ABSTRACT
The aim of this study was to identify mite fauna associated with soybean crops and to report new species of the Monsoy 8349 IPRO variety in the municipality of Luís Eduardo Magalhães, western region of Bahia. Samplings were performed in an area with transgenic soybeans, subdivided into three treatments: T01, with no use of agricultural pesticides; T02, complete package of pesticides, except for acaricides; and T03, complete package of pesticides including acaricides. Twenty plants were selected per treatment at each sampling; one apical, one median, and one basal leaf were collected from each plant, totaling 60 leaves per treatment. A total of 1,292 mites were found, belonging to three families, five genera, and six species. The major phytophagous mite species found were Mononychellus planki McGregor and Tetranychus urticae Koch, while the major predatory mites found were Neoseiulus transversus Denmark & Muma and Euseius concordis Chant.
Subject(s)
Animals , Soybeans/parasitology , Pest Control, Biological/methods , Tetranychidae/classification , Mites/classification , BrazilABSTRACT
Abstract The cheyletid mites that parasitize mammals have been neglected for a long time in Brazil, although they can be common on pets and cause injury to their hosts. Recently, Cheyletiella parasitivorax was found parasitizing a rabbit in Brazil which represents a new host and distribution record for the mite species. An illustrated dichotomous key for the identification of the species in this genus and data from the literature are provided.
Resumo Os ácaros da família Cheyletidae que parasitam mamíferos são negligenciados há muito tempo no Brasil, embora eles sejam comuns em animais domésticos. Considerando as dificuldades morfológicas para diagnosticar as espécies dessa família que infestam mamíferos, este estudo refere-se a uma nova ocorrência de Cheyletiella parasitivorax incluindo os poucos registros de literatura. Além disso, também está sendo apresentada uma chave dicotômica ilustrada para identificação de espécies desse gênero.
Subject(s)
Animals , Male , Female , Animals, Domestic/parasitology , Mite Infestations/diagnosis , Mites/classification , Rabbits/parasitology , Species Specificity , Brazil , Classification/methods , Animal Distribution , Mite Infestations/parasitology , Mite Infestations/veterinary , Mites/anatomy & histologyABSTRACT
Abstract Nasal mites (Mesostigmata: Rhinonyssidae) are obligatory endoparasites of birds, and the resulting parasitism can be harmful to the host's respiratory system. The nasal mite Sternostoma tracheacolum Lawrence has caused significant respiratory issues, including serious injuries that possibly cause death of the host. In this study, we report two cases of captive birds parasitized by S. tracheacolum. The first case is a histopathological description of S. tracheacolum parasitizing the Gouldian Finch (Chloebia gouldiae) in the southeast region of Brazil, that showed partially or totally absence of the characteristic respiratory epithelium in trachea lumen. The other describes, for the first time, the parasitism of this species in a canary (Serinus canaria) in the northeast region of the country.
Resumo Os ácaros nasais (Mesostigmata: Rhinonyssidae) são endoparasitos obrigatórios das aves, e este parasitismo pode ser prejudicial ao sistema respiratório de seu hospedeiro. A espécie de ácaro nasal Sternostoma tracheacolum Lawrence tem causado importantes problemas respiratórios, incluindo lesões graves que possivelmente causam a morte do hospedeiro. Neste estudo, relatamos dois casos de aves em cativeiro parasitadas por S. tracheacolum. O primeiro caso é uma descrição histopatológica de S. tracheacolum parasitando um Diamante-de-gould (Chloebia gouldiae) na região sudeste do Brasil, mostrando parcial ou total ausência do epitélio respiratório característico do lúmen da traqueia. O outro descreve, pela primeira vez, o parasitismo desta espécie em um canário (Serinus canaria) na região nordeste do país.
Subject(s)
Animals , Bird Diseases/parasitology , Passeriformes/parasitology , Mite Infestations/veterinary , Mites/classification , Brazil , Passeriformes/classificationABSTRACT
Abstract Ornithonyssus bursa, known as the "tropical fowl mite", is a hematophagous mite of domestic and wild birds, occasionally biting humans. Infestation on humans occurs mainly when the abandoned nests are close to homes, or by manipulation of infested birds by humans. In Brazil, this species occurs in the south and southeast of the country. In the present study we are reporting bites on humans, new localities records, host associations, and molecular information of O. bursa.
Resumo Ornithonyssus bursa, conhecido como "ácaro tropical de galinha", é um ácaro hematófago de aves domésticas e silvestres, ocasionalmente picando humanos. A infestação em humanos ocorre principalmente quando os ninhos abandonados de aves estão próximos de casas, ou pela manipulação de humanos de aves infestadas. No Brasil, esta espécie ocorre na região sul e sudeste do país. No presente estudo, estamos relatando picadas em humanos, registros de novas localidades de ocorrência, novo hospedeiro e informações moleculares de O. bursa.
