Cryptosporidiosis among patients with acquired immunodeficiency syndrome (AIDS) in the county of São Paulo, Brazil.

S t o o l s a m p l e s of 157 pa t ien ts w i th A I D S , l i v ing in the coun ty of S ã o P a u l o , were s u b m i t t e d to s e v e r a l t e c h n i q u e s in the s e a r c h for C r y p t o s p o r i d i u m sp . . A m o n g the v a r i o u s t e c h n i q u e s tes ted for s l i de p r e p a r a t i o n (d i rec t s m e a r , s p o n t a n e o u s s e d i m e n ta t ion m e t h o d , a n d formol -e ther c o n c e n t r a t i o n ) , the la t ter , fo rmol -e ther c o n c e n t r a t ion , offered the bes t resu l t s , c l ea r l y o u t d o i n g a l l the o thers . N i n e t e e n s a m p l e s out of 157 p r e p a r e d by th i s t e c h n i q u e , after d y e i n g by the K i n y o u n m e t h o d or by c a r b o l f u c h s i n d i m e t h y l s u l f o x i d e , were found to be pos i t i ve for C r y p t o s p o r i d i u m sp . .