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1.
Parasitol Res ; 123(1): 85, 2024 Jan 06.
Artigo em Inglês | MEDLINE | ID: mdl-38182760

RESUMO

Rodent ectoparasites are vectors for important pathogens of wildlife, domestic animals, and even zoonosis. Nevertheless, distribution patterns of ectoparasites are not fully understood; habitat, season, and host species are important predictors of distribution and prevalence. Heteromyid rodents are considered important reservoirs of diseases, given the presence of different ectoparasites and pathogens in them, and they offer the opportunity to learn about the ecology of parasites. The aim of the present work was to survey ectoparasites associated with heteromyid rodents near a National Protected Area in Chihuahua Mexico, south of the USA-Mexico border, and asses the effects of ecological factors (season, vegetation type, host species, and host body condition) on parasite infestation. We sampled five different locations from January 2018 to July 2022; 845 heteromyid rodents were examined and 49 fleas and 33 ticks were collected. Ectoparasites belonged to the Siphonaptera and Ixodida orders, including three families Ixodidae (Riphicephalus sanguineus), Pulicidae (Pulex irritans), and Ctenophthalmidae (Meringins altipecten, M. dipodomys). Five species of host rodents were captured, Dipodomys merriami, D. ordii, Chaetodipus eremicus, C. hispidus, and C. intermedius, but the last two species did not present any ectoparasites. Dipodomys merriami presented the highest flea and tick prevalence followed by D. ordii. We found parasitic partnerships between heteromyids according to ecological factors. The infestation in C. eremicus was related to body condition, vegetation type, and sex; in D. merriami, it was related to vegetation type and season, while D. ordii did not present a clear pattern of infestation. Our results suggest that the infestation patterns of heteromyid rodents in desert habitats are species dependent.


Assuntos
Roedores , Sifonápteros , Humanos , Animais , Dipodomys , Zoonoses , Animais Domésticos , Animais Selvagens
2.
Parasitology ; 146(5): 670-677, 2019 04.
Artigo em Inglês | MEDLINE | ID: mdl-30486915

RESUMO

Studies of abundance and distribution of organisms are fundamental to ecology. The identity of host species is known to be one of the major factors influencing ectoparasitic flea abundance, but explanations are still needed regarding how host taxa influence abundance parameters of different flea species. This study was carried out at La Malinche National Park (LMNP), Tlaxcala, Mexico, where previously 11 flea species had been recorded on 8 host species. Our aims were to list micromammal flea species, to determine flea infection parameters [flea prevalence (FP) and flea mean abundance (FMA)] and to analyse the influence of host species on these parameters. A total of 16 species of fleas were identified from 1178 fleas collected from 14 species of 1274 micromammals captured with Sherman® traps from March 2014 to December 2015 in 18 sites at LMNP. Some host species influence FP and FMA, in particular, Microtus mexicanus and Peromyscus melanotis showed particularly higher infection values than other host species. Plusaetis aztecus and Plusaetis sibynus were identified as the most abundant flea species.


Assuntos
Infestações por Pulgas/veterinária , Interações Hospedeiro-Parasita , Doenças dos Roedores/epidemiologia , Roedores , Sifonápteros/fisiologia , Animais , Infestações por Pulgas/epidemiologia , Infestações por Pulgas/parasitologia , México/epidemiologia , Prevalência , Doenças dos Roedores/parasitologia
3.
Zootaxa ; 5410(2): 239-253, 2024 Feb 13.
Artigo em Inglês | MEDLINE | ID: mdl-38480246

RESUMO

A total of 45 flea species, assigned to 22 genera, are documented for the state of Chihuahua, Mexico. Fourteen records are new for the state, five species are recorded for the first time for the country and the state, and the number of species of Mexico is increased to 177 species. Chihuahua now has 25.4% of the total flea species registered for the country. A new species of the genus Strepsylla is described from specimens from the Flora and Fauna Protection Area Cerro del Mohinora, in the northwestern part of the Sierra Madre Occidental. Strepsylla mohinora sp. nov. is included in a published taxonomic key for the species of Strepsylla.