Subject(s)
Humans , Animals , Dermatitis/parasitology , Mite Infestations/parasitology , Mites/classification , Polymerase Chain Reaction , Mites/genetics , Mites/ultrastructureABSTRACT
Abstract We report the occurrence and infection parameters of two species of nasal mites in Passer domesticus (Linnaeus, 1758) (house sparrow). Nasal passages, trachea, lungs, and air sacs of 100 house sparrows captured in an urban area at the city of Pelotas, State of Rio Grande do Sul, southern Brazil, were examined with a stereomicroscope. The mite, Sternostoma tracheacolum Lawrence, 1948 was present in the trachea and/or lungs (or both) of 13 birds (13%) at a mean intensity of 6.7 mites/infected host. Ptilonyssus hirsti (Castro & Pereira, 1947) was found in the nasal cavity of 1 sparrow (1%); coinfection was not observed in this bird. There was no significant difference in the prevalence and mean intensity of infection of S. tracheacolum between male and female birds. To our knowledge, this is the first study reporting the occurrence of S. tracheacolum in P. domesticus in Brazil and the presence of P. hirsti in P. domesticus from Rio Grande do Sul, Brazil. This is the first survey to provide the infection parameters of each of these mites in house sparrows.
Resumo O objetivo deste estudo foi relatar duas espécies de ácaros nasais parasitos do sistema respiratório de Passer domesticus (Linnaeus, 1758) (pardal) e seus respectivos índices parasitológicos. Para isso, foram examinados ao estereomicroscópio, cavidade nasal, traqueia, pulmão e sacos aéreos de 100 pardais capturados na área urbana de Pelotas, Rio Grande do Sul, Brasil. Sternostoma tracheacolum Lawrence, 1948 ocorreu na traqueia e/ou pulmão de 13 aves (13%) com intensidade média de 6,7 ácaros/hospedeiro infectado e Ptilonyssus hirsti (Castro & Pereira, 1947) na cavidade nasal de um único pardal (1%), não havendo coinfecção. A prevalência e intensidade média de infecção por S. tracheacolum entre hospedeiros machos e fêmeas não apresentou diferença significativa. Este relato caracteriza o primeiro registro de S. tracheacolum parasitando P. domesticus no Brasil e de P. hirsti em pardais no RS, Brasil, e seus respectivos índices de infecção.
Subject(s)
Animals , Male , Female , Bird Diseases/parasitology , Sparrows/parasitology , Mites/classification , Bird Diseases/epidemiology , Brazil/epidemiology , Prevalence , Nasal Cavity/parasitologyABSTRACT
Abstract: Amicrobial pustulosis of the folds is a chronic relapsing neutrophilic dermatosis characterized by sterile pustules compromising skin folds, scalp, face and periorificial regions. It predominantly affects women. Demodicosis is an inflammatory disease associated with cutaneous overpopulation of the mite Demodex spp., the pathogenesis of which is not completely established, but is frequently related to local immunodeficiency. A case of a young woman with amicrobial pustulosis of the folds, and isolated worsening of facial lesions, is reported; investigation revealed overlapping demodicosis. There was complete regression of lesions with acaricide and cyclin treatment. This case warns of a poorly diagnosed but disfiguring and stigmatizing disease, often associated with underlying dermatoses or inadvertent treatments on the face.
Subject(s)
Humans , Animals , Female , Adult , Folliculitis/parasitology , Granuloma/parasitology , Mite Infestations/complications , Mites/classification , Ivermectin/therapeutic use , Doxycycline/therapeutic use , Folliculitis/diagnosis , Folliculitis/drug therapy , Granuloma/diagnosis , Granuloma/drug therapy , Mite Infestations/diagnosis , Mite Infestations/drug therapyABSTRACT
Abstract A first survey of mite species that ectoparasitize bats in the states of Ceará and Mato Grosso was conducted. The specimens of bats and their mites were collected in areas of the Caatinga and Pantanal biomes. A total of 450 spinturnicids representing two genera and ten species was collected from 15 bat species in the Private Reserve of the Natural Patrimony Serra das Almas, Ceará State, Northeast Brazil and 138 spinturnicids represented by two genera and four species were found in seven bats species collected in Private Reserve of the Natural Patrimony Sesc Pantanal, Mato Grosso State, Central-Western Brazil. The occurrence of Cameronieta genus and the species Mesoperiglischrus natali as well as four new associations (Periglischrus iheringi - Chiroderma vizottoi; P. micronycteridis - Micronycteris sanborni; P. paracutisternus – Trachops cirrhosus; Spinturnix americanus - Myotis riparius) are registered for the first time in Brazil.
Resumo Ácaros ectoparasitos de morcegos são reportados pela primeira vez para os Estados do Ceará e Mato Grosso. Os espécimes de morcegos com seus ectoparasitos foram coletados em áreas dos biomas Caatinga e Pantanal. Foi coletado o total de 450 espinturnicídeos representados por dois gêneros e dez espécies sobre 15 espécies de morcegos na Reserva Particular do Patrimônio Natural Serra das Almas, Ceará, Nordeste Brasileiro e em sete espécies de morcegos coletadas na Reserva Particular do Patrimônio Natural Sesc Pantanal, Mato Grosso, Centro-Oeste Brasileiro foram encontrados 138 espinturnicídeos representados por dois gêneros e quatro espécies. A ocorrência do gênero Cameronieta e da espécie Mesoperiglischrus natali, além de quatro novas associações (P. iheringi - Chiroderma vizottoi; Periglischrus micronycteridis - Micronycteris sanborni; P. paracutisternus – Trachops cirrhosus; Spinturnix americanus - Myotis riparius) são registradas pela primeira vez no Brasil.
