Debido al notable incremento de poblaciones de Columba livia Linnaeus,1758 en áreas urbanas y por su rol en la transmisión de enfermedades al hombre, animales domésticos y aves de producción, se propuso como objetivo determinar la prevalencia y la abundancia de ectoparásitos en C. livia y su relación con la talla, sexo, peso de las palomas del distrito de Carmen de La Legua, Callao, Perú. Se examinaron 30 palomas: 17 machos y 13 hembras y se colectaron 991 ectoparásitos del plumaje con pinceles embebidos con alcohol 70%, se aclararon con lactofenol de Aman y se examinaron en un microscopio de contraste de fases Carl Zeiss. Se utilizaron las claves de identificación para ectoparásitos. Todas las palomas estaban infestadas con algún ectoparásito, siendo las palomas machos las más afectadas. Se identificaron 10 especies de ectoparásitos, de los cuales 4 fueron del Orden Phthir...

The seasonal incidence of gastric habronemiosis was estimated in three center of breeding equine by the identification of third stage larvae. Fifty animals were studied and the results showed 92% of incidence of habronemiosis. Microscopically the general characteristic of the larvae and their magnitudes let the identificaction like to Habronema muscae (Carter,1 861). In all cases, we found to Musca domestica as responsibility to spread this parasitism in the equines. We did not found significative relations between the age and the grade of parasitism, because the infection in young and adults animals were similar, and between the wounds on the skin with the gastric habronemiosis.

A study about the prevalence of Sarcocystis sp. in bovine, ovine and goat cattle have been performed using the Trichinoscopy method into heart and esophagus tissues. The results showed that 76 samples of heart tissues from bovine positive over a total of 85 samples (89.5%); will 122 samples from ovine were positive over a total of 134 samples (91.04%). In the same tissue of goat only 33 samples (52.4%). Sarcocystis was found in esophagus the parasitism average was as follow: 2% in bovine; 39.8 in ovine and 76.2 in goat. These results achieved that the mayor parasitism in bovine and ovine is located into the heart; whilst in goat the esophagus is the tissue more infect. Therefore a high parasitism by Sarcocystis sp. has been registered in the meat of cattle used as a human food.

Linguatulosis is a zoonosis caused by Linguatula serrata. The nymph and adult stages of the parasite can affect humans, and the man main mechanisms of transmission is through contact with domestic dogs and ingestion of uncooked infected cattle viscera. This study aimed to determine the prevalence, mean abundance, and the mean intensity of the nymphal stage ofL. serrata in mesenteric lymph nodes of cattle slaughtered in two abattoirs in Lima, Peru. The animals were brought from the departments of Puno, Junín, La Libertad, Amazonas, Pasco and Lima. A total of 3576 lymph nodes from 368 cattle were collected, fat was removed and stored at 5 °C. Nodes with micro abscesses, calcified granulomas and yellow, green or gray nodules were selected and longitudinal cuts were done. Nymphs were fixed and mounted for evaluation. Results of the morphometry showed averages of 4.95 mm total length, 1.39 ...

Objectives: To determine growth regulating hormone methoprene larvicide's activity. Design: Experimental study. Setting: Instituto de Investigacion de Ciencias Biologicas Antonio Raimondi, Facultad de Ciencias Biologicas, Universidad Nacional Mayor de San Marcos. Sub-Region de Salud de Madre de Dios. Centro de Investigacion Biologica para el Desarrollo Amazonico. Biologic material: Stages III and IV Aedes aegypti larves. Interventions: Three laboratory bioessays were done to determine regulating hormone methoprene (Altosid)® on 7 000 stages III and IV Aedes aegypti larves, in the laboratory and in Anopheles benarrochi natural breeding places. Larval population was obtained from breeding places located in La Cachuela, La Joya and Las Piedras communities, Tambopata province (Puerto Maldonado), Madre de Dios department. Larvicide activity was determined by 2 methoprene doses, 0,004 and 0,0...