Assuntos
Sifonápteros , Animais , México
4.
Zootaxa ; 3630: 333-46, 2013.
Artigo em Inglês | MEDLINE | ID: mdl-26131515

RESUMO

Six genera of the tribe Phalacropsyllini were analysed based on molecular (18S rDNA and 28S rDNA) and morphological characters, using maximum parsimony analyses and Bayesian inference. The results support the paraphyly of the tribe Phalacropsyllini, as shown in a previous study based only on molecular characters. Three main clades were identified: one includes the genera Neopsylla, Epitedia, Catallagia, and Delotelis; another includes Phalacropsylla and Strepsylla; and a third one includes only Meringis. In order to propose a phylogenetic classification we recognize three tribes, transferring Epitedia, Catallagia and Delotelis to Neopsyllini; keeping Phalacropsyllini only for Phalacropsylla and Strepsylla; and proposing the new tribe Meringini for Meringis.


Assuntos
Filogenia , Sifonápteros/classificação , Sifonápteros/genética , Distribuição Animal , Estruturas Animais/anatomia & histologia , Animais , DNA Ribossômico/genética , Feminino , Masculino , Dados de Sequência Molecular , Roedores/classificação , Roedores/parasitologia , Sifonápteros/anatomia & histologia , Sifonápteros/fisiologia
5.
Zootaxa ; 5032(1): 113-120, 2021 Sep 06.
Artigo em Inglês | MEDLINE | ID: mdl-34811140

RESUMO

A new species of Dactylopsylla Jordan, parasites of Geomyidae rodents from Chihuahua, is described and illustrated as D. samalayucae n. sp. This species is compared with their morphologically closest relatives. Males are characterized by the shape of the upper lobe of the inmovable and movable process, the shape and chaetotaxy of the distal arm of sternum IX and the shape of the crochet; and females by the contour of the distal margin of sternum VII. The geographical distribution of Dactylopsylla is extended to the Chihuahuan desert in Mexico as D. samalayucae n. sp. is reported from south of the Natural Protected Area Mdanos de Samalayuca (MS). A recent key to Dactylopsylla species is updated with inclusion of the new species.


Assuntos
Sifonápteros , Animais , Feminino , Jordânia , Masculino , México
6.
Zootaxa ; 4809(2): zootaxa.4809.2.11, 2020 Jul 07.
Artigo em Inglês | MEDLINE | ID: mdl-33055944

RESUMO

The Flora and Fauna Protection Area (Área de Protección de Flora y Fauna-ÁPFF) Cerro del Mohinora, is the highest mountain in northern Mexico, reaching an elevation of 3,300 meters. It constitutes one of the last high-elevation islands of alpine and subalpine vegetation known in the Sierra Madre Occidental, in the extreme southwestern part of Chihuahua. The ÁPFF Cerro del Mohinora is located near the state border and limits with Durango and Sinaloa. This type of ecosystem located at high altitudes is in danger of disappearing since only 1% or less of its original extension remains; it is considered a refuge for species with boreal affinities (McDonald et al. 2011).


Assuntos
Musaranhos , Animais , Ecossistema , México , Prevalência
7.
Zootaxa ; 4671(4): zootaxa.4671.4.7, 2019 Sep 19.
Artigo em Inglês | MEDLINE | ID: mdl-31716035

RESUMO

A new flea species, Kohlsia misantlensis, is described from the central mountains of Veracruz, Mexico. The hosts of this new species are the Mexican deer mouse Peromyscus mexicanus (Saussure, 1860) (Mammalia: Rodentia:Muridae) and the Mexican spiny pocket mouse Heteromys sp. (Heteromyidae). This flea species is easily recognized by the great development of sternite VIII with a tuft of seven long bristles near the apex. The new species is included in a taxonomic key for the species of genus Kohlsia occurring in Mexico.