Subject(s)
Animals , Chiroptera/parasitology , Mite Infestations/veterinary , Mites/classification , Brazil , Ecosystem , Wetlands , Mite Infestations/epidemiologyABSTRACT
Abstract: We herein report human dermatitis caused by the tropical fowl mite Ornithonyssus bursa (Berlese). The cases occurred in an apartment in a residential district of Porto Alegre City, State of Rio Grande do Sul, Brazil, where three members of the same family presented with pruritic lesions on the arms and legs. On inspecting the bathroom, several mites measuring approximately 1.0mm in length were observed coming from a nest of Rufous Hornero, Furnarius rufus (Gmelin). This is the first report of O. bursa in the urban area of Porto Alegre City, from a nest of F. rufus that bites humans.
Subject(s)
Animals , Female , Humans , Male , Dermatitis/parasitology , Mite Infestations , Mites/classification , Strigiformes/parasitologyABSTRACT
Abstract During the period 2010-2012, eighty individuals of Calidris fuscicollis (Vieillot, 1819) were collected on the southern coast of Rio Grande do Sul, Brazil, with the objective of determining the presence of feather mites. Of the 80 birds examined, 32.5% were infested by mites, identified as Avenzoaria calidridis (Oudemans, 1904) (Avenzoariidae) (31.25%), Montchadskiana securicata (Megnin & Trouessart 1884) (Pterolichidae) (22.5%) and Alloptes limosae (Dubinin, 1951) (Alloptidae) (6.25%). This is the first report of feather mites on Calidris fuscicollis in Brazil.
Resumo Durante o período de 2010-2012, oitenta espécimes de Calidris fuscicollis (Vieillot, 1819) foram coletados na costa sul do Estado do Rio Grande do Sul, com o objetivo de determinar a presença de ácaros de pena. Das 80 aves examinadas, 32,5% estavam infestadas por ácaros, os quais foram identificados como Avenzoaria calidridis (Oudemans, 1904) (Avenzoariidae) (31,25%), Montchadskiana securicata (Megnin & Trouessart 1884) (Pterolichidae) (22,5%) e Alloptes limosae (Dubinin, 1951) (Alloptidae) (6,25%). Este é o primeiro relato de ácaros de pena em Calidris fuscicollis no Brasil.
Subject(s)
Animals , Bird Diseases/epidemiology , Charadriiformes , Mite Infestations/veterinary , Mites/physiology , Animal Migration , Bird Diseases/parasitology , Brazil/epidemiology , Feathers/parasitology , Mite Infestations/epidemiology , Mite Infestations/parasitology , Mites/classification , SeasonsABSTRACT
Resumen:Los ácaros se relacionan con pasálidos, estableciendo una asociación temporal para transportarse (foresia). Se conocen más de 200 especies de ácaros forontes de pasálidos. El objetivo del estudio fue conocer la diversidad de ácaros asociados a dos especies de Odontotaenius,así como determinar sus sitios de fijación. Se recolectaron pasálidos de troncos en descomposición en seis estados de México. Se encontraron 80 pasálidos con ácaros (64 de O. zodiacusy 16 de O. striatopunctatus),en total 1 945 ácaros de 13 familias, distribuidos en 42 especies. En O. striatopunctatusse encontraron 562 ácaros (95 $$, 34 c?c?, 197 H, 234 D, 2 T) de 22 especies; mientras que para O. zodiacus,1 383 organismos (300 ??, 204 608 H 139 D, 133 T) de 30 especies. La mayoría se encontraron en las coxas, bajo los élitros y las alas membranosas desarrollando foresia pasiva. La efectividad del muestreo fue mayor en O. zodiacus,lo que se refleja en los índices de diversidad y similitud. El índice de Shannon-Wiener, muestra una mayor diversidad en O. zodiacus(H'= 2.2) que en O. striatopunctatus(H'= 1.94). Odontotaeniuses el género que tiene más especies de ácaros asociados y se registran por vez primera 12 especies: Abrotarsala cuneiformis, A. obesa, A. pyriformis, Brachytremellasp., Diarthrophallus cartwrighti, D. crinatus, Lombardiniellasp., Trichodiplogynium carlosi, T. sahlbergi, T. hirsutumy Trichodiplogyniumsp.
