Your browser doesn't support javascript.
loading
Show: 20 | 50 | 100
Results 1 - 5 de 5
Filter
1.
Bol. malariol. salud ambient ; 50(1): 29-38, jul. 2010. ilus, tab
Article in Spanish | LILACS | ID: lil-630424

ABSTRACT

Se presentan los resultados de un estudio experimental sobre la transmisión congénita de Trypanosoma cruzi en crías de ratas albinas (Rattus norvegicus), cepa Wistar de segunda generación. El curso de la infección chagásica fue evaluado en las ratas infectadas inicialmente (RII) inyectadas con las formas metacíclicas del parásito, en las crías de la primera (C1ªG) y segunda generación (C2ªG), mediante pruebas de diagnóstico seroparasitológicas y molecular (PCR). En las RII se demostró infección aguda caracterizada por parasitemias patentes entre los 12 y 45 días post-inoculación (pi), e incremento en la respuesta inmune humoral con títulos desde 1:64 y 1:2048; en la fase crónica se evidencio ausencia de parasitemias y mantenimiento de una moderada respuesta humoral en el 100% de las madres. Las C1ªG no presentaron tripomastigotes en la sangre circulante, la prueba de IFI, reveló seropositividad apreciable en el 75% de los sueros. En las C2ªG, los exámenes directos de sangre y el hemocultivo, resultaron negativos; los xenodiagnósticos mostraron un 18,2% de positividad. Las pruebas serológicas empleadas (IFI y ELISA) detectaron un 31,8% y 34,1% anticuerpos circulantes anti-T. cruzi. La PCR aplicada a los sueros, presentó un bajo porcentaje de muestras positivas (6,8%) y en los tejidos (corazón y músculo esquelético) se observó una alta positividad de 54,5% y 45,4%, respectivamente. La presencia de formas flageladas en la sangre, la persistencia de la serología positiva por anticuerpos humorales transferidos vía materna y la permanencia de restos de ADN de T. cruzi en sueros y tejidos en un número importante de crías, confirma la infección congénita a su progenie, en segunda generación. Estos resultados son de gran importancia para una mejor comprensión de la epidemiología de la enfermedad de Chagas congénita


The results of the experimental study concerning the congenital transmission of Trypanosoma cruzi in second generation strain Wistar albino rats are presented. The course of the Chagas infection was evaluated in rats initially infected with the metacyclic forms of the parasite (RII) in first (C1stG) and second (C2ndG) generation offspring using parasitological, serological and molecular (PCR) diagnostic tests. In the RII, an acute infection characterized by patent parasitemias between 12 and 45 days post-inoculation and an increase in the humoral immune response with titers of 1:64 and 1:2048 in the chronic phase demonstrated the absence of parasitemia and maintenance of a moderate humoral response in 100% of the mothers. The C1stG did not show tripomastigotes in the blood circulation and the IIF test showed considerable seropositive in 75% of the sera. In C2ndG, direct blood and hemoculture exams performed were negative, while 18.2% of the xenodiagnosis were positive. The serological tests used (IIF and ELISA) detected 31.8% and 34.1% anti-T. cruzi circulating antibodies. The PCR applied to the serum presented a low percentage of positive (6.8%) samples and in tissues (heart and skeletal muscle) high positives of 54.5% and 45.4% respectively were observed. The presence of flagellated forms in the blood, the persistence of serological positive for humoral antibodies transferred by the mother and the permanence of remaining DNA of the T. cruzi in serum and tissues in a significant number of offspring confirm the congenital infection to their offspring in the second generation. These results are of great importance for the better understanding of the epidemiology of Chagas disease


Subject(s)
Animals , Genetic Diseases, Inborn/mortality , Genetic Diseases, Inborn/blood , Disease Transmission, Infectious/prevention & control
2.
Saudi Medical Journal. 2006; 27 (9): 1291-1295
in English | IMEMR | ID: emr-80917

