contacts (Fernandes et al 2012(Fernandes et al , 2015. In this aspect, O. longicaudatus has been reported as a rodent with high vagility (Palma et al 2007), which means a higher level of dispersion for their parasites (Poulin 2007).…”

Section: Discussionmentioning

confidence: 54%

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New records of Gigantolaelaps wolffsohni (Mesostigmata: Laelapidae) in Chile, an ectoparasite of Oligoryzomys longicaudatus (Rodentia: Cricetidae): ecological aspects and relation to body size and sex of their host

et al. 2022

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The Gigantolaelaps mites (Mesostigmata: Laelapidae) are easily recognized by their large size. In Chile, Gigantolaelaps wolffsohni is the only recognized species Gigantolaelaps and it has only been reported from four localities, always in association with Oligoryzomys longicaudatus. Our research study aimed to contribute to the severely limited information about the ecology and distribution of G. wolffsohni in Chile and determine whether factors such as season, ecological region and weight-and sex of the host influence the abundance of this mite. We captured and assessed 329 O. longicaudatus in different seasons and localities. We classified sampled localities as being part of the Mediterranean, Template Forest, or Magellanic Forest ecoregion due to reported genetic and morphological differences of O. longicaudatus between ecoregions. Information about the season, ecoregion, and weight and sex of the host were recorded during mite sampling. These variables were assessed to determine their influence on mite abundance and prevalence through negative binomial and logistic regression models. We found 19 new localities where G. wolffsohni is distributed in Chile. These mites displayed an aggregated distribution in all ecoregions. We found that biogeography, weight, and sex of the host are not related to the abundance and prevalence of G. wolffsohni. Nonetheless, we found a strong association between the season and the abundance and prevalence of mites. All mites found were females; additionally, we found larva stage inside some female mites. We discussed the relationship between different ecological aspects and the abundance and prevalence of ectoparasites. Also, we discussed the finding of the larvae of G. wolffsohni, which means that this specie is at least larviparous, and finally, we discuss the specificity of Laelapidae mites.

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Section: Discussionsupporting

confidence: 92%

Section: Discussionmentioning

confidence: 54%

New records of Gigantolaelaps wolffsohni (Mesostigmata: Laelapidae) in Chile, an ectoparasite of Oligoryzomys longicaudatus (Rodentia: Cricetidae): ecological aspects and relation to body size and sex of their host

et al. 2022

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“…With more activity and mobility, they have a better chance for increased exposure to ectoparasites and chigger foci in the environment than juvenile animals (Webber et al ., 2015; Matthee et al ., 2020). Another consideration is that animals with a larger body mass or BMI provide a larger surface area for different ectoparasite species to feed on (Fernandes et al ., 2015).…”

Section: Discussionmentioning

confidence: 99%

High prevalence and low diversity of chigger infestation in small mammals found inBangkok Metropolitanparks

Wulandhari

Paladsing

Saesim

et al. 2021

Medical Vet Entomology

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Chiggers are recognized as vectors of scrub typhus disease caused by the bacteria, Orientia tsutsugamushi. The risk of disease exposure is mainly related to chigger bites when humans or animals roam into vector-infested habitats. In big cities, urban public parks could provide areas for the animal-human interface and zoonotic pathogen transmission. The ecology and epidemiology of urban scrub typhus are still poorly understood in Thailand. Small mammals were trapped and examined for chigger infestation in urban public parks across metropolitan Bangkok, Thailand. We found a high prevalence of infestation (76.8%) with surprisingly low diversity. Two chigger species, Leptotrombidium deliense and Ascoschoengastia indica, were identified using morphological characteristics and molecular confirmation. The generalized linear model identified host intrinsic variables (i.e. body mass index) with host density, habitat composition and open field as the extrinsic factors explaining the abundance of chigger infestation. The bacteria O. tsutsugamushi was not detected in chiggers (90 chigger-pooled samples) and animal host tissues (164 spleen samples). However, the existence of chigger vectors calls for the Bangkok Metropolitan Administration and public health authorities to develop a comprehensive scrub typhus monitoring and prevention strategy in the parks and nearby communities.

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“…The structure of the contact networks seems to have had a greater influence on the mite burden in the interaction between G. oudemansi and O. paricola than the rodent characteristics, such as body size, sex and age, although many studies have demonstrated a relationship between these host characteristics and abundance of ectoparasites (Fernandes et al ., 2012, 2015; Hammond et al ., 2019) and endoparasites (Abu-Madi et al ., 2005; Seltmann et al ., 2019; Bellay et al ., 2020).…”

Section: Discussionmentioning

confidence: 99%

“…Heterogeneity in parasite exposure and susceptibility to infection between hosts generate different levels of parasite aggregation among host samples (Poulin, 2013; Gourbière et al ., 2015). Many of the published studies on the interaction of ectoparasite and mammalian hosts have investigated the parasitic burden related to host and parasite traits or environmental characteristics (Perez-Orella and Schulte-Hostedde, 2005; Christe et al ., 2007; Brunner and Ostfeld, 2008; Presley and Willig, 2008; Várfalvyová et al ., 2011; Viljoen et al ., 2011; Fernandes et al ., 2012, 2015; Colombo et al ., 2015; Hammond et al ., 2019; Kiene et al ., 2020).…”

Section: Introductionmentioning

confidence: 99%

Transmission networks and ectoparasite mite burdens in Oecomys paricola (Rodentia: Cricetidae)

2020

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The host contact network structure results from the movement and behaviour of hosts (e.g. degree of sociability; vagility and greater or lesser fidelity of shelters), which can generate heterogeneity in the transmission of parasites and influence the parasitic burden of individual hosts. In the current study, we tested the hypothesis that the burdens of Gigantolaelaps oudemansi mites are related to the characteristics of the transmission networks of individuals of Oecomys paricola, a solitary rodent. The study was carried out in a savannah habitat in north-eastern Brazil. In the dry season, the rodent network presented sub-groups of rodent individuals interacting with each other, whereas in the wet season, no modules were formed in the network. Mite burden was positively related to the number of connections that an individual host had with other host individuals in the dry season. The pairwise absolute difference between the mean mite burdens among individual rodents was negatively correlated with the similarities of node interactions. No relationships were observed during the wet season. There was a higher heterogeneity of mite burden among hosts in the dry season compare to that in the wet season. In solitary species, spatial organization may show seasonal variation, causing a change in the opportunities of host contacts, thereby influencing the transmission and dispersion of their ectoparasite burdens.

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Effect of body size on the abundance of ectoparasitic mites on the wild rodent Oligoryzomys nigripes

Cited by 8 publications

References 38 publications

New records of Gigantolaelaps wolffsohni (Mesostigmata: Laelapidae) in Chile, an ectoparasite of Oligoryzomys longicaudatus (Rodentia: Cricetidae): ecological aspects and relation to body size and sex of their host

New records of Gigantolaelaps wolffsohni (Mesostigmata: Laelapidae) in Chile, an ectoparasite of Oligoryzomys longicaudatus (Rodentia: Cricetidae): ecological aspects and relation to body size and sex of their host

High prevalence and low diversity of chigger infestation in small mammals found inBangkok Metropolitanparks

Transmission networks and ectoparasite mite burdens in Oecomys paricola (Rodentia: Cricetidae)

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