Browsing Escuela de Medicina Veterinaria by Issue Date
Now showing items 21-40 of 1059
-
Chagas' disease: Risk factors for house infestation by Triatoma dimidiata, the major vector of Trypanosoma cruzi in Costa Rica
(The Johns Hopkins University School of Hygiene and Public Health., 1991)The reduction of domiciliary infestation by insect vectors, the key to controlling Chagas' disease, depends on identification of housing features associated with infestation. In this study, log-linear modeling was used to ... -
Peridomiciliary latrines and Phlebotominae sandfties (Diptera: Psychodidae) in a focus of Leishmaniasis in Costa Rica.
(Universidad de Costa Rica, 1991)Las letrinas peridomiciliarias son sitios de reposo de flebótomos en Nazareth ( Guanacaste, Costa Rica). Un total de 622 individuos fueron colectados y clasificados en cuatro especies, Lutzomyia cayennensis (58 .. 68 %), ... -
An electrophoretic study on phospholipase A2 isoenzymes in the venoms of Central American crotaline snakes
(Elsevier, 1992)The number and isoelectric points of phospholipase A2 isoenzymes were studied in the venoms of 12 Central American crotaline snakes of the genera Bothrops, Crotalus, Lachesis and Agkistrodon. The study was carried out by ... -
First report of Lutzomyia (Psychodopygus) bispinosa Fairchild and Hertig (Diptera. Psychodidae) from Costa Rica.
(Universidad de Costa Rica, 1992)Lutzomyia bispinosa had been reported from Belize (Williams 1970), Guatemala (Portes et al. 1987). Honduras (Fairchild and Hertig 1959), Nicaragua (Fairchild an Hertig 1959) and Panamá (Fairchild and Hertig 1951) which ... -
Prevalence and risk factors for Trichomonas foetus infection in cattle in northeastern Costa Rica
(Elsevier, 1992-05-27)Two studies (one pilot and one cross-sectional) were conducted in the two main livestock-rearing areas of Costa Rica using an improved method (In-Pouch TF) for the detection of Trichomonas foetus infection in bulls. Herd ... -
Effect of management and host factors on seroprevalence of bovine anaplasmosis and babesiosis in Costa Rica
(Elsevier B.V, 1993-11-16)The relationships between the seroprevalences of Anaplasma rnarginale, Babesia bige mina, Babesia bovis and some selected factors were assessed. Factors studied were age, breed, herd size, farm size, rotational grazing ... -
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 ... -
Epidemiology of bovine anaplasmosis and babesiosis in Costa Rica
(Elsevier, 1994)A serum bank created by the National Brucellosis Control Program during 1991 con sisted of approximately 4000 sera collected from farms in each of the seven provinces in Costa Rica. Sera were used to determine the ... -
Monitoring female reproductive function by measurement of fecal estrogen and progesterone metabolites in the white-faced saki (Pithecia pithecia)
(Wiley-Liss, 1994)A simple method for extracting and measuring ovarian steroids in feces is applied to the ovarian cycle, pregnancy, parturition, and period of lacta tional amenorrhea in Pithecia pithecia. Small amounts of wet, unmixed ... -
Determinación de la presencia del virus de la mixomatosis en conejos domésticos de Costa Rica
(Universidad Nacional, Costa Rica, 1994)Se hizo un estudio retrospectivo en los archivos del Laboratorio de Patología de la Escuela de Medicina Veterinaria de la Universidad Nacional abarcando el período de 1976 a 1992, en el cual demostró evidencia histopatológica ... -
Bovine Leukaemia‐virus infection in Costa Rica
(Blackwell Wissenschaft, 1995)The geographical distribution of bovine leukaemia‐virus (BLV)‐infected herds in Costa Rica and the isolation of BLV from cases of enzootic bovine leukosis are presented. It was found that BLV is prevalent throughout the ... -
Characterization of Brucella abortus and Brucella melitensis native haptens as outer membrane O-type polysaccharides independent from the smooth lipopolysaccharide
(American Society for Microbiology, 1996)Brucella native haptens (NHs) extracted with hot water from smooth (S)- type B. abortus and B. melitensis were purified to high levels of serological activity and compared with the polysaccharide obtained by acid hydrolysis ... -
Effect of adjuvants on the antibody response of mice to Bothrops asper (Terciopelo) snake venom
(Brazilian Journal of Medical and Biological Research, 1996)The adjuvant properties of several immunostimulant molecules on the murine antibody response to Bothrops asper snake venom were evaluated. Mice receiving venom together with either sodium alginate, calcium alginate, aluminum ... -
Serological survey of small mammals in a vesicular stomatitis virus enzootic area
(Wildlife Disease Association, 1996-04-01)Small nmamnnmals were captured in a Costa Rican dairy farm located ium a vesicular stouiiatitis virus (VSV) enzootic focus, in order to determine which species were naturally infected by this virus. Monthly captures were ... -
Brucella-Salmonella lipopolysaccharide chimeras are less permeable to hydrophobic probes and more sensitive to cationic peptides and EDTA than are their native Brucella sp. counterparts
(American Society for Microbiology, 1996-08-12)A rough (R) Brucella abortus 45/20 mutant was more sensitive to the bactericidal activity of polymyxin B and lactoferricin B than was its smooth (S) counterpart but considerably more resistant than Salmonella montevideo. ... -
Morfologia externa de Triatoma ryckmani Zeledón & Ponce, 1972 vista através da microscopia eletrônica de Varredura
(Memórias do Instituto Oswaldo Cruz, 1996-12)External Morphology of Triatoma rickmani Zeledón & Ponce, 1972 by Scanning Electron Mi croscopy - A male of Triatoma ryckmani Zeledón & Ponce, 1972, was studied by scanning electron microscopy. Only few specimens of this ... -
In search of a bacterial spedes definition
(Universidad de Costa Rica., 1997)The bacterial species concept was examined within the framework of plant and animal associated a-2 proteobacteria, taking into consideration the phylogenetic, taxonomic and biological approaches as well as the microbiologists' ... -
Rotavirus and coronavirus outbreak: etiology of annual diarrhea in Costa Rican children
(Universidad de Costa Rica, 1997)In Costa Rica, an annual outbreak of infant diarrheal disease (December and January) was reported since 1976, and rotavirus was incriminated 1ater as the main etiological agent (1976-1981). Apparently the disease has not ... -
Bactericidal activity of Lys49 and Asp49 myotoxic phospholipases A2 from Bothrops asper snake venom Synthetic Lys49 myotoxin II-(115−129)-peptide identifies its bactericidal region
(FEBS, 1998)Mammalian group-II phospholipases A2 (PLA2) of inflammatory fluids display bactericidal properties, which are dependent on their enzymatic activity. This study shows that myotoxins II (Lys49) and III (Asp49), two group-II ... -
Analysis of test day yield data of Costa Rican dairy cattle
(Elsevier, 1998)Estimates of variance components for test day records in an animal model that considered multiple traits over multiple lactations were calculated using REML methodology. Test day records were classified into 11 periods ...