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Title 

Evaluation of developmental toxicity of amitraz in sprague-dawley rats

Authors 

J C KimJ Y ShinY S YangD H ShinC J MoonS H KimS C ParkY B KimHyoung-Chin KimM K Chung

Publisher 

Springer Verlag (Germany)

Issue Date 

2007

Citation 

Archives of Environmental CONTAMINATION and Toxicology, vol. 52, no. 1, pp. 137-144

Keywords 

amitrazdevelopmental biologytoxicityembryotoxicityratratsrat strainrats, sprague-dawleyteratogenstoxicity tests

Abstract 

This study investigated the potential adverse effects of amitraz on the initiation and maintenance of pregnancy in Sprague-Dawley rats as well as its effects on embryo-fetal development after maternal exposure during the entire pregnancy period. Amitraz was administered to pregnant rats by gavage from days 1 to 19 of gestation at dose levels of 0, 3, 10, and 30 mg/kg/day. All dams underwent a caesarean section on day 20 of gestation and their fetuses were examined for any external, visceral, and skeletal abnormalities. At 30 mg/kg, maternal toxicity manifested as an increase in the incidence of abnormal clinical signs and a lower body weight gain and food intake. Developmental toxicity included an increase in the fetal death rate, a decrease in the litter size, and a reduction in the fetal body weight. In addition, there was an increase in the incidence of fetal external, visceral, and skeletal abnormalities. At 10 mg/kg, maternal toxicity observed included a decrease in the body weight gain and a decrease in food intake. In addition, minimal developmental toxicity, including a decrease in the fetal body weight, an increase in the visceral and skeletal aberrations, and a delay in fetal ossification. There were no signs of either maternal toxicity or developmental toxicity at 3 mg/kg. These results show that amitraz administered during the entire pregnancy period in rats is embryotoxic and teratogenic at the maternally toxic dose (i.e., 30 mg/kg/day) and is minimally embryotoxic at a minimally maternally toxic dose (i.e., 10 mg/kg/day). Under these experimental conditions, the no-observed-adverse-effect level of amitraz for both dams and embryo-fetal development is estimated to be 3 mg/kg/day.

ISSN 

0090-4341

Link 

http://dx.doi.org/10.1007/s00244-006-0021-7

Appears in Collections

1. Journal Articles > Journal Articles

Registered Date

2017-04-19


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