Roger Ivan Rodriguez Vivas

Roger Ivan Rodriguez Vivas
Universidad Autónoma de Yucatán | UADY · Department of Parasitology

DVM, MSc., PhD. University of Yucatan (DVM) and University of Liverpool (MSc, PhD)

About

330
Publications
373,055
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
4,905
Citations
Introduction
Full-time Professor of Veterinary Parasitology at the FMVZ-UADY in Mexico. He is the head of the Veterinary Parasitology laboratory and has a strong record of research that aims to improve understanding of the diagnosis, epidemiology and control of tick and tick-borne diseases. He has published peer-reviewed scientific papers and is author of 4 books on Veterinary Parasitology. Member of SNI in Mexico (Level III) Mexican Academy of Veterinary, and Mexican Academy of Science.

Publications

Publications (330)
Article
Full-text available
Bioagrociencias Volumen 15, Número 1S 16 Enfermedad de Lyme en México: situación actual, diagnóstico y riesgo en salud pública Introducción a Enfermedad de Lyme (EL) es una infección bacteriana y multisistémica en pequeños y grandes mamíferos, ocasionada por Borrelia burgdorferi sensu lato, y transmitida por garrapatas del género Ixodes. Esta enfer...
Article
Full-text available
Las bacterias espiroquetas Borrelia burgdorferi sensu lato (s.l.) y Leptospira spp. ocasionan la borreliosis de Lyme y leptospirosis, respectivamente, ambas enfermedades zoonóticas de importancia en salud pública. En sus respectivos ciclos epidemiológicos, los pequeños roedores son hospedadores accidentales y reservorios naturales de estas bacteria...
Article
Full-text available
El objetivo del presente trabajo es presentar un análisis de los reportes de infección por SARS-CoV-2 en roedores y sobre sus posibles implicaciones en la transmisión hacia los seres humanos.
Chapter
Las infestaciones por la garrapata del ganado bovino, Rhipicephalus (Boophilus) microplus, representan el mayor problema global por ectoparásitos del ganado en regiones tropicales y subtropicales. Las pérdidas económicas ocasionadas por R. microplus estan relacionanadas con la reducción en la producción de leche, carne, daños en las pieles, costos...
Article
Full-text available
This study evaluates the acaricidal activity of Mexican native plants against a Rhipicephalus microplus population resistant to both amitraz and cypermethrin. To explore the activities of plants, the larvicidal effects of 72 Kupchan fractions (Hex, DCM, AcOEt and MeOH:H2O) of 18 plant species collected in Veracruz, Mexico were studied. The evaluati...
Article
Full-text available
Background: Louse-fly (Lipoptena spp.) and ticks are blood-sucking ectoparasites of domestic and wild animals and accidentally of humans. Globally, there is little information on the medical importance of these ectoparasites, but there are studies that suggest that these ectoparasites might be involved in the transmission of pathogens. In Mexico, b...
Article
Full-text available
El objetivo de este trabajo es describir la importancia del CPM como fuente alternativa de proteína de origen animal para la alimentación humana y conocer las principales zoonosis parasitarias que afectan su sistema de producción. Se reconoce la resistencia innata contra las enfermedades bacterianas y alguna virales. Sin embargo son sensibles a las...
Article
Human tick-borne rickettsioses are caused by Rickettsia africae, Rickettsia massiliae, Rickettsia parkeri, Rickettsia philipi, and Rickettsia rickettsii in the American continent. Rickettsia parkeri represents the second most important agent of eschar-associated spotted fever throughout the American continent. In Mexico, the presence of three strai...
Article
Full-text available
Bioagrociencias Volumen 15, Número 1 1 La garrapata Amblyomma parvum como vector potencial de patógenos en animales y seres humanos
Chapter
Full-text available
En la actualidad, gran parte de los esfuerzos de conservación de fauna silvestre se lleva a cabo en zoológicos. Debido a que el control parasitario es un aspecto importante para el buen manejo sanitario de estos lugares, se determinaron los parásitos intestinales en doce especies de la familia Felidae y siete especies de la familia Canidae en ocho...
