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Ecatepec, Mexico

Miranda-Miranda E.,National Research Center Disciplinaria en Parasitologia Veterinaria | Cossio-Bayugar R.,National Research Center Disciplinaria en Parasitologia Veterinaria | Martinez-Ibanez F.,Servicio Nacional de Sanidad | Bautista-Garfias C.R.,National Research Center Disciplinaria en Parasitologia Veterinaria
Medical and Veterinary Entomology

Different laboratory cultures of the acarine tick Rhipicephalus (Boophilus) microplus (Canestrini, 1888) (Ixodida: Ixodidae) were infested by small Megaselia scalaris (Loew, 1866) (Diptera: Phoridae) flies. Larvae of this species exhibited opportunistic parasitism predominantly on engorged female ticks, causing severe damage to their cuticle through which the flies were able to reach R. microplus internal organs, on which they fed until developing into pupae in the tick's remains. The flies were kept by continuous propagation on fresh ticks over six generations during which the same parasitoid behaviour was observed. Here we report on an ixodid tick laboratory culture used for rearing M. scalaris. Medical and Veterinary Entomology © 2010 The Royal Entomological Society. No claim to original US government works. Source

de la Mora L.A.J.S.,National Autonomous University of Mexico | Ramos J.G.,National Autonomous University of Mexico | Lopez H.S.,National Autonomous University of Mexico | Sanchez H.F.,Servicio Nacional de Sanidad
Veterinaria Mexico

The illegal use of clenbuterol in feeding of cattle has caused outbreaks of food poisoning in humans that consume beef and internal organs. Since 2007, with the modification of the Ley Federal de Sanidad Animal, the use of clenbuterol as growth promoter is penalized and coordinated actions are announced between the Secretaria de Salud (SSA) and the Secretaria de Agricultura, Ganaderia, Desarrollo Rural, Pesca y Alimentacion (Sagarpa) on concurrent issues. This study analyzed the implementation of the procedures in the public health sector, as well as the coordinated activities between SSA and Sagarpa in Queretaro and Jalisco states in Mexico. Results indicate that a higher degree of collaboration between these two institutions is required in the exchange of information from Sagarpa to SSA derived from penal procedures, as well as in the identification of improvement action procedures, thus optimizing the results achieved by both institutions in concurring actions related to sanitary surveillance of clenbuterol use. Source

Bertolini V.,Colegio de Mexico | Cruz-Blasi J.,Servicio Nacional de Sanidad | Damon A.,Colegio de Mexico | Mora J.V.,Colegio de Mexico
Acta Botanica Brasilica

Orchids establish symbiosis with Rhizoctonia mycorrhizal fungi, forming the characteristic pelotons within the cells of the root cortex. Under natural conditions, terrestrial and epiphytic orchids have different levels of dependence upon the fungal symbiont, although various authors have mentioned that once orchid plants reach maturity the interaction becomes weaker and intermittent. Recent evidence shows that in some epiphytic orchid species mycorrhization is constant and systematic. In three species of wild orchids from southeast Mexico, we show that mycorrhization is systematically present in roots of different ages, in the wet and dry seasons. We demonstrate that the volume of the root that is colonized depends upon the quantity of rainfall and the diameter of the root, and that rainfall also determines the presence of fresh, undigested pelotons. In very thin roots, mycorrhizal colonization occupies a considerable proportion of the cortex, whereas in thicker roots the proportion of the volume of the root cortex colonized is lower. © 2014, Sociedade Botanica do Brasil. All rights reserved. Source

Saucedo-Carabez J.R.,Colegio de Mexico | Teliz-Ortiz D.,Colegio de Mexico | Ochoa-Ascencio S.,Universidad Michoacana de San Nicolas de Hidalgo | Ochoa-Martinez D.,Colegio de Mexico | And 2 more authors.
European Journal of Plant Pathology

The total yield of cv. Hass and Mendez avocado trees was evaluated in Grove 1 in Uruapan county: four trees were sunblotch-infected, four asymptomatic (molecularly positive), and four healthy. A further four healthy and four symptomatic trees were evaluated in Grove 2 in Tingambato county. There was a significant 75 % reduction in the total Hass fruit weight from symptomatic trees in Grove 1 (213 kg vs 751 kg in healthy trees) and a 52 % reduction (124 kg vs 255 kg) in Grove 2 (Tukey, p = 0.05). This reduction was more severe in Mendez: 83 % in Grove 1 (183 kg vs 1,053 kg) and 76 % in Grove 2 (82 kg vs 340 kg). Yield of asymptomatic trees was reduced to 58 % in Mendez and 30 % in Hass. The average weight of 100 fruits was reduced by 13-28 % in Hass and 20-27 % in Mendez in Groves 2 and 1 respectively. The equatorial diameter of 100 symptomatic fruits was 8 % lower in Hass in both groves, and 20-28 % lower in Mendez. The polar diameter decreased by 8-10 % in Hass and 10-11 % in Mendez. The incidence of symptomatic fruits was 46-62 % in Hass and 20-28 % in Mendez. Yield of ASBVd symptomatic Hass and Mendez trees was significantly reduced and fruit morphology negatively affected. © 2013 KNPV. Source

Lopez R.N.,Servicio Nacional de Sanidad | Salinas L.V.,U.S. Department of Agriculture | Chavez S.A.,Autonomous University of Chiapas | Gonzalez I.L.,Servicio Nacional de Sanidad | And 2 more authors.
Revista Mexicana De Ciencias Pecuarias

The present study aims to improve the surveillance system of vesicular diseases in Mexico, using the strategic planning system, by identifying endemic areas in which the New Jersey serotype viral lineages are stable and by analyzing the information generated during 32 yr of monitoring. We show the necessary elements for building the Matrix of Results Indicators (MRI) that could be used on the vesicular diseases surveillance program in Mexico and in other affected countries. The results that allowed the characterization of the epidemiological areas where the virus of vesicular stomatitis (VS) remains in a secular way in Mexico are presented. Elements for disease prevention are also provided in order to improve the live animal international trade. Source

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