La linguatulosis es una zoonosis causada por Linguatula serrata, parásito que puede afectar al hombre en su estadio ninfal y adulto, siendo los principales mecanismos de transmisión el contacto con el perro doméstico y la ingesta de vísceras infectadas mal cocidas de bovinos. El presente estudio tuvo como objetivo determinar la prevalencia, abundancia e intensidad media del estadio ninfal de L. serrata en ganglios linfáticos mesentéricos yeyuno-iliacos de reses beneficiadas en dos camales de la ciudad de Lima, Perú, procedentes de los departamentos de Puno, Junín, La Libertad, Amazonas, Pasco y Lima. Se recolectaron 3576 ganglios de 368 animales, se les retiró la grasa circundante y refrigeraron a 5 °C hasta su procesamiento. Se realizaron cortes longitudinales en ganglios con microabscesos, granulomas calcificados o con nódulos de color amarillo, verde o gris. Las ninfas cole...

The seasonal incidence of gastric habronemiosis was estimated in three center of breeding equine by the identification of third stage larvae. Fifty animals were studied and the results showed 92% of incidence of habronemiosis. Microscopically the general characteristic of the larvae and their magnitudes let the identificaction like to Habronema muscae (Carter,1 861). In all cases, we found to Musca domestica as responsibility to spread this parasitism in the equines. We did not found significative relations between the age and the grade of parasitism, because the infection in young and adults animals were similar, and between the wounds on the skin with the gastric habronemiosis.

A study about the prevalence of Sarcocystis sp. in bovine, ovine and goat cattle have been performed using the Trichinoscopy method into heart and esophagus tissues. The results showed that 76 samples of heart tissues from bovine positive over a total of 85 samples (89.5%); will 122 samples from ovine were positive over a total of 134 samples (91.04%). In the same tissue of goat only 33 samples (52.4%). Sarcocystis was found in esophagus the parasitism average was as follow: 2% in bovine; 39.8 in ovine and 76.2 in goat. These results achieved that the mayor parasitism in bovine and ovine is located into the heart; whilst in goat the esophagus is the tissue more infect. Therefore a high parasitism by Sarcocystis sp. has been registered in the meat of cattle used as a human food.

Introducción: El estudio evaluó el efecto de la instrumentación mecanizada con el uso de una lima de acabado en la magnitud de gutapercha residual a nivel apical del conducto radicular de premolares inferiores en proceso de retratamiento. Métodos: El conducto radicular de cuarenta premolares inferiores extraídas por motivos ortodóncicos fueron instrumentadas con el sistema ProTaper Next® hasta X4 y obturados con gutapercha y sellador AH Plus® empleando la técnica de compactación lateral. Luego, la muestra se dividió en 4 grupos según el sistema de instrumentación mecanizada empleado para la desobturación de los conductos: grupo 1 (ProTaper Next®), grupo 2 (ProTaper Next® con XP-endo Finisher®), grupo 3 (Reciproc®) y grupo 4 (Reciproc® con XP-endo Finisher®). Los dientes fueron divididos longitudinalmente y se fotografiaron ambas mitades a 1.6X de magnificación bajo u...

El presente trabajo de investigación propuso la aplicación de un taller de juegos verbales orientado a desarrollar la expresión oral en los niños y niñas de cuatro años, la población estuvo formada por tres aulas: “A”, “B” y “C”, con un total de 75 estudiantes, 40 niños y 35 niñas. La muestra fueron dos aulas, el aula “A” que representa el grupo experimental, fueron 25 niños/as, comprende el grupo experimental y el aula “B”, 25, niños/as corresponde al grupo control. Se aplicó y desarrolló el diseño cuasi-experimental, por lo tanto, al grupo experimental se aplicó el programa experimental, a ambos grupos se evaluó mediante un test de expresión oral el cual tuvo un nivel de confianza de Kuder Richardson de 0,826, nivel bueno. Para el desarrollo del proceso de la información cuantitativa se utilizó la estadística descriptiva e inferencial. El grupo e...

