Assuntos
Período Pós-Parto , Complicações Infecciosas na Gravidez/prevenção & controle , Vacina contra Rubéola , Rubéola (Sarampo Alemão)/prevenção & controle , Adolescente , Adulto , Formação de Anticorpos , Artrite/etiologia , Costa Rica , Feminino , Febre/etiologia , Seguimentos , Testes de Inibição da Hemaglutinação , Humanos , Artropatias/etiologia , Doenças Linfáticas/etiologia , Menstruação , Pessoa de Meia-Idade , Gravidez , Rubéola (Sarampo Alemão)/imunologia , Vacina contra Rubéola/administração & dosagem , Vacina contra Rubéola/efeitos adversos , Vírus da Rubéola/imunologiaRESUMO
The 96-h LC(50) value of carbaryl was 14.6 microg/mL for the snail Pomacea patula. Organisms were exposed for 72 h to a low sublethal concentration (0.1 of LC(50)) using a semistatic contamination system; bioconcentration and elimination experiments were performed evaluating simultaneously acetylcholinesterase (ACHase) activity. The inhibition of the digestive gland ACHase reached 76% when the carbaryl concentration in tissue was 3.2 microg/g. The increased enzyme inhibition was observed concomitantly with the bioconcentration of carbaryl until 7 h. ACHase inhibition was linearly dependent on the uptake and bioconcentration of carbaryl (r(2)=0.87). The transfer of snails to carbaryl-free water after 72 h of exposure was followed by rapid monophasic elimination with a half-life of 1.0 h. However, ACHase activity levels never returned to control values. These results revealed that the bioconcentration might play a critical role in contributing to the toxicity of carbaryl.