Infestazioni ed infezioni intestinali parassitari nel biennio 2006 -2007 nell'esperienza perugina SUMMARYBetween 2006-07 faecal specimens of 2.132 subjects (1.508 adults and 624 children) were examined for ova & parasites, using direct and after formalin-ethylacetate concentration microscopy, and permanent specific stains. 380 bubjects (17.8 %) were infected: 313 adults (20.8 %) and 67 children (10.7 %). 331 cases (15.5 %) were infected by pathogens, 275 adults (18.2 %) and 56 children (9.0 %). 389 pathogenic or not pathogenic protozoa (18.2 %) and 60 helminths (2.8 %) were identified, more among adults than children (21.0 % vs 11.5 % and 3.2 % vs 1.8 % respectively).Among protozoa, D. fragilis was in all observed in 145 cases (6.8 %), G. duodenalis in 74 cases (3.5 %), other were very rare.Among helminths nematodes were more frequent than trematodes and cestodes, with S. stercoralis (14 cases) and E. vermicularis (13 cases) the most frequent ones. 2.302 subjects (1.505 adults and 797 children) were examined for microbiological tests because affected by acute or prolonged diarrhoea. 82 cases (3.6 %) of protozoal infections were observed, 70 among adults (4.7 %) and 12 among children (1.5 %). D. fragilis was in all prevalent (2.0 %) in respect of G. duodenalis (1.0 %) or other ones (0.6 %). For S. stercoralis specific investigation, modified Baermann method / larvae colture were performed: 20/189 cases (10.6 %) od strongyloidiasis was diagnosed in adults. For E. vermicularis investigation, scotch test was performer: 43/179 cases (24.0%) of enterobiasis was diagnosed. The Authors underline the application of standard operative procedures for O & P with permanent specific stains in subject affected by enterites too, and the analysis of more specimens for each subjects for good diagnostical performances.