El presente trabajo de investigación tuvo como propósito asociar la variable seguridad ciudadana y grupo ocupacional según la percepción de los trabajadores en la municipalidad de La Victoria, periodo 2016. Se diseñó un estudio fue descriptivo correlacional de corte transversal bajo el enfoque cuantitativo. La población incluyó a todos los trabajadores de la sede central de la Municipalidad de La Victoria: 186. La muestra fue no probabilística, el tamaño fue de 1 86 entre profesionales, técnicos y auxiliares, según los criterios de inclusión y exclusión. Para la recolección de datos se utilizó el instrumento cuestionario para medir la seguridad ciudadana, de Espinal, J. (201 6), se obtuvo una confiabilidad con Alpha de Cronbach de 0.872. El análisis estadístico se realizó a través de software SPSS versión 23. Se utilizaron técnicas de estadística descriptiva, se ut...

En la investigación se analiza la frecuencia de uso de las características del sensacionalismo en las noticias de las portadas del diario Correo – Huancayo en el 2014. Para el análisis estadístico descriptivo se realizó la recolección de datos a partir de la lista de cotejo que fue formulada de acuerdo a las características de construcción de la información sensacionalista de Nivea (1994) y del instrumento de análisis de contenido elaborado por Abreu (1993).

In this work we compared the parasitoid activity of the microhymenopterans Spalangia endius and Muscidifurax sp. on the pupae of Musca domestica. The better temperature for the reared was of 25 °C. The cycle of S. endius was completed in 22,6 days, while in Muscidifurax sp. in 14,8 days. The cycle duration was inversely related to temperature, in the females was highest than males. The longevity was similar in both microhymenopterans species (20,7 days in S. endius and 18,6 days in Muscifurax sp.). Spalangia endius oviposited on 175 pupae of M. domestica in 15 days; this value was highest than Muscidifurax that oviposited 140 pupae in 16 days. In both species the highest posture occurred in the third day. Musca domestica pupae with two maturation days were the more parasited; S. endius with 66,4% and Muscidifurax sp. with 60,2% of effective parasitism. The better number of M. domestica ...

The objective of the study was to determine the infectious origin of the alevines mortality and lesions observed in adults of Oncorhynchus mykiss Walbaum 1792, "rainbow trout", in the fishfarm "El Ingenio" using a simple and effective methodology. Alevines, eggs and adult forms and samples of water from ponds were collected. These samples were cultivated on seeds of Cucurbita maxima "calabash" as substrate, where typical colonies had been developing alter seven days. Microscopic characteristics of the hyphae fitted the graphic pattern of Saprolegnia sp. (fungi), which is related to the symptomatology observed in the captured adults. The presence of Saprolegnia sp. would be related to high mortality of alevines registered (40%), probably for importation of eggs contaminated with the fungi. The method was efficient because the substrate has permitted the development 01 the fungi for an eas...

A group of 123 children aged 3 to 6 was chosen to study the effects that Enterobius vermicularis infection has on the school children's educational output. These children were the whole pre-scholar population of the kindergarten rural community in Carabayllo and Santa Rosa de Quives in Lima, Perú. This study included a parasitologic and nutritional examination of the children, using the modified Graham's techniques and the nutritional method of Kanawati-Mc Laren. The result was 34,14 per cent of children with Enterobius vermicularis, and 18,08 per cent with a light protein-caloric malnutrition. The relation between the results from the varianza analysis enables us to conclude that Enterobius vermicularis infection does not have an effect on the children's performance in the school; however we can not generalize on this result because no other intestinal parasites were examined and the i...

