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Search Results: 1 - 10 of 277687 matches for " Ramón I;Aguilera-Arreola "
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Serogroups, K1 antigen, and antimicrobial resistance patterns of Aeromonas spp. strains isolated from different sources in Mexico
Arteaga Garibay, Ramón I;Aguilera-Arreola, Ma Guadalupe;Navarro Oca?a, Armando;Giono Cerezo, Silvia;Sánchez Mendoza, Miroslava;Molina López, José;Eslava Campos, Carlos;Cravioto, Alejandro;Castro-Escarpulli, Graciela;
Memórias do Instituto Oswaldo Cruz , 2006, DOI: 10.1590/S0074-02762006000200007
Abstract: a total of 221 strains of aeromonas species isolated in mexico from clinical (161), environmental (40), and food (20) samples were identified using the automated system biomérieux-vitek?. antisera for serogroups o1 to 044 were tested using the shimada and sakazaki scheme. the k1 antigen was examined using as antiserum the o7:k1c of escherichia coli. besides, we studied the antimicrobial patterns according to vitek automicrobic system. among the 161 clinical strains 60% were identified as a. hydrophila, 20.4% as a. caviae, and 19.25% as a. veronii biovar sobria. only a. hydrophila and a. veronii biovar sobria were found in food (55 and 90% respectively) and environmental sources (45 and 10% respectively). using "o" antisera, only 42.5% (94/221) of the strains were serologically identified, 55% (121/221) were non-typable, and 2.5% (6/221) were rough strains. twenty-two different serogroups were found, o14, o16, o19, o22, and o34 represented 60% of the serotyped strains. more than 50% of aeromonas strain examined (112/221) expressed k1 encapsulating antigen; this characteristic was predominant among aeromonas strains of clinical origin. resistance to ampicillin/sulbactam and cephazolin was detected in 100 and 67% of aeromonas strain tested for their susceptibility to antibiotics. in conclusion, antibiotic-resistant aeromonas species that possess the k1 encapsulating antigen and represent serogroups associated with clinical syndrome in man are not uncommon among aeromonas strains isolated from clinical, food and environmental sources in mexico.
An in-house multiplex pcr method to detect of putative virulence factors in Aeromonas species
Aguilera-Arreola, Ma. Guadalupe;Martínez, Alma Aidee Carmona;Castro-Escarpulli, Graciela;
Brazilian Journal of Microbiology , 2011, DOI: 10.1590/S1517-83822011000400011
Abstract: a pentaplex pcr was developed and optimised to detect the genes that encode the five most important putative virulence factors in aeromonas isolates. it seems to be more efficient than previously reported techniques and promises to be a powerful tool for more accurate risk assessments and for monitoring pathogenic strains.
Aislamiento e identificación de Aeromonas bestiarum a partir de carpa común de cultivo (Cyprinus carpio L.) procedentes de Santa María Chapa de Mota, Estado de México, México
Edgardo Soriano-Vargas,Graciela Castro-Escarpulli,Ma. Guadalupe Aguilera-Arreola,Fernando Vega-Castillo
Veterinaria México , 2010,
Abstract: Se informa por primera ocasión el aislamiento de Aeromonas bestiarum a partir de carpa común (Cyprinus carpio L.) de cultivo, procedente de Santa María Chapa de Mota, Estado de México, México. Se enfatiza la identificación genética para la diferenciación entre A. salmonicida y A. bestiarum.
Aislamiento e identificación de Aeromonas bestiarum a partir de carpa común de cultivo (Cyprinus carpió L.) procedentes de Santa María Chapa de Mota, Estado de México, México
Soriano-Vargas, Edgardo;Castro-Escarpulli, Graciela;Aguilera-Arreola, Ma. Guadalupe;Vega-Castillo, Fernando;Salgado-Miranda, Celene;
Veterinaria México , 2010,
Abstract: the isolation of aeromonas bestiarum from common carps (cyprinus carpio l.), cultivated at santa maria chapa de mota, is reported for the first time. the genetic identification for differentiating a. bestiarum from a. salmonicida is here emphasized.
