Revista de Saúde Pública
Print version ISSN 0034-8910
FERREIRA, Claúdio Santos and CARVALHO, Maria Esther de. Clearing of fecal smears. Rev. Saúde Pública [online]. 1972, vol.6, n.1, pp. 19-23. ISSN 0034-8910. http://dx.doi.org/10.1590/S0034-89101972000100003.
Under the same conditions of turbidity (transmittance = 50%) the average amounts of feces per unit smear area are increased when diluents with high refractive indices are substituted for water. Such increments, calculated as factors, were on the average: 3.17 for 54% sucrose (n = 1.438); 1.95 for 50% glycerol (n = 1.411); and 1.50 for 30% sucrose (n = 1.385) aqueous solutions. Photoelectric absorptiometry was found adequate for evaluating the efficiency of fecal smear clearing processes.
Keywords : Fecal smears; Clearing; Refractive index; Absorptiometry.