Article
Full-text available
Introducción. Los endoparásitos y ectoparásitos en perros son de distribución mundial. La estrecha relación entre los perros y el hombre implica un riesgo de transmisión de parasitosis zoonóticas, por lo cual es necesario conocer las especies que parasitan a los perros de esta zona y determinar los factores asociados. Objetivos. Estimar la prevalen...
Article
Full-text available
Las garrapatas son ácaros, ectoparásitos y hematófagos obligados (consumen sangre) que infestan animales domésticos y silvestres y que se dividen taxonómicamente en tres familias: Ixodidae, Argasidae y Nuttalliellidae. A nivel mundial, la familia Argasidae, que incluye a las garrapatas blandas, se divide en cuatro géneros Argas, Carios, Ornithodoru...
Article
Full-text available
The objective of the present study was to estimate the prevalence of parasites and identify the ones with the zoonotic potential present in the feces of households dogs and stray dogs in Gomez Palacio, Durango, Mexico. Fifty fecal samples from household dogs and 50 fecal samples from stray dogs were collected and analyzed by sucrose flotation and M...
Article
Full-text available
Se describe información actualizada sobre la Dirofilariosis producida por Dirofilaria immitis, su presentación clínica, diagnóstico, terapéutica, prevención y su control en felinos domésticos. La enfermedad suele ser hiperaguda y se estima que la prevalencia por gusanos adultos suele oscilar entre 5 y 20%. La Dirofilariosis felina es una enfermedad...
Article
Background. Macrocyclic lactones (ML) are effective in controlling endo-and ectoparasites in livestock. ML, specially ivermectin and moxidectin, have a typical pharmacokinetic profile of lipophilic molecules with slow degradation and when administered to livestock are excreted in the faeces almost unaltered. ML released into the environment, can ca...
Article
Full-text available
l ácaro del oído, Otodectes cynotis (familia Psoroptidae) (Figura 1) que afecta a varios animales de compañía, principalmente perros y gatos, habita en el canal auditivo externo de éstos animales donde se alimentan de detritus (Rodríguez-Vivas et al. 2015). La afección clínica por O. cynotis es común, puesto que más de la mitad de los casos de otit...
Article
Full-text available
Objetivo. Determinar la circulación del virus del Oeste del Nilo (VON) en caballos del oriente de Yucatán, México. Materiales y métodos. Por conveniencia se estudiaron 184 caballos localizados en 23 unidades de producción de los municipios de Tizimín y Panabá, Yucatán. De cada caballo se obtuvo una muestra de suero sanguíneo, la cual fue evaluada c...
Article
Full-text available
Objective. To determine the circulation of West Nile virus (WNV) in horses from the eastern Yucatán, Mexico. Materials and Methods. For convenience, 184 horses from 23 production units in the municipalities of Tizimín and Panabá, Yucatán, were studied. A blood serum sample was obtained from each studied horse and evaluated with an immunoglobulin M...
Article
Full-text available
Background. Macrocyclic lactones (ML) are effective in controlling endo-and ectoparasites in livestock. ML, specially ivermectin and moxidectin, have a typical pharmacokinetic profile of lipophilic molecules with slow degradation and when administered to livestock are excreted in the faeces almost unaltered. ML released into the environment, can ca...
Article
Full-text available
Background. Macrocyclic lactones (ML) are effective in controlling endo-and ectoparasites in livestock. ML, specially ivermectin and moxidectin, have a typical pharmacokinetic profile of lipophilic molecules with slow degradation and when administered to livestock are excreted in the faeces almost unaltered. ML released into the environment, can ca...
Article
The prevalence, resistance ratios and factor associated with Rhipicephalu microplus populations resistant to amitraz, flumethrin, coumaphos, and ivermectina (IVM) in Mexico were studied. Field tick populations were collected from 54 farms in 15 different states of Mexico. The dose–response bioassays were carried out using the larval immersion test...
Article
Full-text available
Background. Fasciolosis is a zoonotic parasitic disease, which affects different ruminant and non-ruminant hosts from tropical and temperate regions around the world. There are reports that parasites of the genus Fasciola, particularly F. hepatica, show morphological variation according to the species of host animal in which it develops. Objective....