Abstract:Mites can establish association with different arthropods as coleopterans families Scarabaeidae and Passalidae. Passalids are distributed in tropical and templates zones, and until now, more than 200 species of mites have been associated to them. One of the relationships between passalids and mites is the phoresy where one small animal (the phoretic) seeks out and attaches to another animal (the host) for transportation. Herein, we studied the mites associated to O. zodiacusand O. striatopunctatus;for this, 80 Odontotaeniuswith mites were reviewed; passalids were collected in and under decaying logs from six states of Mexico, and were individually kept in vials with 80% ethanol. The specimens were carried to the laboratory and mites removed with fine-pointed forceps under stereo microscope. The mites were stored with 80 % alcohol until some were cleared with lacto-phenol and mounted in Hoyer's solution. We found 1 945 mites belonging to 13 families (Acaridae, Ascidae, Diarthrophallidae, Digamasellidae, Diplogyniidae, Euzerconidae, Heterocheylidae, Histiostomatidae, Klinckowstroemiidae, Laelapidae, Megisthanidae, Trematuridae, and Uropodidae) and 42 species, being the most abundant species Anoetussp. For O. striatopunctatus(16 specimens) we found 562 mites (95 $$, 34 c?c?, 197 hypopus, 234 deutonymph, 2 tritonymph) of 11 families and 22 species; the most abundant were Uropodidae (42 %) and Histiostomatidae (26 %). While for O. zodiacus(64 specimens) were found 1 383 mites (300 $$, 204 c?c?, 608 hypopus, 139 deutonymphs, 133 tritonymphs) of 10 families and 30 species; the most abundant were: Diartrophallidae, Acaridae, and Histiostomatidae (23 % for the two first and 21 % for third). The high abundance and richness was in O. zodiacus,likewise Margalef (S') and Shanon-Winner (H') indexes were higher in this species (O. zodiacusS' = 4.05, H' = 2.2; O striatopunctatusS' = 3.34, H' = 1.94), while Equity (EH) was similar to both hosts (O. zodiacusEH = 0.64; O. striatopunctatusEH = 0.63). The mites were found principally in the protected zone of the passalid's body, as under elytron, membranous wings, and in the clefts of the ventral region of the passalid, and, in minor proportion, on the head and coxal regions. From our findings, 12 species were new records for the Mexican passalids: Abrotarsala cuneiformis, A. obesa, A. pyriformis, Brachytremellasp., Diarthrophallus cartwrighti, D. crinatus, Lombardiniellasp., Trichodiplogynium carlosi, T. sahlbergi, T. hirsutumand Trichodiplogyniumsp., and additional studies may help describe and understand these mites-passalids associations.
Subject(s)
Animals , Female , Male , Coleoptera/parasitology , Mites/physiology , Coleoptera/classification , Mexico , Mites/classification , SymbiosisABSTRACT
AbstractThe present study reports associations between feather mites (Astigmata) and birds in an Atlantic Forest fragment in Rio Grande do Norte state, in Brazil. In the laboratory, mites were collected through visual examination of freshly killed birds. Overall, 172 individuals from 38 bird species were examined, between October 2011 and July 2012. The prevalence of feather mites was 80.8%, corresponding to 139 infested individuals distributed into 30 species and 15 families of hosts. Fifteen feather mite taxa could be identified to the species level, sixteen to the genus level and three to the subfamily level, distributed into the families Analgidae, Proctophyllodidae, Psoroptoididae, Pteronyssidae, Xolalgidae, Trouessartiidae, Falculiferidae and Gabuciniidae. Hitherto unknown associations between feather mites and birds were recorded for eleven taxa identified to the species level, and nine taxa were recorded for the first time in Brazil. The number of new geographic records, as well as the hitherto unknown mite-host associations, supports the high estimates of diversity for feather mites of Brazil and show the need for research to increase knowledge of plumicole mites in the Neotropical region.
ResumoO presente estudo reporta associações entre ácaros (Astigmata) e aves em um fragmento de Mata Atlântica no estado do Rio Grande do Norte, Brazil. Em laboratório, ácaros foram coletados através de examinação visual de aves recentemente mortas. No total, 172 indivíduos de 38 espécies de aves foram examinados entre Outubro de 2011 e Julho de 2012. A prevalência de ácaros na comunidade de aves foi de 80,8%, correspondendo a 139 indivíduos infestados distribuídos em 30 espécies e 15 famílias de hospedeiros. Quinze táxons de ácaros de pena foram identificados em nível de espécie, dezesseis em nível de gênero e três em nível de subfamília, distribuídos nas famílias Analgidae, Proctophyllodidae, Psoroptoididae, Pteronyssidae, Xolalgidae, Trouessartiidae, Falculiferidae and Gabuciniidae. Associações ainda não conhecidas entre ácaros e aves foram registradas para onze táxons identificados em nível específico, e nove táxons foram registrados pela primeira vez no Brasil. O número de novos registros geográficos, assim como as associações ácaro-hospedeiro até então desconhecidas, suportam as altas estimativas de diversidade de ácaros de pena e apontam a necessidade de mais pesquisas que ampliem o conhecimento dos ácaros plumícolas da região Neotropical.
