Cortés-Jiménez M, Nogueda TB, Alejandre AR

Language: English/Spanish
References: 16
Page: 61-63
PDF size: 245.37 Kb.

Text Extraction

In order to evaluate the capacity of Ornithonyssus bacoti to transmit. Trypanosoma cruzi, different instars of O. bacoti were analyzed. They were collected from mice which presented high T. cruzi parasitaemias. Groups of 10 acari were ground at different times from t=9h to t=24h. Att=0, bloodstream tripomastigote forms were mainly observed. In the period from 10h to 24h, epimastigote forms were observed and after this time the spheromastigote forms were the most abundant. The macerated material obtained from t=0 to 5=24h, was inoculated to normal mice orally and the infection with T. cruzi was achieved. Results show that juvenile and adult instars of O. bacoti are susceptible to T. cruzi, and it is possible to conclude therefore, that they play a vector role during a short period.

REFERENCES

1. Brener, Z.: Biology of Trypanosoma cruzi. Ann. Rev. Microbiol., 87: 347-382 (1973).

2. Brumpt, E.: Le Trypanosoma cruzi évolue chez Conorrhinus magistus, Cimex lectularius, Cimex boueti et Ornithodorus moubata. Cycle évolutif de ce parasite. Bull. Soc. Pathol. Exot., 5: 360-367 (1912).

3. Brumpt, E.: Immunité partielle dans les infections a Trypanosoma cruzi. Transmission de ce trypanosome par Cimex rotundatus. Róle régulateur des hótes intermédiaires. Passage a travers la peau. Bull. Soc. Pathol. Exot., 6: 172-176 (1913).

4. Gallardo, Z.M. y Yépez, M.S.: Probable acción vectora de blatarios contaminados con el Trypanosoma cruzi Chagas, 1909 mediante triatominofagia. Acta Biol. Venez., 5: 256-266 (1967).

5. Hoare, A.C. and Wallace, G.F.: Developmental stages of trypanosomatid flagellates: A new terminology. Nature, 12: 1385-1386 (1966).

6. Lapierre, J.: Evolution et conservation de Trypanosoma cruzi chez Ornithodorus moubata. Ann. Parasitol., 47: 5-15 (1972).

7. Mazzotti, L. y Osorio, M.T.: Experimentos de transmisión de T. cruzi en cuatro especies de Ornithodoros. Rev. Inst. Salub. Enferm. Trop., 4: 163-165 (1943).

8. Neiva, A.: Transmissao do Trypanosoma cruzi pelo Rhipicephalus sanguineus. Bras. Med., 27: 498 (1913).

9. Organización Mundial de Salud/Organización Panamericana de Salud: Tripanosomiasis americana. Bol. Of. Sanit. Panam., 77: 141-158 (1974).

10. Pinto, D.: Doenca de Chagas Clínica e Terapéutica. Ministério da Saúde, Sao Paulo, Brazil, 1990.

11. Rodhain, J. et Brutsaert, P.: L´évolution des Trypanosoma lewisi et Trypanosoma cruzi chez Melophagus ovinus. CRC Biol., 118: 1228-1231 (1985).

12. Urdaneta-Morales, S. y Alvarado de, E.: El ciclo evolutivo de Trypanosoma (S.) cruzi Chagas, 1909 en Aëdes aegypti. Acta Biol. Venez., 9: 17-36 (1975).

13. Uribe, C.: On the biology and life history of Rhodnius prolixus Stahl. J. Parasitol., 13: 129-136 (1926).

14. Velasco, O.: La Enfermedad de Chagas. Una Revisión Histórica Sucinta y Parcial de lo que Ocurre en México y en el Mundo. Publicaión técnica del Instituto Nacional de Diagnóstico y Referencia Epidemiológica #8. INDRE, México, D.F., 1991.

15. Vergani, F.: Estudio sobre la vección de trypanosomas por medio de dípteros no vulnerantes. Bol. Inst. Invest. Vet., 4: 657-672 (1952).

16. World Health Organization: American tripanosomiasis. Division of Control of Tropical Diseases (CTD). UNDP/World Bank/WHO Special Programme for Research and Training in Tropical Diseases (TDR). WHO, 1: 12-13 (1990).