Listar Articulos, Pre-prints (Facultad de Ciencias) por autor "Ramirez, José Luis"
Mostrando ítems 1-10 de 10
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Acute chagas’ disease in western Venezuela: A clinical, seroparasitologic, and epidemiologic study
Carrasco Guerra, Hugo A.; Parada F., Henry; Crisante R., Gladys E.; Rojas E., Agustina del V.; González V., Nestor E.; Ramirez, José Luis; Guevara, Palmira; Rivero, Christian; Borges P., Rafael E.; Scorza, José Vicente; Añez Reverol, Nestor Oswaldo (The American Society of Tropical Medicine and Hygiene, 1999-02)A clinical, parasitologic, and serologic study carried out between 1988 and 1996 on 59 acute-phase patients in areas of western Venezuela where Chagas’ disease is endemic showed 19 symptomatic patterns or groups of symptoms ... -
Comparative phylogeography of Trypanosoma rangeli and Rhodnius (Hemiptera: Reduviidae) supports a long coexistence of parasite lineages and their sympatric vectors
Da Silva, Flávia Maia; Junqueira, A. C.; Campaner, A.; Rodrigues, A. C.; Crisante R., Gladys E.; Teixeira, Marta M.G.; Ramirez, José Luis; Caballero, C. E.; Monteiro, F. A.; Coura, J. R.; Añez Reverol, Nestor Oswaldo (Molecular Ecology (2007) 16, 2007)To make reliable interpretations about evolutionary relationships between Trypanosoma rangeli lineages and their insect vectors (triatomine bugs of the genus Rhodnius ) and, thus, about the determinant factors of lineage ... -
Detection and significance of inapparent infection in chagas disease in western Venezuela
Añez Reverol, Nestor Oswaldo; Rojas E., Agustina del V.; Crisante R., Gladys E.; Carrasco Guerra, Hugo A.; Parada F., Henry; Yépez, José Yancarlos; Borges P., Rafael E.; Guevara, Palmira; Ramirez, José Luis (Am. J. Trop. Med. Hyg., 65(3), 2001, 2001)Inapparent infections of Trypanosoma cruzi were detected in symptomless seropositive people living in close proximity, and under the same conditions of risk, to patients with acute Chagas disease. Similar infections were ... -
Detection of Leishmania causing visceral Leishmaniasis in the old and new worlds by a polymerase chain reaction assay based on telomeric sequences
Chiurillo, Miguel Angel; Sachdeva, Monica; Dole, Vananda S.; Yépez, José Yancarlos; Miliani, Efraim; Vázquez, Laura; Rojas E., Agustina del V.; Crisante R., Gladys E.; Guevara, Palmira; Añez Reverol, Nestor Oswaldo; Madhubala, Rentala; Ramirez, José Luis (Am. J. Trop. Med. Hyg., 65(5), 2001, 2001)We present a new polymerase chain reaction assay based on telomeric sequences of Leishmania donovani. When this assay was used in dilutions of purified L. donovani DNA, a strong amplification signal was observed with 1 fg ... -
Detection of trypanosoma cruzi and trypanosoma rangeli infection by duplex PCR assay based on telomeric sequences
Chiurillo, Miguel Angel; Crisante R., Gladys E.; Rojas E., Agustina del V.; Peralta, Andreina; Dias, Manuel; Guevara, Palmira; Añez Reverol, Nestor Oswaldo; Ramirez, José Luis (CLINICAL AND DIAGNOSTIC LABORATORY IMMUNOLOGY, Sept. 2003, 2003-09) -
Expression of fluorescent genes in trypanosoma cruzi and trypanosoma rangeli (Kinetoplastida: Trypanosomatidae): Its application to parasite-vector biology
Guevara, Palmira; Dias, Manuel; Rojas E., Agustina del V.; Crisante R., Gladys E.; Abreu Blanco, María Teresa; Umezawa, Eufrosina S.; Vazquez, Martin; Levin, Mariano J.; Añez Reverol, Nestor Oswaldo; Ramirez, José Luis (Journal of Medical Entomology 42(1), 2005-01) -
Expression of GP82 and GP90 surface glycoprotein genes of Trypanosoma cruzi during in vivo metacyclogenesis in the insect vector Rhodnius prolixus
Cordero, Esteban M.; Gentil, Luciana G.; Crisante R., Gladys E.; Ramirez, José Luis; Yoshida, Nobuko; Añez Reverol, Nestor Oswaldo; da Silveira, José Franco (Acta Tropica 105 (2008), 2008)Trypanosoma cruzi, the parasite causing Chagas’ disease, relies on triatomines for its transmission. T. cruzi metacyclic trypomastigotes express GP82 and GP90, which are developmentally regulated surface proteins that have ... -
Myocardial parasite persistence in chronic chagasic patients
Añez Reverol, Nestor Oswaldo; Carrasco Guerra, Hugo A.; Parada F., Henry; Crisante R., Gladys E.; Rojas E., Agustina del V.; Fuenmayor Meza, Carmen Elena; González V., Nestor E.; Percoco, Gloria; Borges P., Rafael E.; Guevara, Palmira; Ramirez, José Luis (Am. J. Trop. Med. Hyg., 60(5), 1999, 1999)The persistence of Trypanosoma cruzi tissue forms was detected in the myocardium of seropositive individuals clinically diagnosed as chronic chagasic patients following endomyocardial biopsies (EMBs) processed by ... -
Predominance of lineage I among Trypanosoma cruzi isolates from Venezuelan patients with different clinical profiles of acute Chagas’ disease
Añez Reverol, Nestor Oswaldo; Crisante R., Gladys E.; Da Silva, Flávia Maia; Rojas E., Agustina del V.; Carrasco Guerra, Hugo A.; Umezawa, Eufrosina S.; Stolf, Anna Maria S.; Ramirez, José Luis; Teixeira, Marta M.G. (Tropical Medicine and International Health. volume 9 no 12, december 2004, 2004-12)Trypanosoma cruzi isolates from 23 acute chagasic patients from localities of Western Venezuela (state of Barinas) where Chagas’ disease is endemic were typed using ribosomal and mini-exon gene markers. Results showed that ... -
Trypanosoma rangeli expresses a gene of the group II trans-sialidase superfamily
Añez Reverol, Nestor Oswaldo; Peralta, Andreina; Crisante R., Gladys E.; Rojas E., Agustina del V.; Añez Rojas, Néstor; Ramirez, José Luis; Chiurillo, Miguel Angel (Molecular & Biochemical Parasitology 142 (2005), 2005)