Fluoride toxicosis in the form of osteo-dental fluorosis was observed in 443 immature and 2155 mature domestic animals living in areas with high fluoride content (>3.0 ppm) in drinking water of Rajasthan, India. These animals included cattle (Bos taurus), buffaloes (Bubalus bubalis), horse (Equus caballus), donkeys (E. asinus), camels (Camelus dromedarius), sheep (Ovis aries) and goats (Capra hircus). No significant variation in prevalence of osteo-dental fluorosis was found between mature and immature animals. However, mature animals showed relatively higher prevalence (28.4%) of skeletal fluorosis as compared to their counterparts (12.1%). Among these animals, buffaloes showed the highest prevalence of dental (96.8%) and skeletal (66.9%) fluorosis whereas, goats showed the lowest (17.02% and 8.7%) prevalence, respectively. The maximum prevalence and severity of osteo-dental fluorosis was found in grass- eaters or grassers (cattle, buffaloes, horses and donkeys) and minimum in plant- eaters or browsers (camels, sheep and goats).These data were found to be statistically significant. Causes for difference in prevalence and severity of dental and skeletal fluorosis in different species of domestic animals are also discussed in the present paper.

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