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Target Organs and Levels of Evidence for TR-368

Toxicology and Carcinogenesis Studies of Nalidixic Acid (CASRN 389-08-2) in F344/N Rats and B6C3F1 Mice (Feed Studies)

Chemical (Study Title)
Peer Review DatePrimary UsesRoute/Exposure LevelsStudy Laboratory
Nalidixic acid
03/13/1989Veterinary use as antibacterial agent for urinary infections. Dosed-Feed
R&M: 0, 2000, 4000 PPM/50 PER GROUP
Physiological Research Laboratory

Levels of Evidence

Male Rats: Clear Evidence
TypeOrgan/Tissue (Lesion)
Neoplastic Lesions
  • Preputial Gland: ADENOMA 2/49 10/49 10/47, PAPILLOMA 1/49 0/49 0/47, OR CARCINOMA 0/49 10/49 12/47 COMBINED 3/49 19/49 20/47
Female Rats: Clear Evidence
TypeOrgan/Tissue (Lesion)
Neoplastic Lesions
  • Clitoral Gland: ADENOMA 4/46 10/46 11/47, PAPILLOMA 0/46 1/46 0/47, OR CARCINOMA 1/46 4/46 5/47 COMBINED 5/46 15/46 16/47
Male Mice: Equivocal Evidence
TypeOrgan/Tissue (Lesion)
Neoplastic Lesions
  • Subcutaneous Tissue: FIBROMA 1/50 3/50 3/50 OR FIBROSARCOMA 4/50 6/50 11/50 COMBINED 5/50 9/50 14/50
Female Mice: No Evidence