Browsing Artículos Científicos by Title
Now showing items 316-335 of 566
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In vivo animal models confrm an increased virulence potential and pathogenicity of the NAP1/RT027/ST01 genotype within the Clostridium difcile MLST Clade 2
(BioMed Central, 2020-09-22)Background: Based on MLST analyses the global population of C. difcile is distributed in eight clades, of which Clade 2 includes the “hypervirulent” NAP1/RT027/ST01 strain along with various unexplored sequence types ... -
In vivo proteolytic degradation of the Escherichia coli acyltransferase HlyC
(The American Society for Biochemistry and Molecular Biology, 2001-05-18)Escherichia coli hemolysin (HlyA) is the prototype toxin of a major family of exoproteins produced by Gram-negative bacteria known as “repeats in toxins.” Only fatty acid-acylated HlyA molecules at residues Lys564 and ... -
In-vitropredatory activity of nematophagous fungi from Costa Rica with potential use for controlling sheep and goat parasitic nematodes
(Universidad de Costa Rica., 2011-03)In tropical and subtropical regions of the world, parasitic diseases are a main cause of losses in live-stock productivity. The increased acquired resistence to anthelmintics by gastrointestinal nematodes, requires biological ... -
Increased adult Aedes aegypti and Culex quinquefasciatus (Diptera: Culicidae) abundance in a dengue transmission hotspot, compared to a coldspot, within Kaohsiung City, Taiwan
(MDPI, 2018-08-13)The assumption that vector abundance differences might drive spatial and temporal heterogeneities in vector-borne disease transmission is common, though data supporting it is scarce. Here, we present data from two common ... -
Indian Ocean Dipole and Rainfall Drive a Moran Effect in East Africa Malaria Transmission
(Oxford University Press, 2012-06-15)Background. Patterns of concerted fluctuation in populations—synchrony—can reveal impacts of climatic variability on disease dynamics. We examined whether malaria transmission has been synchronous in an area with a common ... -
Indian Ocean Dipole drives malaria resurgence in East African highlands
(SCIENTIFIC REPORTS, 2012-02-16)Malaria resurgence in African highlands in the 1990s has raised questions about the underlying drivers of the increase in disease incidence including the role of El-Nin ̃o-Southern Oscillation (ENSO). However, climatic ... -
Indices de similitud entre taxocenosis de t1ebótomos (Diptera: Psychodidae) en un área endémica de leishmaniasis cutánea en Costa Rica
(Universidad de Costa Rica, 1993-12-01)A comparison of diversity between eight Costa Rican taxocenosis of phlebotorninae sandflies was made with the Sorensen sirnilarity coefficient. Sites Agua Blanca-Chirraca (C = 0.68), Ceiba Este-Chirraca (C = 0.66), La ... -
Infectious agents associated with diarrhoea of calves in the canton of Tilarán, Costa Rica
(Elsevier Science B.V, 1997-01)A case-control study of calves under 3 months of age was carried out by weekly visits to 15 farms in the canton of Tilarán, Costa Rica. Most farms were dedicated to beef or dual-purpose (DP) production. Faecal samples were ... -
Intervalo parto-concepción en ganado lechero especializado de Costa Rica
(Universidad Nacional, Costa Rica, 2019-03-25)Resumen: Un hato lechero eficiente debe producir una cría viva y sana por vaca, por año, y esto se debe de conseguir con un Intervalo Parto Concepción (IPC) no superior a 100 días. Objetivo: describir aspectos epidemiológicos ... -
Intoxicación por Senna cobanensis en terneros cebuinos: Primer reporte de caso
(Universidad Nacional, Costa Rica, 2023)Las plantas del género Senna pertenecen a la familia Fabaceae, distribuidas, mundialmente, en zonas tropicales y subtropicales. Algunas especies del género contienen productos del metabolismo secundario, los cuales se ... -
Intracellular adaptation of Brucella abortus
(Universidad Nacional, Costa Rica, 2009-03)Macrophages were infected with virulent B. abortus strain 2308 or attenuated strain 19. Intracellular bacteria were recovered at different times after infection and their proteomes compared. The virulent strain initially ... -
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, ... -
Isolation and genetic characterization of Toxoplasma gondii from striped dolphin (Stenella coeruleoalba) from Costa Rica
(American Society of Parasitologists, 2007)Toxoplasma gondii infection in marine mammals is of interest because of mortality and mode of transmission. It has been suggested that marine mammals become infected with T. gondii oocysts washed from land to the sea. We ... -
Isolation and identification of Arcobacter species from Costa Rican poultry production and retail sources
(Journal of food protection, 2017-04-03)Arcobacter is a gram-negative rod recognized as a potential food- and waterborne pathogen; nevertheless, little is known about the effects of this pathogen on human and animal health. Although Arcobacter species are commonly ... -
Isolation of toxoplasma gondii from the keel-billed toucan (Ramphastos sulfuratus) from Costa Rica
(American Society of Parasitologists, 2009-04-01)Pectoral muscles from a captive keel-billed toucan (Ramphastos sulfuratus) from Costa Rica were fed to a Toxoplasma gondii– free cat, and the cat shed oocysts. Laboratory mice fed these oocysts developed antibodies to T. ... -
Isolation, detection and characterization of swine hepatitis E virus from herds in Costa Rica
(Taylor & Francis, 2008-06)Although swine HEV isolates from North America, Europe, and Asia have been genetically characterized, little is known about the strains presumed to be circulating in Latin America. In this study, seven commercial swine ... -
Isolation, detection and characterization of swine hepatitis E virus from herds in Costa Rica
(Taylor & Francis, 2008)Although swine HEV isolates from North America, Europe, and Asia have been genetically characterized, little is known about the strains presumed to be circulating in Latin America. In this study, seven commercial swine ... -
Isolierung von Coronaviren in der Zellkultur aus Nasentupferproben atemwegskranker Kalber in der Bundesrepublik Deutschland
(Paul Parey Scientific Publishers, 1989)Isolation in tissue culture of coronavirus from respiratory diseased calves in the FRG Coronavirus was isolated in HRT-IS tissue culture from nasal swabs of 4 from 15 calves showing respiratory symptoms. The strains ... -
Índices bibliométricos y revistas de ‘corriente central’: implicaciones para el desarrollo de las ciencias naturales en Costa Rica
(Universidad de Costa Rica, 2015-05)Una característica asociada con el surgimiento de la ciencia moderna, en los siglos XVI y XVII, fue el establecimiento de una rica dinámica ‘socializadora’ del conocimiento mediante reuniones periódicas entre científicos, ... -
Leishmania spp. infection rate and feeding patterns of sand flies (Diptera: Psychodidae) from a hyperendemic cutaneous leishmaniasis community in Panamá
(American Society of Tropical Medicine and Hygiene, 2019)Abstract. American cutaneous leishmaniasis (ACL) is a common and important vector-borne parasitic zoonosis in Panam ´a. Here, we study Leishmania spp. infection rates and blood-feeding patterns among common sand flies in ...