Subject(s)
Animals , Birds , Bird Diseases/epidemiology , Mite Infestations/veterinary , Mites/physiology , Animal Distribution , Biodiversity , Bird Diseases/parasitology , Brazil/epidemiology , Forests , Feathers/parasitology , Mite Infestations/epidemiology , Mite Infestations/parasitology , Mites/classification , PrevalenceABSTRACT
Acarapis mites, including Acarapis woodi, Acarapis externus, and Acarapis dorsalis, are parasites of bees which can cause severe damage to the bee industry by destroying colonies and decreasing honey production. All 3 species are prevalent throughout many countries including UK, USA, Iran, Turkey, China, and Japan. Based on previous reports of Acarapis mites occurring in northeast Asia, including China and Japan, we investigated a survey of Acarapis mite infestations in honey bees in Korean apiaries. A total of 99 colonies of Apis mellifera were sampled from 5 provinces. The head and thorax of 20 bees from each colony were removed for DNA extraction. PCR assays were performed with 3 primer sets, including T, A, and K primers. Results indicated that 42.4% (42/99) of samples were Acarapis-positive by PCR assay which were sequenced to identify species. Each sequence showed 92.6-99.3% homology with reference sequences. Based on the homology, the number of colonies infected with A. dorsalis was 32 which showed the highest infection rate among the 3 species, while the number of colonies infected with A. externus and A. woodi was 9 and 1, respectively. However, none of the Acarapis mites were morphologically detected. This result could be explained that all apiaries in the survey used acaricides against bee mites such as Varroa destructor and Tropilaelaps clareae which also affect against Acarapis mites. Based on this study, it is highly probable that Acarapis mites as well as Varroa and Tropilaelaps could be prevalent in Korean apiaries.
Subject(s)
Animals , Bees/parasitology , Mites/classification , Molecular Sequence Data , Phylogeny , Prevalence , Republic of KoreaSubject(s)
Animals , Ipomoea batatas/parasitology , Mites/physiology , Predatory Behavior , Brazil , Mites/classificationABSTRACT
A total of 81 Tyraniidae birds were examined, 80 Pitangus sulphuratus (Linnaeus, 1766) (Great kiscadee), and one Machetornis rixosa (Vieilot, 1819) (Cattle tyrant), for collection of nasal mites, which were identified as Ptilonyssus spinosus (Brooks & Strandtmann, 1960) and Sternostoma longisetosae (Hyland, 1961) (Rhinonyssidae). This finding characterises the first report of P. spinosus and S. longisetosae in P. sulphuratus, and the first record of P. spinosus in M. rixosa, and expands the geographic distribution of these species. It is the first occurrence of S. longisetosae in the Neotropics, and the first citation of P. spinosus in the state of Rio Grande do Sul, Brazil.
Foram examinadas 81 aves Tyraniidae, 80 Pitangus sulphuratus (Linnaeus, 1766) (Bem-te-vi) e um Machetornis rixosa (Vieilot, 1819) (Suiriri-cavaleiro) para coleta de ácaros nasais, os quais foram identificados como Ptilonyssus spinosus (Brooks & Strandtmann, 1960) e Sternostoma longisetosae (Hyland, 1961) (Rhinonyssidae). Este achado caracteriza o primeiro relato de P. spinosus e S. longisetosae em P. sulphuratus e o primeiro registro de P. spinosus em M. rixosa, e amplia a distribuição geográfica destas espécies, sendo a primeira ocorrência de S. longisetosae na região neotropical e primeira citação de P. spinosus no Rio Grande do Sul, Brasil.
Subject(s)
Animals , Female , Male , Mites/classification , Nasal Cavity/parasitology , Passeriformes/parasitology , Brazil , Passeriformes/classificationSubject(s)
Animals , Birds/microbiology , Mites/classification , Nasal Cavity/microbiology , Brazil , Birds/classificationABSTRACT
The purpose of this study was to elaborate a preliminary list of the mite species associated with rubber trees in the municipality of Santana, in the state of Amapá, Brazil. Two collections of rubber tree leaves were conducted on May 2nd and June 5th , 2010. Twenty-five plants were sampled at random. Three leaves were collected per plant, from the lower third of the crown. The samples were placed in paper bags, packed in an isothermal box chilled gel-based pulp plant (Gelo-X®), and transported to the Entomology Laboratory at Embrapa Amapá, in Macapá. The leaflets were examined under a stereomicroscope, and the mites found on the adaxial and abaxial surfaces of the leaves were collected with a stilet, mounted on microscope slides in Hoyer's medium, and later identified. We collected a total of 1,722 mites of 10 families: Acaridae, Cunaxidae, Eriophyidae, Iolinidae, Phytoseiidae, Stigmaeidae, Tarsonemidae, Tenuipalpidae, Tydeidae, and Winterschmidtiidae, in addition to unidentified species of the suborders Oribatida and Astigmatina. The family Phytoseiidae represented only 2.90% of specimens collected, but showed the highest species richness (5 species). The only representative of Tenuipalpidae was Tenuipalpus heveae Baker, 1945, but 81.13% of the mites collected in this study belonged to this species.
