Revista de otorrinolaringología y cirugía de cabeza y cuello
versión On-line ISSN 0718-4816
SCHMIDT P, Thomas; SEDAGHAT N, Sahba; ROSEL P, Pablo y FIERRO T, Jorge. Nitrate and nitrite in water and saliva of rural population in the Andes foothills of the VIII Region. Rev. Otorrinolaringol. Cir. Cabeza Cuello [online]. 2012, vol.72, n.2, pp. 119-124. ISSN 0718-4816. http://dx.doi.org/10.4067/S0718-48162012000200003.
Introduction: A risk factor for squamous carcinomas of the oropharynx are the nitrosamines, which are derived from salivary nitrate coming from diet and water, especially if the levels are above the allowed levels. Aim: To determine and compare the levels of nitrates and nitrites in drinking water and saliva of people at the foothills of our region and urban population of Concepcion. Material and method: A descriptive cross sectional study. Determination of levels of nitrates and nitrites in drinking water in the Andean foothills and Concepcion and in saliva of people from same locations. Results: We obtained 10 rural water samples and 1 from Concepcion drinking water. Nitrate levels in rural water were 23.29 mg/L and 3.6 mg/L (p <0.05) in urban water. In saliva, the study group (n =15) had 9.58 mg/ml nitrite in saliva, the control group (n =24) 3.8 mg/ml (p <0.05). Conclusion: In rural areas there are significantly higher levels of nitrates in drinking water and saliva. The water levels are higher than national and international standards. Our results confirm high amounts of nitrogen cycle products (nitrites and nitrates) in drinking water and in saliva so it could be considered as carcinogenic elements in oropharyngeal squamous cell carcinomas.
Palabras clave : Nitrites; nitrates; water; saliva.