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1.
Bol. malariol. salud ambient ; 49(1): 127-134, jul. 2009. ilus
Article in Spanish | LILACS | ID: lil-630401

ABSTRACT

El objetivo del presente trabajo fue analizar las creencias populares que tienen los pobladores de la localidad de Santa Ana de los Guácaras, corrientes, Argentina sobre los parásitos y las enfermedades producidas por éstos y conocer los hábitos sanitarios en relación con las parasitosis. Se realizó un estudio de corte cualitativo. Se relevaron 39 hogares seleccionados de modo accidental en los que se aplicó una entrevista no estructurada al padre o madre de familia sobre los conocimientos acerca de los parásitos y las enfermedades que producen, síntomas y efectos, modos de prevención, transmisión, tratamiento y sobre hábitos sanitarios. El análisis de los datos se realizó conforme a la perspectiva de abordar el proceso de salud-enfermedad en función de las dimensiones propias de la esfera de la subjetividad. Para los pobladores la enfermedad parasitaria tiene una acepción restringida pues descartan las ectoparasitosis, las parasitosis infantiles son asumidas como naturales, lo que conduce a una actitud fatalista, que a su vez conlleva a no emprender estrategias de control. Se observa una inversión de las cadenas causales, hecho que provocan rupturas a la hora de relacionar todos los elementos vinculados en los ciclos de enfermedades parasitarias. Con este aporte se espera brindar herramientas para la comprensión sobre la permanencia de las parasitosis en Santa Ana de los Guácaras a fin de definir estrategias de previsión y control.


The purpose of the present work was to analyze the popular beliefs that people of Santa Ana de los Guácaras, Corrientes, Argentina, have on parasites and diseases they produce. Additionally, their health habits related to were investigated. A qualitative study was carried out. Thirty nine dwellings were randomly selected and a non structured interview was conducted with the father or mother of the family to investigate their knowledge on parasites and diseases that produce, symptoms and effects, methods of prevention, transmission, treatment and health habits. Data analysis was performed according to the perspective of addressing the health-disease process in accordance with the realm of their subjectivity. Results showed that parasitoses have a restricted meaning, since people do not take into account ectoparasites and parasitic diseases in children are assumed as natural, which leads to a fatalistic attitude, that in turn leads to not taking any control measures. There is a reversal of the causal chains, which cause breaks to relate all the elements linked to the cycles of parasitic diseases. This contribution is expected to provide tools for understanding the persistence of parasitic diseases in Santa Ana de los Guácaras and consequently, to define strategies for prevention and control.


Subject(s)
Humans , Male , Female , Parasitic Diseases/diagnosis , Parasitic Diseases/epidemiology , Parasitic Diseases/ethnology , Parasitic Diseases/parasitology , Parasitic Diseases/prevention & control , Parasitic Diseases/psychology , Parasites/parasitology , Health Knowledge, Attitudes, Practice/ethnology , Disease Transmission, Infectious/prevention & control
2.
Bol. malariol. salud ambient ; 48(1): 53-60, ene.-jul. 2008. tab
Article in Spanish | LILACS | ID: lil-503692

ABSTRACT

El objetivo de este trabajo fué conocer las percepciones y conductas respecto a Tunga penetrans de los habitantes de la localidad de Santa Ana de los Guácaras, Corrientes, Argentina. Se relevaron 46 hogares seleccionados de modo accidental, donde se aplicó una encuesta semiestructurada. En 182 personas evaluadas, se registró una infestación de 68,1%, siendo niños y mujeres los más afectados, con lesiones en pies y manos más frecuentemente. 98% (n=63) de los perros evaluados estaban infestados. 34,8% de las personas reconoció a “tunga” como una pulga, aunque nadie conocía el ciclo de vida ni el mecanismo de transmisión. Los pobladores usan un instrumento punzante para extraer la pulga de la piel y 47,8% se desinfecta posteriormente. La persistencia de tungiasis en el área puede atribuirse a diseminación por animales, falta de su valoración como problema de salud, desconocimiento de métodos de combate y falta de planificación comunitaria para adoptar medidas de control.