In this work we compared the parasitoid activity of the microhymenopterans Spalangia endius and Muscidifurax sp. on the pupae of Musca domestica. The better temperature for the reared was of 25 °C. The cycle of S. endius was completed in 22,6 days, while in Muscidifurax sp. in 14,8 days. The cycle duration was inversely related to temperature, in the females was highest than males. The longevity was similar in both microhymenopterans species (20,7 days in S. endius and 18,6 days in Muscifurax sp.). Spalangia endius oviposited on 175 pupae of M. domestica in 15 days; this value was highest than Muscidifurax that oviposited 140 pupae in 16 days. In both species the highest posture occurred in the third day. Musca domestica pupae with two maturation days were the more parasited; S. endius with 66,4% and Muscidifurax sp. with 60,2% of effective parasitism. The better number of M. domestica ...

The objective of the study was to determine the infectious origin of the alevines mortality and lesions observed in adults of Oncorhynchus mykiss Walbaum 1792, "rainbow trout", in the fishfarm "El Ingenio" using a simple and effective methodology. Alevines, eggs and adult forms and samples of water from ponds were collected. These samples were cultivated on seeds of Cucurbita maxima "calabash" as substrate, where typical colonies had been developing alter seven days. Microscopic characteristics of the hyphae fitted the graphic pattern of Saprolegnia sp. (fungi), which is related to the symptomatology observed in the captured adults. The presence of Saprolegnia sp. would be related to high mortality of alevines registered (40%), probably for importation of eggs contaminated with the fungi. The method was efficient because the substrate has permitted the development 01 the fungi for an eas...

Para validar la influencia que tiene la infección por Enterobius vermicularis en el rendimiento escolar, se tomó una muestra de 123 niños cuyas edades oscilaban de 3 a 6 años y que constituían toda la población escolar de 6 Centros de Educación Inicial, ubicados en las comunidades rurales de Carabayllo y Santa Rosa de Quives, en Lima, Perú. El estudio comprendió, además del examen parasitológico, la determinación del estado nutricional de los niños, utilizando la técnica de Graham modificada y el índice de Kanawati-Mc Laren, respectivamente. Se halló 34,14% de niños parasitados con Enterobius vermicularis y el 18,08% con desnutrición proteico-calórica leve. La correlación de los resultados por medio del análisis de varianza nos permitió concluir, que la infección por Enterobius vermicularis en los preescolares no influye en el rendimiento escolar, aunque no podemos...

Anisakidosis is an infection caused mainly by Anisakis simplex (Rudolphi, 1809), Pseudoterranova decipiens (Krabbe, 1878) Gibson, 1983 and very low frequency around the world by Contracaecum osculatum (Rudolphi, 1802) Baylis, 1920 and Hysterothylacium aduncum (Rudolphi, 1802). In Peru, Deardorff & Overstreet, 1982 en has been identified in Coryphaena hippurus Linnaeus, 1758, but there is no record of the morphometric characteristics of third instar larval stages in smaller teleost fishes. Given the importance of the flying fish Exocoetus volitans Linnaeus, 1758 in the trophic chain of C. hippurus, we believe that this fish would have a very important role in the biological cycle of Hysterothylacium sp. as a paratenic host. The objective of the present work was to identify the morphometric characteristics of the nematode larvae found in E. volitans and to determine their prevalence (P), m...

Seven bioassays in laboratory were carried out in order to evaluate the biocidal capacity of Lonchocarpus utilis (Smith,1930) «barbasco» on 7000 larvae of third and fourth stage of Anopheles benarrochi (Gabaldon,1941), main vector of malaria in Yurimaguas and Loreto. The biocidal activity was probed with two types of quality water. Fresh roots of L. utilis were processed by Vílchez (1993) methodology, it was obtained a fined powder which contains as active ingredient the rotenone. The biocidal activity was measured with 5 doses of powder of the root diluted in distilled water: 6,25; 3,1; 2,1 ; 1,0 and 0,15 g/L. It was used 1 mL of the homogenized as inoculum for dose. Readings were made hourly until the 24 hours post treatment to determine the effectiveness and susceptibility. At the 12 hours post-treatment the doses of 6,25 and 3,1 g/L, obtained 98 and 89% of larval mortality when it...