ABSTRACT

The Saudi Royal Cabinet issued the Saudi Royal Decree No. 3 dated 11-7-1424, establishing the pre-marital examination as a health preventive measure for all Saudis, and requesting the 2 prospective partners [male and female] to carry out a pre-marital examination and present a certificate of pre-marital examination before the wedding. However, the prospective husband and wife are not obliged to abide by the laboratory results if they so wish. This program started officially on the 1st of Muharram, 1425. As a consequence, the community perception and views on the pre-marital examination program as a preventive measure become crucial. Therefore, this study was organized and conducted to reveal the perception of the community regarding the program, through a purpose-made questionnaire that was distributed during symposia and awareness lectures held throughout the Kingdom [Riyadh, Jeddah, Dammam, Al-Khobar, Al-Ahsa, Al-Qassim, and Madinah]. The questionnaire covers the opinions of the participants in various aspects related to genetic diseases including nature of diseases, mode of transmission, affecting factors, complications, management, and prevention. In addition, the questionnaire also covers opinions regarding the pre-marital examination as a preventive measure of blood genetic diseases, and its contribution to the control of these diseases. The questionnaire also covers methods in obtaining information, whether from studies, lectures, information media, and awareness lectures. The results revealed that the majority of the participants [94.3%] were convinced that the pre-marital examination is an effective mean of prevention of blood genetic diseases. The majority [86.9%] of the participants were also convinced that the pre-marital examination should be mandatory. These are indications that the community is aware of the pre-marital examination, and the effectiveness of the awareness program is enriching the knowledge of the citizens


Subject(s)
Humans , Genetic Counseling , Genetic Diseases, Inborn/blood , Genetic Diseases, Inborn/prevention & control , Social Support , Community Health Services/organization & administration , Surveys and Questionnaires , Program Evaluation , Health Education/methods
3.
Indian J Public Health ; 2002 Apr-Jun; 46(2): 61-5
Article in English | IMSEAR | ID: sea-110041

ABSTRACT

In a boarding school of Maharashtra State of India 314 students (Bhil & Pawar) were examined clinically and blood was examined. Anemia was present in 16.2% male & 38.3% female. B (Beta). Thalasemia trait was present in 1.6% male & 2.4% female. Sickle cell trait was present in 21.3% male and 14.4% female and sickle cell disease in 0.6% student. G6PD deficiency was seen in 5.1% male & 4.8% female students.


Subject(s)
Adolescent , Anemia, Sickle Cell/blood , Child , Ethnicity/genetics , Female , Genetic Diseases, Inborn/blood , Hematologic Tests , Hemoglobins/analysis , Humans , India/epidemiology , Male , Physical Examination , Schools , Students/statistics & numerical data , Thalassemia/blood
5.
Invest. clín ; 36(2): 47-60, jun. 1995. tab, ilus
Article in Spanish | LILACS | ID: lil-180842

ABSTRACT

La Unidad de Génetica Médica de la Universidad del Zulia (UGM-LUZ) asesora pacientes con enfermedades parcial o totalmente genéticas, de ambos sexos y de todas las edades, los cuales son referidos de centros públicos y privados por diversas especialidades. En este trabajo se presenta el análisis de 4617 historias de familias referidas para el asesoramiento (AG) a la UGM-LUZ desde enero de 1983 hasta diciembre de 1992; de ellas 54 (1,2 por ciento) fueron AG pre-nupciales, 773 (16,7 por ciento) AG pre-concepciones, 316 (6,8 por ciento) AG pre-natales y 3474 (75,3 por ciento) fueron para Ag por diagnóstico. Se diseño la base de datos utilizando un sistema manejador de base de datos relacional, lo cual permite el fácil acceso con aplicaciones interactivas de tipo Dbase. Se realizaron 5433 diagnósticos, cuyas etiologías por orden de frecuencia fueron: anomalias cromosómicas: 669 (12,32 por ciento), siendo los mas frecuentes los Síndromes de Down y Turner; enfermedades mendelianas monogéneticas: 785 (14,45 por ciento) obteniendo la mayor frecuencia los Síndromes de Marfan y Noonan, la microcefalia, la Osteogénesis Imperfecta, la Distrofia Muscular de Duchenne-Becker y la Incontinencia Pigmenti; enfermedades multifactoriales: 400 (7,36 por ciento) sobresaliendo las anomalías de cierre del tubo neural; y agentes teratógenos: 215 (3,96 por ciento) en especial radiaciones y rubeola. Además se registraron 462 (8,5 por ciento) cuadros probablemente hereditarios, 1139 (20,96 por ciento) no hereditarios, y en 1763 (32,45 por ciento) no se llegó a conclusión diagnóstica. Sería importante obtener cifras de frecuencia similares de otros centros de Genética del país con el fin de caracterizar la patología genética regional y nacional y cuantificar el impacto que ellas causan en la morbilidad, de tal forma que las autoridades de salud reconozcan la necesidad de establecer planes de prevención y atención primaria de familias con riesgo para estas patologías


Subject(s)
Humans , Male , Female , Genetic Diseases, Inborn/blood , Congenital Abnormalities/trends , Genetics, Medical
SELECTION OF CITATIONS
SEARCH DETAIL