Subject(s)
Humans , Behavior , Disease Transmission, Infectious , Perception , Siphonaptera/parasitology , Argentina , Biology , Parasitology
3.
Medicina (B Aires) ; 67(3): 238-42, 2007.
Article in Spanish | MEDLINE | ID: mdl-17628910

ABSTRACT

The aim of the present investigation was to evaluate the importance of enteroparasitosis in a young urban population. The relationship between enteroparasitosis in this population and biological and environmental conditions was established for 113 infants between 0 and 14 years. Serial stool samples were analyzed and Graham tests were performed in each infant. The degree of nutrition of each infant was also assessed. Environmental data were collected via semi-structured surveys. Soil samples were tested to determine the degree of soil contamination. The following species were identified: Blastocystis hominis, Enterobius vermicularis, coccidios, Giardia intestinalis, hookworms, Strongyloides stercoralis, Trichuris trichura, Ascaris lumbricoides, Entamoeba coli, Endolimax nana and Taenia sp. Children infection prevalence was 73.5%. The frequency of enteroparasitosis was largest in the population from 3 to 8 years. The homes of the children analyzed were brick houses with tin roof and access to tap water. A 79.5% of these houses had bathrooms. The remaining used outdoors latrines. In 95.5% of these houses, the residents lived with one or more dogs and cats. The soil collected from nine houses was contaminated with infectious forms of Toxocara canis and ancilostomideos. The relationship between parasitosis and latrines and overcrowding was verified. Five cases of malnutrition were detected (4.4%). The relevance of physical and cultural factors in relation to enteric parasitosis suggests that the pharmacological treatment should be accompanied with preventive measures regarding hygiene and proper elimination of human and pet faeces.


Subject(s)
Intestinal Diseases, Parasitic/epidemiology , Nutritional Status , Urban Population/statistics & numerical data , Adolescent , Age Factors , Animals , Argentina/epidemiology , Cats , Child , Child, Preschool , Culture , Dogs , Environment , Eukaryota/isolation & purification , Feces/parasitology , Female , Helminths/isolation & purification , Humans , Infant , Infant, Newborn , Intestinal Diseases, Parasitic/parasitology , Intestinal Diseases, Parasitic/transmission , Male , Prevalence , Residence Characteristics , Risk Factors , Soil/parasitology
4.
Bol. malariol. salud ambient ; 47(2): 199-204, 2007. tab
Article in Spanish | LILACS | ID: lil-503707

ABSTRACT

El objetivo del presente trabajo de investigación fue evaluar factores biológicos y ambientales en relación a las helmintiasis caninas de importancia zoonótica, en viviendas urbanas del Nordeste Argentino. Se investigaron 44 unidades domésticas de un área urbana. Se recolectaron datos referidos a variables biológicas de los canes (sexo, edad y raza) y a características del ambiente. Se tomaron muestras de materia fecal de los perros y el suelo de las viviendas. Se realizó el diagnóstico de helmintiasis caninas y se evaluó la presencia de formas infectivas en el suelo. Se constató la presencia de 53 perros en 29 del total de viviendas analizadas; el número máximo de perros observado en una vivienda fue cinco. La proporción de sexos fue 21 hembras y 32 machos. La edad promedio de los canes fue 3,8 años y la raza mestiza fue la predominante. Se obtuvieron muestras de materia fecal del 56,6% de los perros observados; la prevalencia de helmintiasis fue 70,0%, los ancilostomideos fueron los más frecuentes (63,3%), seguidos por Toxocara canis y Trichuris vulpis (16,7% y 3,3%, respectivamente). Se comprobó mayor infección parasitaria en los machos con respecto a las hembras. La mayor frecuencia parasitaria se verificó en la franja etaria de cero a dos años. Se observaron formas parasitarias en las muestras de suelo de 45,5% de las viviendas analizadas. Doce de estas viviendas presentaron larvas de ancilostomideos, seis presentaron huevos de T. canis y dos ambos helmintos. Los resultados demuestran la relevancia del entorno doméstico como un ambiente favorable para la transmisión de las helmintiasis caninas de importancia zoonótica.