Assuntos
Sifonápteros , Animais , Mamíferos , México , Muridae , Peromyscus
8.
Zookeys ; (675): 27-43, 2017.
Artigo em Inglês | MEDLINE | ID: mdl-28769677

RESUMO

A redescription of the genus Phalacropsylla Rothschild is provided. Six species are recognized: Phalacropsylla allos Wagner, P. hamata Tipton and Mendez, P. morlani Eads and Campos, P. nivalis Barrera and Traub, P. oregonensis Lewis and Maser, and P. paradisea Rothschild. Phalacropsylla hamata is designated herein as a junior synonym of P. paradisea. The distribution of P. paradisea is more extensive than previously thought, extending from Arizona through southern Colorado, into New Mexico, Texas, and northern Mexico (State of Nuevo León). It is the least host-specific of all species of Phalacropsylla, occurring on 13 different host species including cricetid, heteromyid, murid, and sciurid rodents and several carnivores, although it most commonly occurs on Neotoma albigula Hartley. The range of P. oregonensis is expanded from eastern Oregon to southeastern Idaho. Numerous records are documented for the most common and ubiquitous species, P. allos, which is found in British Columbia, central to northern California, Idaho, Montana, Colorado, Nevada, Utah, Wyoming, Arizona, and New Mexico. Neotoma cinerea Ord is the principal host of P. allos. Phalacropsylla allos is a winter flea west of the Rocky Mountains, but it has been reported in warmer months of the year on the eastern slopes of the Rocky Mountains in Larimer County, Colorado. A distribution map and key are provided for all species in the genus Phalacropsylla.

9.
J Parasitol ; 103(1): 127-131, 2017 02.
Artigo em Inglês | MEDLINE | ID: mdl-27788020

RESUMO

As a part of an ongoing project to inventory the helminth parasites of rodents in Mexico, 85 specimens of 2 families of rodents were collected from the Mexican Plateau: Cricetidae ( Neotoma sp., Neotoma leucodon , Onychomys arenicola , Peromyscus sp., Peromyscus eremicus , and Reithrodontomys sp.) and Heteromyidae ( Chaetodipus sp., Chaetodipus eremicus , Chaetodipus hispidus , Dipodomys merriami , Dipodomys ordii , Dipodomys ornatus, Dipodomys spectabilis , Liomys irroratus , Perognathus sp., and Perognathus flavus ). A total of 13 taxa of helminths were found: Heteromyoxyuris longejector, Heteromyoxyuris otomii, Heteromyoxyuris sp., Onchocercidae gen. sp. 1 and sp. 2, Physalopteridae gen. sp., Protospirura dipodomis, Pterygodermatites dipodomis, Subulura sp., Syphacia sp., Trichuris dipodomis, Vexillata liomyos, and Vexillata armande. The highest species richness was recorded in D. merriami (7 taxa). This study is the first report of nematodes from O. arenicola (Physalopteridae gen. sp.) and C. eremicus (H. longejector) and for V. liomyos from D. merriami . All reports of these species of nematodes represent new collection localities in Mexico.


Assuntos
Arvicolinae/parasitologia , Nematoides/isolamento & purificação , Infecções por Nematoides/veterinária , Doenças dos Roedores/parasitologia , Animais , Dipodomys/parasitologia , México/epidemiologia , Nematoides/classificação , Nematoides/crescimento & desenvolvimento , Infecções por Nematoides/epidemiologia , Infecções por Nematoides/parasitologia , Prevalência , Doenças dos Roedores/epidemiologia , Roedores
10.
J Parasitol ; 96(2): 285-98, 2010 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-19958045

RESUMO

The genus Strepsylla Traub is redescribed and compared with the other genera of the tribe Phalacropsyllini. Thirteen recognized species are distributed in Mexico, Guatemala, Honduras, Costa Rica, and Panama, where they parasitize small rodents, especially mice of the genus Peromyscus. Five new species are reported and described (Strepsylla ixtlanensis n. sp., Strepsylla longicauda n. sp., Strepsylla queretana n. sp., Strepsylla tezontli n. sp., and Strepsylla vargasi n. sp.). Keys for the genera of the tribe and for the species of Strepsylla are included, and relevant notes for each species are given. A cladistic analysis of Strepsylla led to the recognition of 2 clades: one includes S. mina, S. villai, and S. tezontli, which are distributed along the Trans-Mexico Volcanic Belt; and the other includes the remaining species, which have a northern Mexico distribution.