Article
Full-text available
Background. In tropical and subtropical regions of the world, ticks and nematodes negatively affect the health and welfare of animals, the search for natural alternatives for parasite control is necessary to reduce resistance and dependence to antiparasitics. Objective. To present the main findings on the acaricidal and anthelmintic activity of Pet...
Article
Intensive use of macrocyclic lactones for parasite control exerts strong selective pressure for arthropods such as ticks to become resistant to them. Rhipicephalus sanguineus sensu stricto is a tick and disease vector of significant public health and veterinary importance worldwide. We assessed the toxicological response to the macrocyclic lactone...
Article
Full-text available
Objetivo. Evidenciar la circulación de Leptospira spp. en sangre de perros de una comunidad rural del estado de Yucatán, México. Materiales y métodos. Se recolectaron muestras sanguíneas en 120 perros de Maxcanú, Yucatán. Además, se registraron características como sexo, edad, raza y se preguntó a los dueños sobre el historial de vacunas. Las muest...
Article
Full-text available
Objective. To assess the frequency of Leptospira spp. in blood of dogs in a rural community in the state of Yucatan, Mexico. Materials and methods. Blood samples were collected from 120 dogs from Maxcanú, Yucatan. Characteristics such as sex, age, and breed were recorded, and owners were asked about the vaccination history. The samples were transpo...
Article
The present study explored the frequency of hair-sheep farms with gastrointestinal nematodes (GIN) resistant to albendazole sulfoxide (AS), ivermectin (IVM) and levamisole (LEV) in the Yucatán peninsula, México, using the faecal egg count reduction test (FECRT), and compared the frequency of farms diagnosed with resistance using three different for...
Article
Full-text available
The present work provides an updated checklist of helminth species infecting invasive murid rodents (Mus musculus, Rattus norvegicus, R. rattus, and Rattus sp.) in Mexico, including 35 helminth taxa (3 trematodes, 7 cestodes, 2 acanthocephalans, and 23 nematodes). The helmin-thological records were compiled from 18 studies conducted in seven Mexica...
Article
Full-text available
p> Background. In tropical and subtropical regions there are ideal conditions for the maintenance and proliferation of leptospirosis, toxoplasmosis, American trypanosomiasis, and heartworm disease, which affect the welfare and health of domestic and synanthropic animals and can cause zoonoses. Objective. To identify the main epidemiological finding...
Article
Full-text available
ANALYTICAL METHODS FOR DETERMINATION OF MACROCYCLIC LACTONES IN DIFFERENT TYPES OF MATRICES. A REVIEW. The macrocyclic lactones (ML) are drugs widely used to combat endo- and ectoparasites in livestock, pets, crops, etc. Since marketing of ivermectin, the number of available ML increased considerably and, consequently, a wide variety of analytical...
Article
Macrocyclic lactones (ML) are antiparasitic drugs routinely used in tropical cattle farming. After its administration, the drug is eliminated in the ani- mal’s feces, causing a toxic effect on the beneficial fauna that provides ecosystem services, including the recycling of excrement to facilitate the return of nutrients to the grassland soil. Bioa...
Article
Full-text available
Se realizó un estudio transversal con una muestra de 40 perros con signos clínicos sugestivos de infección por Leishmania spp y Trypanosoma cruzi en el municipio de Lázaro Cárdenas, Quintana Roo, México. Se tomaron muestras de sangre, piel y médula ósea. Se realizaron las pruebas de inmunofluorescencia indirecta (IFI) para detección de anticuerpos...
Article
Full-text available
Bovine babesiosis is a reportable transboundary animal disease caused by Babesia bovis and Babesia bigemina in the Americas where these apicomplexan protozoa are transmitted by the invasive cattle fever ticks Rhipicephalus (Boophilus) microplus and Rhipicephalus (Boophilus) annulatus. In countries like Mexico where cattle fever ticks remain endemic...
Article
In South America, Triatoma infestans (Hemiptera: Reduviidae) is the main vector of the parasite Trypanosoma cruzi, etiological agent of Chagas disease. The main strategy for vector control is to spray domestic structures with pyrethroids. Reports of populations of T. infestans with varying degrees of resistance to pyrethroids have made the search f...