Subject(s)
Animals , Dogs , Environment , Helminthiasis , Toxocara canis , Argentina , Environmental Health , Zoonoses
5.
Medicina (B.Aires) ; 67(3): 238-242, 2007. tab
Article in Spanish | LILACS | ID: lil-483414

ABSTRACT

El objetivo del presente trabajo fue evaluar las enteroparasitosis en una población infantil urbana y establecer su relación con factores biológicos y condiciones ambientales. Se investigaron 113 niños entre 0 y 14 años de edad. En cada niño se realizaron exámenes coproparasitológicos y test de Graham y se valoró el estado nutricional. Para el registro de datos ambientales se aplicaron encuestas semiestructuradas. Se analizó la contaminación del suelo. Se identificó Blastocystis hominis, Enterobius vermicularis, coccidios, Giardia intestinalis, uncinarias, Strongyloides stercoralis, Trichuris trichura, Ascaris lumbricoides, Entamoeba coli, Endolimax nana y Taenia sp. La prevalencia de parasitados fue 73.5%. Se verificó mayor frecuencia de enteroparasitosis en la franja etaria de 3 a 8 años. Las viviendas analizadas (n=44) eran de material con techo de chapa, contaban con red de agua potable; el 79.5% poseía baño instalado, las restantes poseían letrinas. En el 95.5% de las unidades domésticas había uno o más perros y gatos. El suelo de nueve viviendas estuvo contaminado con formas infectantes de Toxocara canis y ancilostomídeos. Se comprobó asociación entre parasitosis y uso de letrinas y hacinamiento. Se detectaron cinco casos de desnutrición grado I (4.4%). Se pone de manifiesto la trascendencia de los factores físicos y culturales como condicionantes de las parasitosis entéricas lo que sugiere que se debe insistir, simultáneamente al tratamiento farmacológico, en las medidas preventivas relacionadas con la higiene y la adecuada eliminación de las excretas humanas y de los animales domésticos.


The aim of the present investigation was to evaluate the importance of enteroparasitosis in a young urban population. The relationship between enteroparasitosis in this population and biological and environmental conditions was established for 113 infants between 0 and 14 years. Serial stool samples were analyzed and Graham tests were performed in each infant. The degree of nutrition of each infant was also assessed. Environmental data were collected via semi-structured surveys. Soil samples were tested to determine the degree of soil contamination. The following species were identified: Blastocystis hominis, Enterobius vermicularis, coccidios, Giardia intestinalis, hookworms, Strongyloides stercoralis, Trichuris trichura, Ascaris lumbricoides, Entamoeba coli, Endolimax nana and Taenia sp. Children infection prevalence was 73.5%. The frequency of enteroparasitosis was largest in the population from 3 to 8 years. The homes of the children analyzed were brick houses with tin roof and access to tap water. A 79.5% of these houses had bathrooms. The remaining used outdoors latrines. In 95.5% of these houses, theresidents lived with one or more dogs and cats. The soil collected from nine houses was contaminated with infectious forms of Toxocara canis and ancilostomideos. The relationship between parasitosis and latrines and overcrowding was verified. Five cases of malnutrition were detected (4.4%). The relevance of physical and cultural factors in relation to enteric parasitosis suggests that the pharmacological treatment should be accompanied with preventive measures regarding hygiene and proper elimination of human and pet faeces.


Subject(s)
Humans , Animals , Male , Female , Infant, Newborn , Infant , Child, Preschool , Child , Adolescent , Cats , Dogs , Environment , Intestinal Diseases, Parasitic/epidemiology , Nutritional Status , Urban Population/statistics & numerical data , Age Factors , Argentina/epidemiology , Culture , Eukaryota , Feces/parasitology , Helminths/isolation & purification , Intestinal Diseases, Parasitic/parasitology , Intestinal Diseases, Parasitic/transmission , Prevalence , Residence Characteristics , Risk Factors , Soil/parasitology
6.
Medicina (B.Aires) ; 67(3): 238-242, 2007. tab
Article in Spanish | BINACIS | ID: bin-123476

