Now showing items 21-40 of 46

    • Enteritis y colitis infecciosa del hombre 

      Mata Jiménez, Leonardo; Simhon Edgar, Alberto (Adel Microbiol Enf Infecc 1(1), 1982)
      Most diarrheas affecting man in developing nations have an: infectious origin, and are transmitted from person to person or indirectly thorough water, food and utensils contaminated with the agents. About two thirds of ...
    • Epidemiology of human rotavirus types 1 and 2 as studied by enzyme-linked immunosorbent assay 

      Yolken, Robert H.; Wyatt, Richard G.; Hisses, George; Brandt, Carld; Rodríguez, William J.; Wha Kim, Hyun; Parrot, Robert H.; Urrutia, Juan José; Mata Jiménez, Leonardo; Greenberg, Harry B.; Kapikian, Albert Z.; Chanock, Robert M. (The New England Journal of Medicine 299:1156-1161, 1978-11-23)
      To determine the relative importance of two known serotypes of human rotavirus, we developed an enzyme-linked immunosorbent assay to differentiate serotype-specific rotavirus antigen and antibody. Using this technic, we ...
    • Epidemiology of rotaviruses in a cohort of 45 Guatemalan Mayan Indian children observed from birth to the age of three years 

      Mata Jiménez, Leonardo; Simhon Edgar, Alberto; Urrutia, Juan José; Kronmal, Richard A.; Fernández, Raúl; García, Bertha (The Journal of Infectious Diseases 148(3) 452-461, 1983-09)
      Chort of 45 children was observed from birth to three years of age in their natural ecosystem to determine patterns of infection, morbidity, and growth. Data from enzyme-linked immunosorbent assay analysis for rotavirus ...
    • Epstein-Barr Virus (EBV) Genome and Expression in Breast Cancer Tissue: Effect of EBV Infection of Breast Cancer Cells on Resistance (Taxol) 

      Arbach, Hratch; Viglasky, Viktor; Lefeu, Florence; Guinebretière, Jean-Marc; Ramírez Mayorga, Vanessa; Bride, Nadège; Boualaga, Nadia; Bauchet, Thomas; Peyrat, Jean-Philippe; Mathieu, Marie-Christine; Mourah, Samia; Podgorniak, Marie-Pierre; Seignerin, Jean-Marie; Takada, Kenzo; Joab, Irène (Journal of Virologia 80(2) p 845-853., 2006-01)
      The Epstein-Barr virus (EBV) has been detected in subsets of breast cancers. In order to elaborate on these observations, we quantified by real-time PCR (Q-PCR) the EBV genome in biopsy specimens of breast cancer tissue ...
    • Escherichia Coli enterotoxigénica en niños hospitalziados en Costa Rica 

      Mata Jiménez, Leonardo; Reyes Lizano, Liliana; Ramírez, Jorge A.; Evans, Doyle J. (Revista Médica Hospital Nacional de Niños Dr. Carlos Sáenz Herrera 13(1):23-32, 1978)
      Se estudió la prevalencia de Escherichia coli enterotoxigénica (ECET) productora de toxina labil y/ o estable en niños con y sin diarrea aguda, internados en el Hospital Nacional de Niños entre enero y diciembre de 1976. ...
    • Estudio citogenético de un caso de leucemia crónica linfocítica de células T 

      Solís Alvarado, Virginia (Acta Médica Costarricense 27 p 170-175, 1984)
      A cytogenetie study is presented using a culture medium with phytohaemagglutinin it was carried out on a 55 years old man undergoing beatment for chronic lymphocytic leukaemia. The following abnormalities were detected: a ...
    • Etiología viral de las diarreas 

      Mata Jiménez, Leonardo; Mohs Villalta, Edgar; Hernández Chavarría, Francisco (Enfermedades diarreicas en el niño 7 ed Ediciones Médicas del Hospital Infantil de México p 111-119, 1981)
      Durante muchos años, los investigadores se han esforzado en buscar la explicación etimológica de las diarreas denominadas "no-bacterianas" o "no-especificas", las cuales se presentan ya en forma aislada y esporadica, o ...
    • Genetic variation of the Y chromosome in Chibcha-Speaking amerindians of Costa Rica and Panama 

      Ruiz Narváez, Edward A.; Santos, Fabricio R.; Carvalho Silva, Denise R.; Azofeifa Navas, Jorge; Barrantes Mesén, Ramiro; Peña, Sergio D. J. (Human Biology 77(1): 71-91, 2005)
      Genetic variation of the Y chromosome in five Chibchan tribes (Bribri, Cabecar, Guaymi, Huetar, and Teribe) of Costa Rica and Panama was analyzed using six microsatellite loci (DYS 19, DYS389A, DYS389B, DYS390, DYS391, and ...
    • Incidencia de diabetes tipo 2 en un área urbano marginal de Costa Rica 

      Laclé Murray, Adriana; Valero F., Juan Luis (Acta Médica Costarricense 50(1) p 29-34, 2008-01)
      Justification and Objective: Diabetes is now a global epidemic. Once thought to be a disease primarily affecting developed nations, diabetes is growing rapidly and exponentially in developing nations, seriously impacting ...
    • Infectious agents in acute and chronic diarrhea of chilhood 

