First report of mites (Gamasida: Laelapidae) parasitic on wild rodents in Uruguay, with new host records

Lareschi, Marcela; Gettinger, Donald; Venzal, José M.; Arzua, Márcia; Nieri-Bastos, Fernanda A.; Barros‐Battesti, Darci Moraes; González, Enrique M.

doi:10.1590/s1519-566x2006000500005

Cited by 6 publications

(10 citation statements)

References 13 publications

(12 reference statements)

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“…Since R. rattus has an opportunistic nidification (Coto 2015) and it could share some arboreal habits with O. longicaudatus (González-Ittig et al 2010; Coto 2015, we believe that this finding is accidental and R. rattus should not (Gettinger 1987; Lareschi et al 2004; Correia 2015; Gettinger and Owen 2016. Gigantolaelaps wolffsohni has been found in the others no Oryzomyini rodents such as Lundomys molitor (Winge), Akodon azarae Fischer, and Bolomys obscurus Waterhouse in Uruguay (Lareschi et al 2006), however, these authors found almost all the mites associated with Oligoryzomys rodents. Previously, G. wolffsohni was found on a single Abrothrix sanborni (Osgood) in Chile (Lareschi and González-Acuña 2010).…”

Section: Discussionmentioning

confidence: 90%

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: Discussionmentioning

confidence: 90%

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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“…Ectoparasites were collected from rodents and shrews by using slight modi cation of the procedures used by Lareschi et al (2006), Oguge et al (2009), Changbunjong et al (2010) and Madinah et al (2011). The sacri ced animals or anesthetized animals were removed from the bag or trap, placed on a special white sheet paper with good contrasting background in the eld and combed from the tail end forward with a ne tooth comb or brush.…”

Section: Methodsmentioning

confidence: 99%

“…However, the actual effect of altitude on the distribution of rat-borne ectoparasites is not readily apparent (MohdZain et al, 2015). Environmental disturbances like re, which can alter the patterns of microhabitat use and species composition of small mammals, also may facilitate the exchange of arthropod ectoparasite among host species (Lareschi et al, 2006).…”

Section: Introductionmentioning

confidence: 99%

Ectoparasites in Small Mammals of Chilalo-Galama Mountains Range: Zoonotic Disease Transmission and One Health Significance

Kasso

2023

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Ectoparasites play a vital role in the transmission of zoonotic diseases and are an essential component of the ecosystem. However, very few studies have been conducted on the ectoparasites of small mammals in Ethiopia, particularly in the Chilalo-Galama Mountains Range. Therefore, this study aimed to determine the species composition, prevalence, distribution, and small mammal host interaction of ectoparasites in the study area. Different traps were used to capture small mammals from where ectoparasites were recovered. The collected ectoparasites were identified to families, genera, and species levels. The parameters like prevalence (P), Abundance (A), mean abundance (MA), Relative Abundance (RA), mean intensity (MI) and constituent ratio (C) were used for the analysis. The study identified disease-carrying ectoparasites based on presence absence of parasite for public and domestic animal health risks. Out of the 204 small mammals examined, 150 were infected by one or more groups of ectoparasites, with an overall prevalence accounting for 73.53%. Out of these individuals the majority 35 (17.16%) were infested by Myobiidae mites followed by Ambyloma 29 (14.22%) and Polyplax 21 (10.29%). Myobiidae mites infested half of the 28 species of hosts examined, followed by Ambyloma (9) and Polyplax(7) species. A total of 1993 individuals of ectoparasites that belonged to 24 taxa in 5 different groups namely flea, lice, tick, mite and flies were recorded. Flea and tick each had five genera, louse six genera, mite six families and bat flies two families were collected from small mammals examined for ectoparasite. Several ectoparasite taxa which have the potential to pose zoonotic disease risks to humans and domestic animals were recorded. The findings underscore the need for further research and surveillance to understand the impact of ectoparasites on small mammal populations and to develop effective strategies for disease control and prevention by promoting the one health approach.

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“…Mysolaelaps is a genus of laelapid mites that preferentially parasitize sigmodontine rodents of the Oryzomyini tribe (Strandtmann and Wharton, 1958), even though, a strong association with the genus Oligoryzomys has been reported (Savchenko et al, 2021). Mysolaelaps has been reported in several countries such as Argentina (Mauri, 1965; Castro et al, 1987; Lareschi and Sánchez-López, 2000; Abba et al, 2001; Lareschi et al, 2003; 2007; Nava et al, 2003; Navone et al, 2009; Lareschi, 2010; Lareschi and Krasnov, 2010; López-Berrizbeitia et al, 2013; Savchenko et al, 2021, Uruguay (Lareschi et al, 2006), Venezuela (Furman, 1972) and Brazil (Linardi et al, 1991). In Chile, M. microspinosus is the only species of the genus recorded to date and its main host is the Long-tailed pygmy rice rat, Oligoryzomys longicaudatus, (Lareschi and González-Acuña, 2010).…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the influence of biotic and abiotic factors on the prevalence and abundance of infestations of Mysolaelaps microspinosus (Fonseca, 1936) (Mesostigmata: Laelapidae) on Oligoryzomys longicaudatus (Bennett, 1832) in Chile

et al. 2023

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The diverse biogeography of Chile provides it an ideal field to study the influence of environmental factors on plant and animal biodiversity. Some small animal species are distributed throughout dissimilar environmental zones, such as the biogeographic provinces, Mediterranean, Temperate Forest and Patagonia. One of these species is Oligoryzomys longicaudatus (Long-tailed pygmy rice rat), which is parasitized by mites of the genus Mysolaelaps (Fonseca, 1936). In this context, the present study describes the parasitic infestation rates of Mysolaelaps microspinosus on O. longicaudatus and evaluates its relationship with biotic factors (sex and host body mass) and abiotic factors (biogeographical province and season). Of 328 O. longicaudatus analyzed, 68 Mysolaelaps positive cases were obtained. Prevalence and mean abundance were 20.7% and 0.708, respectively. Multifactorial logistic and negative binomial regressions were performed to evaluate the effect of biotic and abiotic factors on prevalence and mean abundance. Both rates were significantly and directly related with biogeographic province and season, with higher rates in Mediterranean and Temperate Forest provinces and in winter and spring. The mean abundance had a significant direct relationship with host body mass, describing higher rates on heavier individuals. These results suggest that environmental factors such as temperature and food availability, strongly affect the ecology of M. microspinosus. Here we proposed that the southern limit for the genus in Chile is 47°S, mainly, due to colder temperatures. Also, biotic factors such as the weight of unpregnant hosts are relevant in parasite infestations, due to a greater parasitic load capacity by heavier individuals.

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First report of mites (Gamasida: Laelapidae) parasitic on wild rodents in Uruguay, with new host records

Cited by 6 publications

References 13 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

Ectoparasites in Small Mammals of Chilalo-Galama Mountains Range: Zoonotic Disease Transmission and One Health Significance

Evaluation of the influence of biotic and abiotic factors on the prevalence and abundance of infestations of Mysolaelaps microspinosus (Fonseca, 1936) (Mesostigmata: Laelapidae) on Oligoryzomys longicaudatus (Bennett, 1832) in Chile

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