ABSTRACT

El objetivo del presente trabajo fue evaluar las enteroparasitosis en una población infantil urbana y establecer su relación con factores biológicos y condiciones ambientales. Se investigaron 113 niños entre 0 y 14 años de edad. En cada niño se realizaron exámenes coproparasitológicos y test de Graham y se valoró el estado nutricional. Para el registro de datos ambientales se aplicaron encuestas semiestructuradas. Se analizó la contaminación del suelo. Se identificó Blastocystis hominis, Enterobius vermicularis, coccidios, Giardia intestinalis, uncinarias, Strongyloides stercoralis, Trichuris trichura, Ascaris lumbricoides, Entamoeba coli, Endolimax nana y Taenia sp. La prevalencia de parasitados fue 73.5%. Se verificó mayor frecuencia de enteroparasitosis en la franja etaria de 3 a 8 años. Las viviendas analizadas (n=44) eran de material con techo de chapa, contaban con red de agua potable; el 79.5% poseía baño instalado, las restantes poseían letrinas. En el 95.5% de las unidades domésticas había uno o más perros y gatos. El suelo de nueve viviendas estuvo contaminado con formas infectantes de Toxocara canis y ancilostomídeos. Se comprobó asociación entre parasitosis y uso de letrinas y hacinamiento. Se detectaron cinco casos de desnutrición grado I (4.4%). Se pone de manifiesto la trascendencia de los factores físicos y culturales como condicionantes de las parasitosis entéricas lo que sugiere que se debe insistir, simultáneamente al tratamiento farmacológico, en las medidas preventivas relacionadas con la higiene y la adecuada eliminación de las excretas humanas y de los animales domésticos.(AU)


The aim of the present investigation was to evaluate the importance of enteroparasitosis in a young urban population. The relationship between enteroparasitosis in this population and biological and environmental conditions was established for 113 infants between 0 and 14 years. Serial stool samples were analyzed and Graham tests were performed in each infant. The degree of nutrition of each infant was also assessed. Environmental data were collected via semi-structured surveys. Soil samples were tested to determine the degree of soil contamination. The following species were identified: Blastocystis hominis, Enterobius vermicularis, coccidios, Giardia intestinalis, hookworms, Strongyloides stercoralis, Trichuris trichura, Ascaris lumbricoides, Entamoeba coli, Endolimax nana and Taenia sp. Children infection prevalence was 73.5%. The frequency of enteroparasitosis was largest in the population from 3 to 8 years. The homes of the children analyzed were brick houses with tin roof and access to tap water. A 79.5% of these houses had bathrooms. The remaining used outdoors latrines. In 95.5% of these houses, theresidents lived with one or more dogs and cats. The soil collected from nine houses was contaminated with infectious forms of Toxocara canis and ancilostomideos. The relationship between parasitosis and latrines and overcrowding was verified. Five cases of malnutrition were detected (4.4%). The relevance of physical and cultural factors in relation to enteric parasitosis suggests that the pharmacological treatment should be accompanied with preventive measures regarding hygiene and proper elimination of human and pet faeces.(AU)


Subject(s)
Humans , Animals , Male , Female , Infant, Newborn , Infant , Child, Preschool , Child , Adolescent , Cats , Dogs , Intestinal Diseases, Parasitic/epidemiology , Urban Population/statistics & numerical data , Nutritional Status , Environment , Intestinal Diseases, Parasitic/parasitology , Intestinal Diseases, Parasitic/transmission , Soil/parasitology , Feces/parasitology , Eukaryota/isolation & purification , Helminths/isolation & purification , Prevalence , Age Factors , Risk Factors , Demography , Culture , Argentina/epidemiology
7.
Rev Saude Publica ; 39(2): 211-6, 2005 Apr.
Article in Spanish | MEDLINE | ID: mdl-15895140