Assuntos
Ectoparasitoses/veterinária , Peromyscus/parasitologia , Filogenia , Doenças dos Roedores/parasitologia , Sifonápteros/classificação , Animais , Ectoparasitoses/parasitologia , Feminino , Lagomorpha , Masculino , México , Roedores , Sifonápteros/anatomia & histologia , Sifonápteros/genética
11.
J Parasitol ; 95(3): 532-5, 2009 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-20050053

RESUMO

We report the first record of ectoparasites from Nelson's woodrat, Neotoma nelsoni, a rare, endemic mammal of east-central Mexico. We also describe a new flea species of Anomiopsyllus (A. perontesis n. sp.), which presents a complete row of bristles on sternum IX and 3 blunt spines on movable process; provide a new country record for the flea Stenistomera alpina (Baker, 1985); and report a new host record for the flea Echidnophaga gallinacea (Westwood, 1875). A taxonomic key for the new species is included.


Assuntos
Ectoparasitoses/veterinária , Doenças dos Roedores/parasitologia , Sigmodontinae/parasitologia , Sifonápteros/classificação , Animais , Ectoparasitoses/parasitologia , Feminino , Masculino , México , Sifonápteros/anatomia & histologia
12.
Bol. Soc. Peru. Med. Interna ; 7(3): 116-7, jul.-sept. 1994. ilus
Artigo em Espanhol | LILACS | ID: lil-154624

RESUMO

Reportamos el caso de un paciente joven con fiebre tifoidea que en su evolución desarrolló como complicación una vasculitis leucocitoclástica. Dado lo infrecuente de la presentación de vasculitis asociada a Salmonella typhi en nuestro medio , es que presentamos este caso


Assuntos
Humanos , Masculino , Adulto , Febre Tifoide/complicações , Febre Tifoide/patologia , Vasculite/etiologia , Salmonella typhi/patogenicidade
13.
Rev. gastroenterol. Perú ; 14(1): 22-6, ene.-abr. 1994. ilus, tab
Artigo em Espanhol | LILACS | ID: lil-132521

RESUMO

Este estudio retrospectivo evaluó a 25 pacientes con lesiones polipoideas benignas y 2 casos con pólipos malignos de la vesícula biliar, sometidos a colecistectomía simple en el Hospital Belén de Trujillo, desde enero de 1966 a diciembre de 1993 con el propósito de identificar su presentación clínico-patológica. La colelitiasis coexistió en el 68 por ciento y la colesterolosis en el 12 por ciento de las lesiones benignas. El promedio de edad fue de 48.8+/-15 años y la relación M:F fue 1:4, el síntoma más frecuente fue dolor abdominal (100 por ciento) y la colecistorafía oral mostró vesícula excluída en el 44 por ciento de los pacientes con lesiones benignas. Histológicamente las lesiones se clasificaron como:Hiperplasias (n=11), adenomas (n=10), pólipos colestorolósicos (n=2), pólipos inflamatorios (n=2) y pólipos adenocarcinomatosos (n=2). El 76//de las lesiones benignas fueron menores de 0.5 cm. de diámetro y 12 por ciento fueron múltiples. El diámetro de los pólipos adenocarcinomatosos fue mayor de 3 cm. Se concluye que los tumores epiteliales benignos de la vesícula biliar son poco frecuentes (1 por ciento) y el tratamiento de los pólipos adenomatosos debe ser quirúrgico por la posibilidad de presentar transformación maligna.


