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Made available in DSpace on 2018-05-11T13:46:53Z (GMT). No. of bitstreams: 1 2010 - Renata Kazuko Sakai.pdf: 1267056 bytes, checksum: 688ad78c0490ec2ff8c2c641467143d0 (MD5) Previous issue date: 2010-02-22

Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior, CAPES, Brasil.

Artificial feeding of ticks can be used to study the relationship between vectors and pathogens, biological aspects, to test acaricides and to minimize the use of animals in scientific studies. The objectives of this study were artificially feeding through capillary tubes, females partially engorged of Rhipicephalus sanguineus previously fed on rabbits and dogs. In addition, the gain in weight of females and the influence of the technique in the biological aspects of non-parasitic phase of this species were also analyzed. Partially engorged females of R. sanguineus were obtained from infestation in rabbits and dogs in different intervals of initial weights and fed artificially for 24 hours to assess the best weight gains for the next stage. Female ticks with the best gains in weight were obtained on rabbits and dogs were separated into five groups of homogeneous weight, between 35 and 80mg and 21 to 50mg, respectively. The females were fixed in polystyrene tray with double-sided tape and fed artificially through capillary tubes for 6, 12, 24, 36 and 42 hours with citrated canine blood. After artificial feeding, ticks were again weighed to analyze the weight gain. Subsequently, they were fixed in Petri dishes and incubated at 27?1?C and humidity above 80%, in order to analyze the biological aspects. Control groups were obtained from natural fall of rabbits and dogs and the ticks were kept under the same conditions of temperature and humidity. For the statistical analysis, ANOVA and Tukey test were used for quantitative variables. In addition, the nonparametric Kruskal-Wallis was applied for qualitative variables, both with 5% of significance level. After 36 hours of artificial feeding there were difference statistically significant between groups, in relation to weight gain, for both females obtained from rabbits and dogs. Although the females of R. sanguineus had not been submitted to complete engorgement, the technique of artificial feeding of females derived from rabbits and dogs, no deleterious effects on the biological aspects of non-parasitic stage were observed.

A alimenta??o artificial de carrapatos pode ser utilizada para estudar a rela??o entre vetores e agentes patog?nicos, aspectos biol?gicos, para testar acaricidas e para minimizar a utiliza??o de animais em estudos cient?ficos. Os objetivos deste estudo foram alimentar artificialmente, por meio de tubos capilares, f?meas parcialmente ingurgitadas do carrapato Rhipicephalus sanguineus previamente alimentadas em coelhos e c?es. Al?m disso, foram analisados tamb?m o ganho de peso das f?meas e a influ?ncia da t?cnica nos aspectos biol?gicos da fase n?o parasit?ria desta esp?cie. F?meas parcialmente ingurgitadas de R. sanguineus foram obtidas de infesta??o em coelhos e c?es, em diferentes faixas de pesos iniciais e alimentadas artificialmente por 24 horas, para avaliar os melhores ganhos de peso para a pr?xima etapa. F?meas de carrapatos com os melhores ganhos de peso obtidas de infesta??o em coelhos e c?es, foram separadas em cinco grupos de peso homog?neo, pesando entre 35 a 80 mg e 21 a 50 mg, respectivamente. As f?meas foram fixadas em bandeja de isopor com fita adesiva dupla face e alimentadas artificialmente por meio de tubos capilares por 6, 12, 24, 36 e 42 horas, com sangue canino citratado. Ap?s alimenta??o artificial, os carrapatos foram pesados para avaliar o ganho de peso. Posteriormente, foram fixados em Placas de Petri e mantidos em estufa a 27?1?C e umidade superior a 80%, para avaliar os aspectos biol?gicos. Os grupos controles foram obtidos de queda natural de coelhos e c?es e mantidos nas mesmas condi??es de temperatura e umidade. Para an?lise estat?stica das vari?veis quantitativas foram utilizada an?lise de vari?ncia e teste de Tukey e para as vari?veis qualitativas foram utilizados o teste n?o param?trico Kruskal-Wallis, ambas com n?vel de signific?ncia de 5%. A partir de 36 horas de alimenta??o artificial foi observada diferen?a estat?stica significativa entre os grupos, em rela??o ao ganho de peso, tanto para f?meas obtidas de coelhos e de c?es. Embora as f?meas de R. sanguineus n?o tenham apresentado ingurgitamento total, a t?cnica de alimenta??o artificial de f?meas oriundas de coelhos e de c?es, n?o apresentou efeitos delet?rios sobre os aspectos biol?gicos da fase n?o parasit?ria.