ABSTRACT

OBJECTIVE: To obtain T. rubrovaria population parameters in order to describe its demographic characteristics. METHODS: The study was carried out in the laboratory of Arthropods, Corrientes, Argentina, from October 2000 to February 2003. Eggs were grouped to form five 100-egg cohorts. Insects were fed on chickens (Gallus domesticus). The cohorts were monitored weekly and kept under controlled temperature (28 +/- 3 degrees C) and relative humidity (63 +/- 10%). A life table was constructed and other vital statistics were calculated and recorded. RESULTS: Higher mortality was recorded in the first through the fourth nymphal stadium. A constant decrease was seen from the fifth nymphal instar. Life expectancy dropped linearly after overcoming the critical stages. Adults mean survival was 50.2 weeks. The first oviposition was after 40.6 weeks. The fecundity was 859.6 eggs with an average 22.8 eggs per female. The reproductive period was 37.7 weeks. The generation time was 55.3 weeks and the net reproduction rate was 133.7. The intrinsic rate of weekly increment was 0.088. In a stable age distribution the population would be composed of 25.3% eggs, 72.3% nymphs and 2.4% adults. Adults accounted for more than 70% of the total reproductive value. CONCLUSIONS: Triatoma rubrovaria had a long survival as imago, a late first reproduction and a low intrinsic rate of natural increase.


Subject(s)
Laboratories , Life Cycle Stages/physiology , Triatoma/growth & development , Animals , Cohort Studies , Female , Humidity , Life Expectancy , Male , Reproduction/physiology , Temperature , Triatoma/physiology
8.
Rev. saúde pública ; 39(2): 211-216, abr. 2005. ilus, tab
Article in Spanish | LILACS | ID: lil-401857

ABSTRACT

OBJETIVO: Obtener parámetros poblacionales de T. rubrovaria a fin de caracterizar demográficamente a esta especie. MÉTODOS: La investigación se realizó entre octubre de 2000 y febrero de 2003 en el laboratorio de artrópodos, Corrientes, Argentina. Se conformaron cinco cohortes de 100 huevos cada una. Los insectos se alimentaron sobre gallina (Gallus domesticus). Las cohortes se controlaron semanalmente. La experiencia se llevó a cabo en condiciones controladas de temperatura (28±3ºC) y humedad relativa del aire (63±10 por ciento). Se elaboraron tablas completas de vida y se obtuvieron estadísticos vitales. RESULTADOS: La mayor mortalidad se registró en ninfas de primero a cuarto estadio. A partir del quinto estadio el número de individuos decreció en forma constante. La expectativa de vida, después de superar las edades críticas, disminuyó en forma lineal. La supervivencia media de los adultos fue 50,2 semanas. La primera oviposición ocurrió a las 40,6 semanas. La fecundidad fue 859,6 huevos, con una media de 22,8 huevos. El período reproductivo fue de 37,7 semanas. El tiempo generacional fue de 55,3 semanas y la tasa neta de reproducción 133,7. La tasa intrínseca de incremento natural resultó 0,088. En una distribución estable de edades 25,3 por ciento correspondería al estado de huevo, 72,3 por ciento al estado ninfal y 2,4 por ciento al estado adulto. Los adultos contribuyeron con más del 70 por ciento al valor reproductivo total. CONCLUSIONES: Triatoma rubrovaria se caracterizó por una supervivencia prolongada como imago, una edad de la primera reproducción tardía y una tasa intrínseca de incremento natural baja.


Subject(s)
Life Cycle Stages , Reproduction , Life Tables , Triatoma/growth & development
9.
Rev. saúde pública ; 37(1): 59-64, fev. 2003. ilus, tab
Article in Spanish | LILACS | ID: lil-326404

