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Behavioral parameters of six populations of/Wecavs phyllosomus longipennis(Heteroptera:Reduviidae)from areas with high and low prevalences of Trypanosoma cruzi human infection

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Insect Science 2021年第3期28卷 850-860页

作者： Jose Alejandro Martinez-lbarra Benjamin Nogueda-Torres oziel dant. mont.nez-valdez J.Guadalupe Michel-Parra Miguel Angel Ambriz-Santos Laboratories de Entomologia Medica Centro Universitario del SurUniversidad de GuadalajaraCiudad GuzmanJaliscoMexico Cuerpo Academico de Cuencas Humedales y SustentabilidadDepartamento de Ciencias de la NaturalezaCentro Universitario del SurUniversidad de GuadalajaraCiudad GuzmanJaliscoMexico Becario de COFAA Escuela Nacional de Ciencias BioldgicasInstituto Politecnico NacionalCiudad de MexicoMexico

Three behaviors of epidemiological importance,namely feeding latency,feeding duration and defecation latency,for six populations of Meccus phyllosomus longipennis(Usinger)from areas of central,western and north-central Mexico with high(HP)and low(LP)prevalence of Trypanosoma cruzi(Chagas)human infection were evaluated in this *** median feeding latency(the time taken to begin feeding)was highly variable between ***-instar comparisons showed that at least 65%of the LP populations(N3 to adult)started to feed significantly(P<0.05)later than the HP population,with N1 showing no difference,and N2 from LP populations feeding sooner than those from HP *** six populations had similar median feeding durations within instars.A higher(P<0.05)percentage of the instars from HP populations defecated faster than the respective instars from the three LP *** 25%of the young nymphs(N1 to N3)and females in the HP populations defecated<2 min postfeeding,compared with 4%-6%of the young nymphs and 1.3%-3%of females in the LP ***,17.7%-38.8%of the older nymphs(N4 to N5)in the HP populations and 6.8%-13.4%in the LP populations defecated during or immediately after *** results indicate that the HP populations have a greater potential than the LP populations to transmit *** infections,which may underlie the differences in the prevalence of *** infection in some areas where M *** is currently distributed.

关键词： Chagas disease Meccus phyllosomus longipennis populations Mexico Tri-atominae Trypanosoma cruzi vectorial capacity

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Effect of a bacterial inoculum and additive on dry matter in situ degradability of sugarcane silage

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Journal of Integrative Agriculture 2015年第3期14卷 497-502页

作者： José A Reyes-Gutiérrez oziel D montaez-valdez Ramón Rodríguez-Macias Mario Ruíz-López Eduardo Salcedo-Pérez Cándido E Guerra-Medina South University Center University of Guadalajara University Center for Biological and Agricultural Science University of Guadalajara South Coast University Center University of Guadalajara

The objective of this study was to evaluate the effect of adding a bacterial inoculum and a handmade additive to sugarcane silage（SCS） on the in situ digestibility of dry matter（DM）. The treatments were： T1） sugarcane silage（SCS） and T2） sugarcane silage with 1% inoculum and 1% additive（SCS＋）. The bacterial inoculum consisted of 10.0% molasses, 1.0% yogurt, 5.0% chicken manure, 0.5% urea, and 83.0% water, and the additive was formulated with 1.0% urea, 0.1% ammonium sulfate, and 0.25% phosphorus. In situ dry matter digestibility（DMD） was determined using the nylon bag technique with four cows equipped with ruminal fistulas. Cows were fed with ensiled sugarcane supplemented with 1 kg of commercial concentrate. 5 g of ground sample for each sugarcane treatment were weighted in nylon bags and incubated for 4, 8, 12, 24, 48, and 72 h in a completely randomized design with six replicates. The DMD（%） was higher（P〈0.05） for SCS＋ for all incubation times when compared with SCS. There were no differences in ruminal p H between the treatments for all the incubation times. The data suggested that the sugarcane silage with bacterial inoculum and additive could be an alternative for providing forage for ruminants during the season of low growth and quality grass.

关键词： sugarcane silage degradability bacterial cows

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