Article
Full-text available
The present study aimed to evaluate the anthelmintic activity of leaf and bark extracts of Diospyros anisandra collected during different seasons and their major constituents on eggs of Ancylostoma caninum, Haemonchus placei, and cyathostomins. Specifically, the eclosion inhibition of the methanolic extracts of the leaves and bark of D. anisandra c...
Article
Full-text available
Hymenolepis diminuta is a zoonotic cestode parasitizing the small intestine of rodents (definitive hosts). Humans can accidentally enter into the life cycle of this tapeworm via the ingestion of infected insects (intermediate hosts) containing cestode cysticercoids in their body cavity. More than two centuries after the first record in humans, ther...
Article
Full-text available
Morphometric characteristics of blood cells were examined in 44 (16 males, 28 females) Bolson tortoises (Gopherus flavomarginatus) in Mapimí, Mexico. Blood samples were drawn from the subcarapacial vein, and smear stains were used to differentiate and measure the diameter and surface area of cells. Mature and polychromatophilic erythrocytes were id...
Article
The aim of the study was to describe the epidemiological factors associated with the risks of recent Rickettsia exposure in inhabitants of a rural population from Yucatán, Mexico. The study included 130vinhabitants from Maxcanú, Yucatán. Blood samples were collected to detect IgM and IgG antibodies against Rickettsia typhi and R. rickettsii by an i...
Article
Canine babesiosis is a tick-borne disease with worldwide distribution and global significance. Traditionally, canine babesiosis was caused by B. canis (large Babesia) and B. gibsoni (small Babesia) based on cytological examination of stained blood smears. Currently, molecular techniques have demonstrated that several Babesia species infect dogs: B....
Article
Full-text available
Haemaphysalis longicornis (Acari: Ixodidae), the Asian longhorned tick, is native to East Asia, but has become established in Australia and New Zealand, and more recently in the United States. In North America, there are other native Haemaphysalis species that share similar morphological characteristics and can be difficult to identify if the speci...
Article
The attraction of the Digitonthophagus gazella dung beetle to the excreta of cattle treated with ivermectin (IVM) at 1% under controlled and field conditions (Phase 1) as well as the lethal (mortality) and sublethal effects (fecundity, emergence, and dung removal) of the excreta of bovines treated with IVM‐1% and IVM‐3.15% were evaluated (Phase 2)....
Article
Full-text available
Las isoxazolinas son una familia de sustancias químicas que desde 2013 se han usado como antiparasitarios para el control de pulgas y garrapatas en perros y también como antiparasitarios contra otros artrópodos que afectan a la ganadería y a la agricultura. Entre estas sustancias se han reportado compuestos con actividad antimicrobiana y antineoplá...
Article
Full-text available
La garrapata de cuernos largos, Haemaphysalis longicornis Neumann (Acari: Ixodidae), conocida también como garrapata asiática de cuernos largos o garrapata de Asia, es un ectoparásito de la familia Ixodidae (garrapatas duras) nativa de Asia y el oriente de Rusia. Fue detectada en Estados Unidos de América (EUA) desde 2017 como parásita de aves, ani...
Article
Full-text available
We present findings of our preliminary study to determine biometry and blood chemistry values of healthy wild individuals of the critically endangered Bolson tortoises (Gopherus flavomarginatus) in Mexico. Given the absence of previously published data regarding hematology parameters for this species, these results represent an important base for a...
Article
Full-text available
Se reporta la presencia de Dermatobia hominis en bovinos criados en ranchos ubicados en una zona selvática y montañosa de México. Se realizó un estudio en cuatro ranchos, incluidos por conveniencia. Se incluyeron un total de 75 bovinos, se registró la presencia, el número y características de los nódulos cutáneos por animal, y se colectaron larvas....
Article
Full-text available
The tick Rhipicephalus microplus is known to develop resistance against some commercial acaracides, driving a search for natural alternatives. An evaluation was done of the acaricide activity against adult and larval R. microplus of ethanol extracts from three Leucaena spp. genotypes: L. leucocephala (Lam.) de Wit (Native); L. leucocephala (Cunning...
Article
Rickettsial infections in dogs of Mexico were investigated. A total of 246 dogs were blood sampled and initially screened to detect Ehrlichia canis, E. chaffeensis, E. ewingii, Anaplasma phagocytophilum and Rickettsia rickettsii by a quantitative real-time PCR (qPCR) assay. Sixty-five dogs were monitored and sampled twice 7-8 months apart. Using th...
