Resumos
Camundongos albinos heterogenéticos da linhagem Swiss, foram experimentalmente infectados, via subcutânea, com taquizoítos de uma cepa de Toxoplasma gondii de baixa virulência. Todos morreram durante a fase aguda da infecção, entre 7 e 9 dias após a infecção (DAI). Demonstrou-se, utilizando a bioprova, que 80% dos animais eliminou T. gondii pela urina. Nos rins, observou-se, entre outras alterações, hemorragia intersticial intertubular e presença de hemácias íntegras nos espaços subcapsulares de Bowmann de alguns glomérulos. Discutiu-se sobre os possíveis mecanismos de eliminação de T. gondii na urina dos animais infectados. Analisou-se alguns aspectos relacionados com a eliminação de formas infectantes de T. gondii na urina destes animais e a transmissão da toxoplasmose na natureza
Toxoplasma gondii; Urina; Camundongos; Rim
Toxoplasma gondii tachizoites from an avirulent strain, were used to subcutaneously infect mice (Swiss outbred strain). All died 7 to 9 days after infection (DAI) during acute phase infection. Eighty per cent eliminated T. gondii forms by urine. This was determined through infectivity test in normal mice (bioprove). Interstitial intertubular hemorrhage were the more frequently observed lesion in renal histology. Whole erythrocytes could also be seen in some glomerular Bowmann's sub-capsular space. T. gondii elimination mechanism is discussed, together with the relationship between these observations and natural toxoplasmosis transmission.
ARTIGOS ORIGINAIS
Eliminação de Toxoplasma gondii pela urina de camundongos durante a fase aguda da infecção experimental
Presence of Toxoplasma gondii in the urine of mice experimentally infected
R.J. RochaI; W.L. TafuriII,III; C.A. ChiariII
IDep. de Parasitologia, Inst. de Biologia, UNICAMP, CP 6109, 13081-970, Campinas, SP, Brasil
IIDep. de Parasitologia, Inst. de Ciências Biológicas, UFMG, CP 2436, 31270-901, Belo Horizonte, MG, Brasil
IIIDep. de Ciências Biológicas, FOP, 35400-000, Ouro Preto, MG, Brasil
RESUMO
Camundongos albinos heterogenéticos da linhagem Swiss, foram experimentalmente infectados, via subcutânea, com taquizoítos de uma cepa de Toxoplasma gondii de baixa virulência. Todos morreram durante a fase aguda da infecção, entre 7 e 9 dias após a infecção (DAI). Demonstrou-se, utilizando a bioprova, que 80% dos animais eliminou T. gondii pela urina. Nos rins, observou-se, entre outras alterações, hemorragia intersticial intertubular e presença de hemácias íntegras nos espaços subcapsulares de Bowmann de alguns glomérulos. Discutiu-se sobre os possíveis mecanismos de eliminação de T. gondii na urina dos animais infectados. Analisou-se alguns aspectos relacionados com a eliminação de formas infectantes de T. gondii na urina destes animais e a transmissão da toxoplasmose na natureza.
Unitermos: Toxoplasma gondii; Urina; Camundongos; Rim.
SUMMARY
Toxoplasma gondii tachizoites from an avirulent strain, were used to subcutaneously infect mice (Swiss outbred strain). All died 7 to 9 days after infection (DAI) during acute phase infection. Eighty per cent eliminated T. gondii forms by urine. This was determined through infectivity test in normal mice (bioprove). Interstitial intertubular hemorrhage were the more frequently observed lesion in renal histology. Whole erythrocytes could also be seen in some glomerular Bowmann's sub-capsular space. T. gondii elimination mechanism is discussed, together with the relationship between these observations and natural toxoplasmosis transmission.
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AGRADECIMENTOS
Os autores agradecem a Paul Williams pela revisão do resumo em inglês e aos laboratoristas Rosálida Estevam Nazar e José Luis de Faria, pela ajuda técnica.
Recebido para publicação em 26/12/1991
Aceito para publicação em 3/5/1993
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Datas de Publicação
-
Publicação nesta coleção
21 Jul 2006 -
Data do Fascículo
Ago 1993
Histórico
-
Aceito
03 Maio 1993 -
Recebido
26 Dez 1991