      Mata Jiménez, Leonardo; Urrutia, Juan José; Simhon Edgar, Alberto (Chronic diarrea a in children: Raven Press p. 237 - 252, 1984)
      Even today acute diarrheal disease is thought of by many laymen as well as by some medical professionals in developing countries as being a syndrome of alimentary origin. Despite recognition of shigellosis, cholera, ...
    • Interacciones celulares en el proceso de invasión de Shigella sp 

      Achí Araya, María Rosario; Barrantes Jiménez, Kenia (Rev Panam Infectol 2009;11(2):56-61, 2009)
      Shigella, como agente etiológico de la disentería bacilar, es un problema importante de salud pública a nivel mundial. Para el establecimiento de la infección este microorganismo emplea las funciones celulares y de ...
    • Low-cost internal controls for detection of Giardia cysts in water samples 

      Solano Barquero, Melissa; Morales Mora, Eric; Chacón Jiménez, Luz María; Cordero Jara, Erick Arnulfo; Reyes Lizano, Liliana; Barrantes Jiménez, Kenia; Achí Araya, María Rosario (2019-08)
      Giardia cysts stained with hot carbolfuchsin were used as internal controls in a concentration method for surface water samples. The morphological integrity of stained cysts and the stain's stability and intensity were ...
    • Microflora of maize prepared as tortillas 

      Capparelli, Edward; Mata Jiménez, Leonardo (1975-06)
      Very little is known of the microflora in tortillas, the major component in the diet of many Guatemalans and other Central Americans. Based in a Guatemalan highland Indian village, this study examined the types and amounts ...
    • Phosphatidylinositol 3-Kinase/Akt Pathway Targets Acetylation of Smad3 through Smad3/CREB-binding Protein Interaction: Contribution to transforming growth factor 1-induced epstein-barr virus reactivation 

      Oussaief, Lassad; Hippocrate, Aurélie; Ramírez Mayorga, Vanessa; Rampanou, Aurore; Zhang, Wei; Meyers, David; Cole, Philip; Khelifa, Ridha; Joab, Irène (THE JOURNAL OF BIOLOGICAL CHEMISTRY 284(36), pp. 23912–23924, 2009-09-04)
      Epstein-Barr virus, a ubiquitous human herpesvirus, is associated with the development of carcinomas and lymphomas. We previously showed that transforming growth factor 1 (TGF- 1) mediated the virus to enter the lytic ...
    • Plasmidos de virulencia 

      Peñaranda, María Elena; Mata Jiménez, Leonardo (Revista Médica del Hospital Nacional de Niños Dr. Carlos Sáenz Herrera 130(I): 11-22, 1978)
      Se revisan conceptos bisicos sobre los plasmidosdesoxirribonucleico extracromosomico con mplicacion autonoma— prisentee en el citoplasma bacte. riano. Se hace infasis en plismidos qua codifican factor's de virulencia como ...
    • Relation of atrophic gastritis with Helicobacter pylori-CagA+ and interleukin-1 polymorphisms 

      Sierra Ramos, Rafaela; Une, Clas Allan; Ramírez Mayorga, Vanessa; Alpízar Alpízar, Warner; González, María I.; Ramírez, José A.; de Mascarel, Antoine; Cuenca Berger, Patricia; Pérez Pérez, Guillermo Ignacio; Mégraud, Francis (World Journal Gastroenterol 14(42), 2008-11-14)
      AIM: To determine the association of Helicobacter pylori (H pylori) CagA+ infection and pro-inflammatory polymorphisms of the genes interleukin (IL)-1RN and IL-1B with the risk of gastric atrophy and peptic ulcers in a ...
    • Rotavirus en un servicio de neonatología: descripción de una epidemia 

      Odio, Carla; Padilla, Roberto; Mohs Villalta, Edgar; Ruíz, María de los Ángeles; Hernández Chavarría, Francisco (Revista Médica del Hospital Nacional de Niños Dr. Carlos Sáenz Herrera: (2): 159-172, 1980)
      Durante una epidemia por rotavirus comprobada en la comunidad, se estudió la situación de los recién nacidos en un Servicio de Neonatología, demostrándose la ocurrencia de tres brotes consecutivos en un período de 10 ...
    • Rotavirus y campylobacter fetus jejuni asociados a un brote de diarrea en terneros 

      Simhon Edgar, Alberto; Gamboa Coronado, María del Mar; Mata Jiménez, Leonardo (Revista de Biología Tropical 32 (2) 303-304, 1984-04-27)
      Rotaviruses and Campylobacter fetus jejuni are ubiquitous agents of diarrheal disease in animals and humans. Under natural conditions they do not seem to cross inter-species barriers; a zoonosis has not been documented for ...
    • S-IgA cholera toxin and rotavirus antibody in human colostrum 

      Simhon Edgar, Alberto; Yolken, Robert H.; Mata Jiménez, Leonardo (Acta Paediar Scand 68(3): 161-164. 1979, 1979)
      S-IgA cholera toxin and rotavirus antibody inhuman colostrum. Acta Paediatr Scand, 68: 161, 1979.—S-1gA antibodies against cholera toxin and rotavirus were assayed in 43 colostral samples by means of an enzyme-linked ...
    • Shigellosis in Central America 

      Mata Jiménez, Leonardo (Shigellosis: a continuing global problem:ICDDR,Bangladesh p 26-38, 1983)
      Shigella infections are very common in Central America, except in Costa Rica and Panama where prevalence rates are low. Shigellosis is the most serious among all the specific diarrhoeas, due to its invasive character, systemic ...