Assuntos
Humanos , Masculino , Feminino , Adulto , Pessoa de Meia-Idade , Pólipos/patologia , Vesícula Biliar/patologia , Adenocarcinoma/patologia , Adenocarcinoma/cirurgia , Cálculos da Bexiga Urinária/complicações , Estudos Retrospectivos , Vesícula Biliar/cirurgia
14.
Diagnóstico (Perú) ; 35(2): 4-12, mar.-abr. 1996. ilus, tab
Artigo em Espanhol | LILACS | ID: lil-343691

RESUMO

Con el objeto de identificar el cuadro clínico-patológico en pacientes con tumores benignos (n=52) y malignos (n=22) de las glandulas salivales, y determinar la influencia del estadio clínico, tipo histológico y tipo de tratamineto en la sobrevida actuarial a 5 años en los casos portadores de tumores malignos, se revisaron las historias clínicas de 74 pacientes, atendidos en el Hospital Belén de Trujillo, Perú, desde el 1963 a 1993. La edad promedio fue de 48.7 * 17.2 años. a proporción H:M fue de 1:2. Los síntomas más frecuentes fueron tumor y dolor local. La glándula más frecuentemente afectada fue la parótida (64 por ciento), seguida por la submaxilar (20 por ciento), salival menor (15 por ciento) y sublingual (1 por ciento). La sobrevida a 5 años de los 22 pacientes con tumores malignos fue de 28 por ciento. Hubo 6 pacientes en EC I-II y 16 en EC III-IV con una sobrevida a los 5 años de 80 por ciento y 13 por ciento respectivamente (p < 0.05). El tipo histológico más común fue el tumor mixto benigno (88 por ciento) y maligno (27 por ciento). La sobrevida quinquenal en los pacientes con tumor mixto maligno fue de 18 por ciento y la de los tipos histológicos restantes fue de 34 por ciento (p > 0.05). Once pacientes recibieron tratamiento quirúrgico, 7 cirugía más radioterapia y 4 radioterapia sola, con una sobrevida a 5 años de 52 por ciento, 25 por ciento y 0 por ciento respectivamente.


Assuntos
Humanos , Masculino , Feminino , Adenoma Pleomorfo/diagnóstico , Adenoma Pleomorfo/mortalidade , Adenoma Pleomorfo/patologia , Glândulas Salivares/patologia , Neoplasias das Glândulas Salivares
15.
Diagnóstico (Perú) ; 35(3): 14-21, mayo-jun. 1996. ilus, tab, graf
Artigo em Espanhol | LILACS | ID: lil-176353

RESUMO

Con el objeto de identificar el cuadro clínico-Patológico, los fatores pronósticos y la sobrevida actuarial a 5 años se revisaron las historias clínicas de 56 pacientes con carcinoma epidermoide de cavidad oral (n=45) y de orofaringe (n=11), atendidos en el hospital Belén de Trujillo, Perú, entre los años 1967-1993. La edad promedio de la presente serie fue de 61 años y la relación Hombre:Mujer fue de 3.3:1. El labio (42 por ciento) y lengua movil (38 por ciento) fueron las localizaciones más afectadas en cavidad oral, mientras que en orofaringe fue la amígdala palatina (64 por ciento). En general, las molestias más frecuentes fueron dolor local y tumor exofítico, pero las adenopatías y odinofagia se presentaron mayormente en las neoplasias de orofaringe (p<0.01). Enlas neoplasias de cavidad oral predominaron los tumores primarios T1 y T2 (p=0.05), ausencia de metástasis ganglionar regional (p=0.004) y a distancia (p=0.03), estadios clínicos I y II (p=0.001) y tumores G1 y G2 (p=0.03), en comparación con las neoplasias localizadas en la orofaringe. La localización en orofaringe (p<0.001), un tumor primario T3 o T4 (p<0.001), metástasis ganglionar regional (p<0.001) y a distancia (p<0.005), y un estudio clínico III y IV (p<0.001) fueron altamente predictivos de la sobrevida. Según el tipo de tratamiento la sobrevida a 5 años , en los casos de cancer en la cavidad oral fue de 91 por ciento con cirugía sola, 31 por ciento con radioterapia y 33 por ciento con terapia combinada (p<0.01). La sobrevida actuarial a 5 años fue de 59 por ciento para cavidad oral y 9 por ciento para orofaringe (p<0.001). Se concluye que la localización y el estadio clínico son los factores pronósticos más importantes


Assuntos
Humanos , Masculino , Feminino , Adulto , Pessoa de Meia-Idade , Carcinoma de Células Escamosas/diagnóstico , Carcinoma de Células Escamosas/mortalidade , Carcinoma de Células Escamosas/patologia
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