O objetivo deste estudo foi elaborar uma lista preliminar das espécies de ácaros associadas à seringueira, no município de Santana, Estado do Amapá. Foram realizadas duas coletas de folhas de seringueira, nos dias 2 de maio e 5 de junho de 2010. Foram tomadas aleatoriamente 25 plantas, de cada uma das quais foram coletadas três folhas, no terço inferior da copa. As amostras foram acondicionadas em sacos de papel, mantidas em caixa isotérmica refrigerada com gel à base de celulose vegetal (Gelo-X®) e transportadas até o Laboratório de Entomologia da Embrapa Amapá, em Macapá. A triagem dos folíolos foi realizada com o auxílio de estereomicroscópio. Os ácaros encontrados nas faces adaxial e abaxial das folhas foram capturados com um estilete, montados em lâminas de microscopia em meio de Hoyer e, posteriormente, identificados. Foram coletados 1.722 ácaros, pertencentes a dez famílias: Acaridae, Cunaxidae, Eriophyidae, Iolinidae, Phytoseiidae, Stigmaeidae, Tarsonemidae, Tenuipalpidae, Tydeidae e Winterschmidtiidae, além de espécies não identificadas das subordens Oribatida e Astigmatina. A família Phytoseiidae representou apenas 2,90% do total de espécimes coletados, porém apresentou a maior riqueza em espécies (cinco espécies). A família Tenuipalpidae, embora representada apenas por Tenuipalpus heveae Baker, 1945, apresentou o maior número de espécimes capturados (81,13%).
Subject(s)
Animals , Hevea/parasitology , Mites/classification , Brazil , Plant Leaves/parasitologyABSTRACT
The goal of this study was to evaluate the morphometric variation of laelapine populations (Acari, Mesostigmata) associated with neotropical oryzomyine rodents at different geographic localities in Brazil. Three nominal mite species were selected for study, all infesting the pelage of small mammals at different localities in Rio de Janeiro, Espírito Santo, Bahia, and the Federal District, Brazil. To analyse morphometric characteristics, thirty-seven morphological characters distributed across the whole body of each specimen were measured. We use the Analysis of Principal Components, extracting the three first axes and projecting each mite in these axes. Major species level changes in the taxonomy of the host mammals allows an independent examination of morphometric variation of mites infesting a set of distinctly different host species at different geographic localities. Gigantolaelaps vitzthumi and Laelaps differens are associated with oryzomyine rodents of the genus Cerradomys, and consistently showed a tendency to cluster by host phylogeny. Laelaps manguinhosi associated with Nectomys rattus in central Brazil is morphometrically distinct from mites infesting N. squamipes in the coastal restingas of Rio de Janeiro and Espírito Santo. The results obtained here indicate that laelapine mite populations can vary among geographic areas and among phylogenetically related host species. Clearly, the study of these mites at the population level can be an important tool for clarifying the taxonomy of both mites and hosts.
O objetivo deste estudo foi avaliar a variação morfométrica de populações de lelapíneos (Acari, Mesostigmata) associados com pequenos roedores oryzomíneos neotropicais, em diferentes localidades geográficas do Brasil. Três espécies nominais de ácaros foram selecionadas para este estudo, sendo aqueles que infestam a pelagem de pequenos mamíferos em diferentes localidades nos Estados de Rio de Janeiro, Espírito Santo e Bahia, e no Distrito Federal. Para analisar as características morfométricas, 37 caracteres morfológicos, distribuídos por todo o corpo de cada espécime, foram medidos. Nós usamos a Análise de Componentes Principais, extraindo os três primeiros eixos e projetando as medidas de cada ácaro nesses eixos. Mudanças importantes na taxonomia dos mamíferos hospedeiros permitem um exame independente da variação morfométrica de ácaros que infestam um grupo de espécies de hospedeiros distinto, em diferentes localidades geográficas. Gigantolaelaps vitzthumi e Laelapsdifferens estão associados com roedores orizomíneos de gênero Cerradomys e, consistentemente, mostraram uma tendência a se agrupar pela filogenia do hospedeiro. Laelaps manguinhosi associado com Nectomys rattus no Brasil Central é morfometricamente distinto das populações de ácaros que infestam N. squamipes nas restingas costeiras de Rio de Janeiro e Espírito Santo. Os resultados obtidos neste estudo indicam que populações de ácaros laelapíneos podem variar entre áreas geográficas e, especialmente, entre espécies hospedeiras relacionadas filogeneticamente. Claramente, o estudo desses ácaros em nível populacional pode ser uma importante ferramenta para esclarecer a taxonomia tanto dos ácaros quanto de seus hospedeiros.