Article
Full-text available
Cysticercus fasciolaris is the larval stage of Taenia taeniaeformis, a parasite that predominantly affects felines. It, however, has zoonotic significance since humans can be accidental hosts. Rodents and lagomorphs act as Intermediate hosts in this parasite’s life cycle. The aim of this study was to determine the natural occurrence of infection by...
Article
Full-text available
Objective. To describe the case report of a parasitized doq with Spirocera lupi in Yucatan, Mexico, as well as report cases reqistered in two laboratories durinq 18 years of parasitoloqical and necropsy studies (2000-2017). Materials and methods. A case study is reported, with necropsy, histológica! and parasitological findings. Likewise, a retros...
Article
Full-text available
Toxoplasma gondii is an obligate intracellular protozoan parasite, recognized as the etiologic agent of toxoplasmosis, a zoonotic endemic disease in several countries, including Mexico. In the Yucatan State of Mexico, Toxoplasma infection has a high impact in both human and domestic animal health. Wild animals can also host zoonotic pathogens such...
Article
Macrocyclic lactones can have adverse effects in dung beetles exposed to manure containing them. An assessment of the survival and fertility of adult Onthophagus landolti Harold fed with manure from cows treated with moxidectin was performed, as well as the emergence rate of the imagoes from the masses. Three cows (Bos indicus x B. taurus) were sub...
Article
Ivermectin (IVM) is widely used for parasite control in livestock in the tropics. Residual IVM in feces conserves its insecticide activity for weeks and can harm dung beetle (DB) species. Attraction to the feces of IVM-treated cattle was tested using the DB species Onthophagus landolti (Harold) and Canthon indigaceus chevrolati (Harold) as models....
Article
Twenty-five white-tailed deer (Odocoileus virginianus yucatanensis) (WTD), 4 mazama deer (Mazama temama) (MD), and the ticks they host in Yucatan, Mexico were sampled to run a molecular survey for tick-borne rickettsial agents. The prevalence of rickettsial agents was 20% in WTD (5/25) and 50% in MD (2/4). When sequencing the nested PCR products, E...
Article
Full-text available
The avermectins, milbemycins and spinosyns are part of macrocyclic lactones (ML) group, endectocides that are obtained by fermentation of different species of soil microorganisms. MLs are widely used in veterinary medicine and agriculture because of their potent activity against nematodes and arthropods. However, these compounds, when disposed in t...
Article
Full-text available
The protozoan parasite Trypanosoma cruzi is the causative agent of the Chagas disease, which is endemic in southeastern Mexico and is transmitted by the vector Triatoma dimidiata (triatomide). T. cruzi infect a great variety of domestic and wild mammals; rodents are considered one of the most important reservoirs of the parasite in the transmission...
Article
Full-text available
Trypanosoma cruzi the causative agent of Chagas disease, can be found in more than 150 different species of domestic and wild mammals in the American continent. Domestic mammals like dogs, and commensal rodents, have been frequently implicated as hosts and/or reservoirs in the domestic and peridomestic cycle of transmission, however, little attenti...
Article
Full-text available
Introducción. La leptospirosis es una enfermedad zoonótica endémica en México reconocida como un problema de salud pública y veterinaria, ocasionada por bacterias del género Leptospira. Los roedores son los reservorios más relevantes de Leptospira spp., debido a que la bacteria se establece y reproduce en su tejido renal y es excretada a través de...
Article
Rickettsial infection in dog–associated ticks in three rural communities of Yucatan, Mexico was investigated using qPCR and nested PCR assays. A total of 319 dogs were studied and ticks samples were collected. 170 dogs were infested with ticks (frequency of 53.4%). Overall, 1,380 ticks representing seven species were collected: Amblyomma mixtum, A....
Article
La demodicosis canina es una enfermedad dermatológica común en perros; se presenta por un aumento en la proliferación de los ácaros del género Demodex spp., pero, a pesar de su alta prevalencia, su aparición y desarrollo son aún desconocidos, sin embargo, se asocian, principalmente, a una inmunodisfunción. El sistema inmune juega un papel important...