Abstract:
:Orange B, a pyrazolone dye used to color frankfurter and sausage casings, was given in distilled drinking water to pregnant Osborne-Mendel rats throughout gestation. Assessed on the basis of fluid consumption, the dose levels of 0, 0.05, 0.1, 0.2, and 0.4% corresponded to daily Orange B consumption of 0, 67.5, 129.6, 266.6, and 532.3 mg/kg body weight, respectively. On gestation day 20, the females were euthanized and cesarean sections were performed. Throughout gestation, the treated animals consumed less fluid than did the controls, but the decreases were not dose-related. Feed consumption and maternal weight gain were not affected. No dose-related changes were seen in maternal clinical findings, implantations, fetal viability, or fetal size (weight and length). No compound-related effects were seen in sternebral development. Ossification of the interparietal bones was reduced at some dose levels, but the decreases were considered random because of absence of dose response. No dose-related effect was seen in the incidence of skeletal variations in fetuses or in the number of litters containing fetuses with skeletal variations. Skeletal development, as measured by the average number of ossified vertebrae, was similar in all groups. Soft-tissue development was not affected by dose levels of 0.05 to 0.2%. In animals treated with 0.4% Orange B, significant increases were seen in the incidence of hydroureters (severe and moderate), in the average numbers of fetuses with at least one and at least two soft-tissue variations per litter, and in the percentage of litters containing fetuses with at least two soft-tissue variations.
journal_name
Toxicol Ind Healthjournal_title
Toxicology and industrial healthauthors
Collins TF,Black TN,Ruggles DIdoi
10.1177/074823379501100402subject
Has Abstractpub_date
1995-07-01 00:00:00pages
387-97issue
4eissn
0748-2337issn
1477-0393journal_volume
11pub_type
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