ABSTRACT

OBJETIVO: El objetivo del presente trabajo fue investigar la colonización por triatominos en ambientes domésticos y peridomésticos y evaluar la seroprevalencia de infectados chagásicos en localidades rurales. MÉTODOS: La investigación se realizó en General Paz, Corrientes, Argentina. Las viviendas y peridomicilios se seleccionaron mediante un muestreo simple al azar. La búsqueda de triatominos se efectuó por el método captura/hora/hombre. Los insectos se identificaron taxonómicamente y se clasificaron según sexo y edad. La infección por Trypanosoma cruzi se detectó por observación directa de las heces al microscopio y por la técnica de la reacción en cadena de la polimerasa (PCR). Se evaluaron serológicamente a pobladores voluntarios mediante las técnicas de hemaglutinación indirecta (HAI) y ensayo inmunoenzimático (ELISA). Se hallaron los índices de infestación, densidad, colonización, infección natural y dispersión. RESULTADOS: Se analizaron 42 viviendas y 50 peridomicilios. En el domicilio los índices de infestación e infección de Triatoma infestans fueron 23,8 y 19,4 respectivamente. Los índices de densidad, colonización y dispersión fueron 2,1; 47,0 y 50,0 respectivamente. La infestación del peridomicilio por T. infestans fue 5,9 por ciento y por T. sordida 11,8 por ciento. T. sordida resultó infectada por Trypanosoma cruzi en un 2,0 por ciento. La seroprevalencia al T. cruzi de los 85 pacientes fue del 22,3 por ciento. CONCLUSIONES: Se estima que en el área investigada la transmisión del T. cruzi está interrumpida. Sin embargo, la presencia de infectados humanos y de T. infestans parasitadas posibilitan el reinicio del ciclo de transmisión. Se proponen acciones de rociado con insecticidas con el objeto de eliminar las poblaciones del vector


Subject(s)
Triatoma , Trypanosoma , Trypanosoma cruzi , Chagas Disease/epidemiology , Seroepidemiologic Studies
10.
Rev Saude Publica ; 37(1): 59-64, 2003 Feb.
Article in Spanish | MEDLINE | ID: mdl-12488921

ABSTRACT

OBJECTIVE: The aim of this study was to evaluate triatomine colonization in domestic and peridomestic ecotopes and to assess the seroprevalence of Chagas' disease in rural areas. METHODS: The study was carried out in the province of General Paz, Corrientes, Argentina. Human dwellings and peridomestic ecotopes were randomly selected. Triatomines were collected using the man/hour/capture method. The insects were taxonomically determined and classified by age and sex. Trypanosoma cruzi infection was detected through direct microscopy of feces and polymerase chain reaction (PCR). Diagnosis of Chagas infection in volunteer residents was performed using indirect hemagglutination (IHA) and immunoenzimatic assay (ELISA). Infestation, density, colonization, natural infection and dispersion indexes were recorded. RESULTS; A total of 42 households and 50 peridomestic areas were examined. Triatoma infestans domestic infestation and infection indexes were 23.8 and 19.4; respectively. Density, colonization and dispersion indexes were 2.1; 47.0 and 50.0; respectively. Of all, 5.9% of peridomiciles were infested by T. infestans and 11.8% by Triatoma sordida. Trypanosoma cruzi infection was observed in 2.0% of T. sordida. The seroprevalence rate obtained from 85 human sera analyzed was 22.3%. CONCLUSIONS: The results suggest a halt in T. cruzi transmission in the study area. Nevertheless the presence of seroreactive individuals and infected T. infestans vectors might facilitate the resurgence of the transmission cycle. Control actions with the use of insecticides might be considered in order to eliminate vector populations.


Subject(s)
Chagas Disease/epidemiology , Insect Vectors/parasitology , Triatoma/parasitology , Trypanosoma cruzi/isolation & purification , Adolescent , Adult , Aged , Aged, 80 and over , Animals , Antibodies, Protozoan/blood , Argentina/epidemiology , Chagas Disease/blood , Chagas Disease/transmission , Child , Child, Preschool , Female , Humans , Infant , Male , Middle Aged , Seroepidemiologic Studies , Trypanosoma cruzi/immunology
11.
Parasitol. latinoam ; 57(3/4): 119-123, jul.-dic. 2002. mapas, tab
Article in Spanish | LILACS | ID: lil-342253

ABSTRACT

The present investigation was carried out with the aim to evaluating the presence canine nematoda parasites in the beaches of the city of Corrientes. One hundred and twenty three samples of canine faecal matter and three hundred and twenty four sand samples proceeding from six beach in the city were analysed. The samples were processed individually by the following methods: sedimentation through centrifugation and Willis flotation. Among the faeces samples 59.3 percent resulted to be positive. The species found were Ancylostoma spp. (95.9 percent), Trichuris vulpis (22 percent), Toxocara canis (4.1 percent) and Toxascaris leonina (2.7 percent). Sand contamination was of a 32.7 percent and the observed species were Ancylostoma spp. (100 percent) and T. canis (0.3 percent). The obtained results indicate the need of implementing sanitation environmental measures