Darwin y la selección de los mediocres, o el descuido contemporáneo de la propia situación
Ramón Rodríguez Aguilera
Política y Sociedad , 1989, DOI: -
Abstract: Sin resumen
Entre el socialismo y el pacifismo o la recuperación crítica del presente: el caso de E.P. Thompson
Ramón Rodríguez Aguilera
Política y Sociedad , 1988, DOI: -
Abstract: Sin resumen
Comparison of relative abundance and diversity of coccinellids (Coleoptera: Coccinellidae) in blueberries (Vaccinium corymbosum L.), under two production systems in the La Araucanía Region, Chile
Vera,Marcela; Aguilera,Alfonso; Rebolledo,Ramón;
Ciencia e investigación agraria , 2010, DOI: 10.4067/S0718-16202010000200012
Abstract: coccinellids have been used, throughout the world, in biological control programs of agriculture pests. in chile this family has been studied by various authors, which addresses issues such as biology, predatory activity and distribution in herbaceous species, shrubs and trees, but their situation in blueberries, where there is an abundance of species, is unknown coccinellid beetles were counted visually on two blueberry orchards, under organic and conventional management. this study was conducted at the maquehue experiment station, in the central valley of "la araucanía región" in southern chile, from september 2007 through may 2008 and was divided into two periods: from september 2007 through february 2008 with visual counts only on the foliage of the plants, and from march through may 2008 counts were done on the foliage and on of the plant in the soil around the plants. the greatest number of species was recorded in the organic garden in both sampling periods, but species diversity was the same for both production systems. specify results better.
Klein,Carlos; Rebolledo,Ramón; Cerda,Claudia; Aguilera,Alfonso;
Gayana (Concepción) , 2005, DOI: 10.4067/S0717-65382005000200006
Abstract: the lucerne flea s. viridis (l.) is a secondary pest of recent introduction to chile that has archevied more importance in lucerne in the central-south part of the country. the study was conducted in the former experimental station maipo of the university of la frontera in temuco, in the agroecological area of the central plain, and in the regional research center inia carillanca in the preandean area. the population variation was studied in both areas using a standard entomological net every 15 days in the period from june 1996 to march 1997, as well as the eventual natural enemies. the results shows in the central plain a low population from june to august, but an increase up to 14,3 individual per m2 in september, declining strongly from october to march. in the preandean area two peaks occurred, both during the second halfs of october to november with a peak of 15,8 individual per m2. during the summer months january to february no specimens were collected. the relation between the population variation and the size of lucerne was statistically significance in the central plain, but not in the preandean area. the only natural enemie found was the bug nabis punctipennis (blanchard) feeding on s. viridis, when this species was in summer diapause
Ciclo Vital de Adalia angulifera Mulsant (Coleoptera: Coccinellidae) Sobre el Pulgón del Avellano Europeo Myzocallis coryli (Goeze) (Hemiptera: Aphididae)
Aguilera P,Alfonso; Rebolledo R,Ramón; Klein K,Carlos;
Agricultura Técnica , 2006, DOI: 10.4067/S0365-28072006000300010
Abstract: adalia angulifera mulsant is a coccinellid predator of the hazelnut aphid, myzocallis coryli (goeze), which is specific of hazelnut, of corylus avellana l., in the la araucanía, chile. the life cycle was studied in the carillanca experimental station of the national agricultural research institute (inia), temuco, chile (38o41? s lat; 72o 25? w long; 200 m.o.s.l.). coccinellids and aphids were reared under laboratory, conditions at 19.23 ± 2.71oc; 60.78 ± 3.34% of relative humidity and a variable photoperiod of 14 to 16 h of natural light from october to november. under these conditions, the life cycle of a. angulifera was completed in 37.39 ± 1.55 days with a range of 24-59 days. the egg stage represented 18% of the life cycle, the larval stage 58.3% and the pupa 23.7%. the larvae stage also presented three, four and five instars, being four the most common. larvae with three and five instars had a longer life period. adult longevity was 71 ± 59.79 days with a range of 32-249 days. female longevity was 72.25 ± 67.41 days with a range of 34-249 days, while males lived 67.67 ± 31.20 days with a range of 32-108 days. this study concluded that a. angulifera had three generations, in adults were observed in winter diapause, under bark tree or in the scrack of fence posts in the la araucanía.
Nuevos registros de insectos fitófagos asociados a canelo (Drimys winteri Forst.) en La Araucanía
Priscilla Brebi,M; Aguilera,Alfonso; Ojeda,Nelson; Rebolledo,Ramón;
Idesia (Arica) , 2011, DOI: 10.4067/S0718-34292011000200013
Abstract: abstract in this work it was necessary to determine the species of insects associated with drimys winteri forst. (canelo) at two locations of la araucania. one corresponds to a rural sector (sector comuy), and another city (temuco). in each sector were elected three trees to collect samples. the experimental design used in this research plots corresponded to completely at random, choosing three units show with a total of eight different dates in the 2006 season. the results of the sampling helped identify as new records for la araucania the following species: trialeurodes unadutus (hemiptera, aleyrodidae); haeliothrips haemorhoidalis (thysanoptera, thripidae) and hemiberlesia rapax (hemiptera, diaspididae). in addition, there was a winder lepidopterous leaves, but his determination was not possible because there was only damage caused in the leaf. both areas were the same species but with differences in the averages and the relative abundance.
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