Subject(s)
Animals , Host-Parasite Interactions , Mites/anatomy & histology , Rodentia/parasitology , Brazil , Mites/classification , Mites/physiology , Rodentia/classificationABSTRACT
Co-adaptation between mites (Arachnida: Klinckowstroemiidae) and Passalidae beteles (Insecta: Coleoptera). Mites of the family Klinckowstroemiidae establish an association with beetles of the family Passalidae known as phoresy. In order to obtain information about this association, we analyzed the relationship between mites of the family Klinckowstroemiidae and beetles of the family Passalidae, as adult mites have been exclusively collected from host beetles. We examined 1 150 beetles collected in seven states of the Mexican Republic, and found 19 species of klinckowstroemiid mites associated with 168 passalids, that belong to 28 different species in 15 genera. Host specificity between species of both groups does not exist, as one species of passalid beetle can have several different symbionts; conversely, a given mite species can associate with passalid beetles of different species and even of different genera. This way, Odontotaenius zodiacus has been found associated with mites of seven species of the genus Klinckowstroemia. Besides, Klinckowstroemia valdezi is associated with five species of passalids. Furthermore, two and even three different species of mites have been found on one host beetle (synhospitality). The lack of congruence between the phylogenies of the mites and that of the beetles indicates that a process of co-adaptation by colonization is going on, because the association is due to the resources that passalid beetles can offer to the mites, like transportation, food and refuge. Since these resources are not host-specific, the klinckowstroemiid mites can climb onto virtually any species of passalid beetles occurring on the same habitat. Rev. Biol. Trop. 60 (2): 599-609. Epub 2012 June 01.
Realizamos un análisis de la relación que existe entre los ácaros Klinckowstroemiidae y los coleópteros Passalidae, puesto que los ácaros adultos se recolectaron exclusivamente sobre pasálidos (huéspedes). Asimismo, examinamos 1 150 coleópteros recolectados en siete estados de la República Mexicana, y encontramos 19 especies de ácaros klinckowstroémidos asociados con 168 de ellos, pertenecientes a 28 diferentes especies de 15 géneros distintos. Estos táxones establecen una relación simbiótica llamada foresia. No existe una especificidad entre las especies de ambos grupos, debido a que una especie de pasálido puede tener varios forontes, y una especie de ácaro puede asociarse a pasálidos de diferentes géneros y especies. Un ejemplo es Odontotaenius zodiacus que presentó a siete especies de Klinckowstroemia asociadas, y por otro lado, Klinckowstroemia valdezi se encuentra asociada a cinco especies de pasálidos. Además, dos o hasta tres especies de ácaros se encontraron sobre un coleóptero huésped (synhospitality). La falta de congruencias entre la filogenia de los ácaros con la de los pasálidos nos indica que se está produciendo un proceso de coadaptación por colonización, y que ésta asociación se debe a los recursos que le brindan los pasálidos a los ácaros: transporte, refugio y alimento. Como estos recursos no son específicos para algún huésped los klinckowstroémidos se suben a cualquier especie de pasálido.
Subject(s)
Animals , Adaptation, Physiological , Coleoptera/parasitology , Host Specificity , Mites/physiology , Symbiosis , Coleoptera/classification , Mites/classificationABSTRACT
Parasitism of the lizard Tropidurus hispidus by Geckobiella sp. and by larvae of Eutrombicula alfreddugesi was examined in a mountainous area in Chapada do Araripe (07° 16' S and 39° 26' W), southern Ceará State, Brazil. Of the 56 lizards collected (26 females, 27 males, and 3 juveniles), 40 (total prevalence of 71.42 percent) were infested by mites. Mite-pockets were the sites most heavily infested by E. alfreddugesi larvae, while Geckobiella sp. was found uniformly distributed under scales over the host's entire body. The female specimens of T. hispidus parasitised by E. alfreddugesi had an average infestation rate of 8.57 ± 3.62, 1-27, while the males had an average infestation rate of 11.90 ± 2.63, 1-25. The female specimens parasitised by Geckobiella sp. had an average infestation rate of 5.91 ± 2.28, 1-25, while the males had an average infestation rate of 5.43 ± 1.52, 1-23. Seven specimens were also infested by eggs and immature forms of unidentified mites (average 2.28 ± 0.89, 1-7). There were no significant differences between the total prevalence of mites on adult male (70.4 percent) and adult female (65.4 percent) lizards. The body sizes of the hosts did not influence their infestation rates. The average infestation intensity by E. alfreddugesi (10.2 ± 8.7) was significantly greater than the average infestation intensity by Geckobiella sp. (5.9 ± 6.8). T. hispidus is the new host record to Geckobiella mites.
No presente estudo foi analisado o parasitismo do lagarto Tropidurus hispidus pelos ácaros Geckobiella sp. e larvas de Eutrombicula alfreddugesi em uma área na Chapada do Araripe (07° 16' S e 39° 26' W), região sul do Estado do Ceará, Brasil. Dos 56 lagartos coletados (26 fêmeas, 27 machos, e 3 juvenis), 40 (prevalência total de 71,42 por cento) estavam infestados por ácaros. Entre os sites de infestação, as bolsas de ácaros foram os mais infestados pelas larvas de E. alfreddugesi, enquanto Geckobiella sp. foi encontrado distribuído uniformemente sob as escamas por todo o corpo dos hospedeiros. Os espécimes fêmeas de T. hispidus parasitados por E. alfreddugesi tinham uma infestação média de 8,57 ± 3,63, 1-27, enquanto os machos tinham uma média de infestação de 11,90 ± 2,63, 1-25. Os espécimes fêmeas parasitados por Geckobiella sp. tinham uma infestação média de 5,91 ± 2,28, 1-25, enquanto que os machos tinham uma infestação média de 5,43 ± 1,52, 1-23. Sete espécimes estavam também infestados por ovos e formas imaturas de ácaros não identificados (infestação média de 2,28 ± 0,89, 1-7). Não houve diferenças significativas entre a prevalência total de ácaros em machos (70,4 por cento) e fêmeas (65,4 por cento) adultas. As médias dos tamanhos corporais não influenciaram as taxas de infestação. A intensidade de infestação média por E. alfreddugesi (10,2 ± 8,7) foi significativamente maior do que a encontrada para Geckobiella sp. (5,9 ± 6,8). T. hispidus constitui um novo registro de hospedeiro para ácaros do gênero Geckobiella.