Subject(s)
Animals , Dogs , Beach Pollution , Parasitology , Soil Microbiology , Argentina , Dogs , Feces , Nematoda , Sand
12.
Mem Inst Oswaldo Cruz ; 97(1): 43-6, 2002 Jan.
Article in English | MEDLINE | ID: mdl-11992145

ABSTRACT

An entomological and serological survey was performed in three localities of the Department of Concepción, Province of Corrientes, Argentina in 1998 and 1999, to identify triatomines species involved in domestic and wild transmission of Chagas disease. Triatomines were collected by man/hour capture in 32 houses randomly selected and 44 nearby outdoor ecotopes. Trypanosoma cruzi infection in triatomines was assessed by direct microscopic observation (400x) of feces and polymerase chain reaction. Serological techniques used for people were Indirect Hemagglutination Test and Indirect Fluorescent Test. Triatomines were collected in 28.1% of the houses and 31.8% of the wild biotopes. Triatoma infestans (Klug 1834) was exclusively found indoors and T. cruzi infected 60% of them. Triatoma sordida (Stål 1859) was mainly found in extradomestic ecotopes where trypanosome infection rate reached 12.7%. Serological study of 98 local people showed that 29.6% were seroreactive; most of their houses were closed to wild biotopes colonized by T. sordida. Results indicate that there is an active T. infestans mediated transmission of Chagas disease in this zone that yields important human prevalence and that the populations of T. sordida in wild biotopes not only sustain the wild T. cruzi cycle but also represent an actual risk for people living in the area.


Subject(s)
Chagas Disease/transmission , Insect Vectors/parasitology , Triatominae/parasitology , Trypanosoma cruzi/isolation & purification , Adolescent , Adult , Aged , Aged, 80 and over , Animals , Argentina/epidemiology , Chagas Disease/blood , Chagas Disease/epidemiology , Child , Child, Preschool , Female , Housing , Humans , Infant , Infant, Newborn , Male , Middle Aged , Prevalence , Seasons , Trees
13.
Mem. Inst. Oswaldo Cruz ; 97(1): 43-46, Jan. 2002. tab
Article in English | LILACS | ID: lil-306073

ABSTRACT

An entomological and serological survey was performed in three localities of the Department of Concepción, Province of Corrientes, Argentina in 1998 and 1999, to identify triatomines species involved in domestic and wild transmission of Chagas disease. Triatomines were collected by man/hour capture in 32 houses randomly selected and 44 nearby outdoor ecotopes. Trypanosoma cruzi infection in triatomines was assessed by direct microscopic observation (400x) of feces and polymerase chain reaction. Serological techniques used for people were Indirect Hemagglutination Test and Indirect Fluorescent Test. Triatomines were collected in 28.1 percent of the houses and 31.8 percent of the wild biotopes. Triatoma infestans (Klug 1834) was exclusively found indoors and T. cruzi infected 60 percent of them. Triatoma sordida (StÕl 1859) was mainly found in extradomestic ecotopes where trypanosome infection rate reached 12.7 percent. Serological study of 98 local people showed that 29.6 percent were seroreactive; most of their houses were closed to wild biotopes colonized by T. sordida. Results indicate that there is an active T. infestans mediated transmission of Chagas disease in this zone that yields important human prevalence and that the populations of T. sordida in wild biotopes not only sustain the wild T. cruzi cycle but also represent an actual risk for people living in the area


Subject(s)
Humans , Animals , Male , Female , Infant, Newborn , Infant , Child, Preschool , Child , Adolescent , Adult , Middle Aged , Chagas Disease , Insect Vectors , Triatominae , Trypanosoma cruzi , Aged, 80 and over , Argentina , Chagas Disease , Housing , Prevalence , Seasons , Trees
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