Facultad de Ciencias de la Salud: Recent submissions
Now showing items 941-960 of 1554
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Neutrophils dampen adaptive immunity in Brucellosis
(American Society For Microbiology, 2019-04-23)Brucella organisms are intracellular stealth pathogens of animals and humans. The bacteria overcome the assault of innate immunity at early stages of an infection. Removal of polymorphonuclear neutrophils (PMNs) at the ... -
Neutrophils as Trojan Horse vehicles for Brucella abortus macrophage infection
(Universidad Nacional, Costa Rica, 2019-05-07)Brucella abortus is a stealthy intracellular bacterial pathogen of animals and humans. This bacterium promotes the premature cell death of neutrophils (PMN) and resists the killing action of these leukocytes. B. abortus-infected ... -
A novel host-adapted strain of Salmonella Typhimurium causes renal disease in olive ridley turtles (Lepidochelys olivacea) in the Pacific
(Springer Nature, 2019-06-27)Salmonella spp. are frequently shed by wildlife including turtles, but S. enterica subsp. enterica serovar Typhimurium or lesions associated with Salmonella are rare in turtles. Between 1996 and 2016, we necropsied 127 ... -
Emergence of an outbreak-associated Clostridium difficile variant with increased virulence
(Journal of Clinical Microbiology, 2015-04-23)The prevalence of Clostridium difficile infections has increased due to the emergence of epidemic variants from diverse genetic lineages. Here we describe the emergence of a novel variant during an outbreak in a Costa Rican ... -
Characterization of Anaplasma spp. infection in dogs from Costa Rica
(Universidad Nacional, Costa Rica, 2017-02-09)A cross-sectional study combining serological and molecular techniques for detecting selected Anaplasma species was conducted between 2011 and 2012 in dogs and ticks sampled in all provinces of Costa Rica. Global Anaplasma ... -
The potential use of Rattus norvegicus (Mammalia, Muridae) in experimental infections with metacercariae of Paragonimus mexicanus (Digenea, Troglotematidae)
(Universidad Nacional, Costa Rica, 2017-01-15)Seven Wistar rats (Rattus norvegicus) were experimentally infected with Paragonimus mexicanus metacercariae, obtained from organs and tissues of freshwater crabs (Brachyura: Pseudothelphusidae) collected from the Caribbean ... -
Environmental factors associated with Dictyocaulus viviparus and Fasciola hepatica prevalence in dairy herds from Costa Rica
(Universidad Nacional, Costa Rica, 2017-06-15)Dictyocaulosis and fasciolosis are parasitic diseases that cause considerable economic losses for owners of farm animals worldwide, with special relevance on fasciolosis because it is an emerging zoonosis. Indirect diagnosis ... -
First report on the seroprevalence of Neospora caninum in goats from the Federal State of Hesse, Germany
(Universidad Nacional, Costa Rica, 2017-10-23)A total of 415 goat serum samples from 26 flocks in Hesse, Central Germany, were analyzed for the presence of specific antibodies against the abortion-causing apicomplexan parasite Neospora (N.) caninum by immuno-enzyme ... -
Seroprevalence and factors associated with Toxoplasma gondii-, Neospora caninum- and Coxiella burnetii-infections in dairy goat flocks from Costa Rica
(Elsevier, 2018-09-19)A total of 391 goats from 13 dairy flocks from all Costa Rican regions were analyzed for Toxoplasma gondii-, Neospora caninum- and Coxiella burnetii-related seroprevalence by enzyme-linked immunosorbent assays (ELISA). ... -
Extracellular trap formation in response to Trypanosoma cruzi Infection in granulocytes isolated from dogs and common opossums, natural reservoir hosts
(Frontiers in Microbiology, 2018-05-15)Granulocytes mediate the first line of defense against infectious diseases in humans as well as animals and they are well known as multitasking cells. They can mediate antimicrobial activity by different strategies ... -
Detección de anticuerpos contra Trypanosoma cruzi en caninos de Costa Rica
(Universidad Nacional, Costa Rica, 2018-12-02)La enfermedad de Chagas es una enfermedad vectorial zoonótica ocasionada por Trypanosoma cruzi y transmitida, principalmente, por Triatoma dimidata, en Costa Rica. El parásito puede infectar a humanos, animales domésticos ... -
Brucella abortus induces the premature death of human neutrophils through the action of Its lipopolysaccharide
(PLoS Pathogens, 2015-05-06)Most bacterial infections induce the activation of polymorphonuclear neutrophils (PMNs), enhance their microbicidal function, and promote the survival of these leukocytes for protracted periods of time. Brucella abortus ... -
Is the production of embryos in small-cale farming an economically feasible enterprise?
(Reproduction in Domestic Animals, 2015-04)The present assay attempts to evaluate the feasibility of using embryo transfer in small community farmers by in vivo study and by modelling the results obtained. From the total of 59 donor cows, 62.7% responded to treatment, ... -
Presence of Maedi-Visna in Costa Rican sheep flocks
(Small Ruminant Research, 2015-01-22)A total of 359 sheep serum samples from 15 farms were analyzed for the presence of antibodies against Maedi Visna Virus (MVV) by Enzyme-linked Immunosorbent Assay (ELISA). Additionally, a survey was applied to the sheep ... -
Detection of antibodies against Chlamydophila abortus in Costa Rican sheep flocks
(Open Veterinary Journal, 2015-09-01)A total of 359 sheep samples from 15 flocks were analyzed for the presence of antibodies against Chlamydophila abortus using a commercial Enzyme linked Immunosorbent Assay (ELISA). Antibodies were detected in 19 (5.29%) ... -
Brucella canis is an intracellular pathogen that induces a lower proinflammatory response than smooth zoonotic counterparts
(Infection and Immunity, 2015-09-29)Canine brucellosis caused by Brucella canis is a disease of dogs and a zoonotic risk. B. canis harbors most of the virulence determinants defined for the genus, but its pathogenic strategy remains unclear since it has not ... -
Detection of Babesia caballi and Theileria equi in blood from equines from four indigenous communities in Costa Rica
(Veterinary Medicine International, 2015-11-16)A cross-sectional study was carried out in four indigenous communities of Costa Rica to detect presence and prevalence of Babesia caballi and Theileria equi and to investigate factors associated with presence of these ... -
Detection of Dirofilaria immitis and other arthropod-borne filarioids by an HRM real-time qPCR, blood-concentrating techniques and a serological assay in dogs from Costa Rica
(Parasites and Vectors, 2015-03-23)Background: Canine filarioids are important nematodes transmitted to dogs by arthropods. Diagnosis of canine filariosis is accomplished by the microscopic identification of microfilariae, serology or PCR for filarial-DNA. ... -
Pathogenic potential of a Costa Rican strain of 'Candidatus Rickettsia amblyommii' in guinea pigs (Cavia porcellus) and protective immunity against Rickettsia rickettsii
(Ticks and Tick-borne Diseases, 2015-09)Candidatus Rickettsia amblyommii' is a spotted fever group rickettsia that is not considered pathogenic, although there is serologic evidence of possible infection in animals and humans. The aim of this study was to evaluate ... -
Fatal Paratanaisia bragai (Digenea: Eucotylidae) infection in scarlet macaws (Ara macao) in Costa Rica
(Acta Parasitologica, 2015-06-16)We report on four fatal cases of renal infection due to Paratanaisia bragai in scarlet macaws (Ara macao) from two rescue centres in Costa Rica. At necropsy, birds had severe dehydration and cachexia. Two birds had ...