Subject(s)
Animals , Female , Male , Host-Parasite Interactions , Lizards/parasitology , Mite Infestations/veterinary , Mites/physiology , Brazil , Larva , Mite Infestations/parasitology , Mites/classification , Trombiculidae/physiologyABSTRACT
Em razão da expansão do agronegócio de flores tropicais na região Litoral Sul da Bahia e da inexistência de estudos com ácaros associados a essas culturas na região foram realizadas coletas no período de setembro de 2006 a junho de 2007 em 34 espécies/cultivares de plantas ornamentais tropicais das famílias Costaceae, Heliconiaceae, Musaceae e Zingiberaceae de onze propriedades localizadas em seis municípios (13º 21' a 14º 58' de latitude Sul e 39º 04' a 39º 27' de longitude Oeste), com o objetivo de se determinar a composição de grupos funcionais nos cultivos analisando-se a comunidade no nível de família por meio de índices faunísticos. Os ácaros foram coletados, mensalmente, em folhas e inflorescências. Foram registradas 22 famílias. Mais da metade dos ácaros pertenceu a famílias predominantemente predadoras, com destaque para os fitoseídeos. Com base em índices faunísticos, as famílias Phytoseiidae e Tetranychidae atingiram os índices máximos de dominância, abundância, frequência e constância. Tetraniquídeos (Tetranychus aff. abacae Baker & Pritchard) foram registrados em Alpinia purpurata (Viell.) Schum, Etlingera elatior (Jack) R. M. Smith, Musa coccinea H.C. Andrews, Strelitzia reginae Aiton, Zingiber spectabilis Griffith, Heliconia latispatha Benth., Heliconia rivularis L. Emygd. & E. Santos, Heliconia rostrata Ruiz & Pavon, Heliconia wagneriana Petersen e nos cultivares de helicônias 'Nappi Yellow', 'Jacquinii', 'She', 'Golden Torch', 'Red Opal', 'Alan Carle', 'Fire Bird' e 'Nappi Red'. As espécies/cultivares com maior número de famílias de ácaros foram H. latispatha. H. rostrata. M. coccinea, 'Fire Bird', E. elatior 'Vermelha', Z. spectabilis. E. elatior 'Rosa', A. purpurata 'Vermelha' e helicônias 'Alan Carle', 'Sassy' e 'She'. Não foram detectados nas plantas danos que causassem prejuízos econômicos aos produtores. As pequenas populações de fitófagos sugerem um eficiente controle natural por predadores, patógenos ou outros fatores.
Due to the expansion of the tropical flower agribusiness in the southern coastal region of Bahia State, Brazil, and the lack of studies on mites associated to these cultures in the region, mite surveys were conducted from September 2006 to June 2007 in 34 species/cultivars of ornamental plants of the families Costaceae, Heliconiaceae, Musaceae and Zingiberaceae on 11 properties located in 6 counties (13º 21' to 14º 58' of south latitude and 39º 04' to 39º 27' of west longitude) with the aim of determining the composition of functional groups in the field through the analysis of the community at the family level using faunistic indexes. Mites were collected monthly from leaves and inflorescences. Twenty-two families were recorded. More than half of the mites pertained to predominantly predatory families, mainly to phytoseiids. Based on faunistic indexes, the families Phytoseiidae and Tetranychidae showed the maximum indexes of dominance, abundance, frequency and constancy. Tetranychids (Tetranychus aff. abacae Baker & Pritchard) were reported on Alpinia purpurata (Viell.) Schum, Etlingera elatior (Jack) R. M. Smith, Musa coccinea H.C. Andrews, Strelitzia reginae Aiton, Zingiber spectabilis Griffith, Heliconia latispatha Benth., Heliconia rivularis L. Emygd. & E. Santos, Heliconia rostrata Ruiz & Pavon, Heliconia wagneriana Petersen and on the cultivars of heliconia 'Nappi Yellow,' 'Jacquinii,' 'She,' 'Golden Torch,' 'Red Opal,' 'Alan Carle,' 'Fire Bird' and 'Nappi Red.' The species/cultivars with the largest number of mite families were H. latispatha. H. rostrata. M. coccinea, 'Fire Bird,' E. elatior 'Vermelha,' Z. spectabilis. E. elatior 'Rosa,' A. purpurata 'Vermelha' and heliconias 'Alan Carle,' 'Sassy' and 'She.' No mite-induced economic losses on tropical flower cultures were observed. The low population levels of phytophagous mites suggest an efficient natural control by predators, pathogens and other factors.