EMBRYONIC MORTALITY IN SPRAGUE-DAWLEY RATS INDUCED BY SNAKEWEED (GUTIERREZIA MICROCEPHALA)
1993
: Three experiments were conducted to determine the effects of ingested snakeweed foliage (SW) on gestating rat embryos. Mature female Sprague-Dawley rats were paired with male rats and after breeding were randomly allotted to diets containing up to 15% SW. Feeding SW caused a decrease (P .10). Serum clinical profiles reflected undernutrition (decreased triglycerides and cholesterol; P < .01) and mild toxicosis (elevated blood urea nitrogen, creatinine, and bilirubin; P < .01). Because fluid accumulation was noted in the uterus of several rats fed SW, a uterine weight bioassay was conducted. Snakeweed, fed as 10% of the total diet, decreased (P < .01) uterine weight of immature Sprague-Dawley rats. Ingestion of SW during early gestation caused embryonic mortality that could not be attributed to undernutrition or estrogenicity.
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