Giardia and Cryptosporidium in canine faecal samples contaminating an urban area.

The aim of the present paper was to continue the study on the presence of parasitic elements in the canine faeces contaminating the urban environment of Naples (southern Italy), focussing on the protozoa Giardia and Cryptosporidium. The total number of sub-areas studied was 143, and the total number of canine faecal samples collected and examined was 415. Each faecal sample was tested for the presence of copro-antigens of Giardia and Cryptosporidium using two commercially available enzyme-linked immunosorbent assays. Giardia antigens were found in 19.6% (28/143) of the sub-areas and in 7.7% (32/415) of the canine faeces collected. Cryptosporidium antigens were found in 4.2% (6/143) of the sub-areas and in 1.7% (7/415) of the canine faeces collected. Co-infection was not found in any sample. The results of the logistic regression models did not show any association between the positivity to Giardia or Cryptosporidium and the independent demographic variables (human population density, male and female population density) taken into consideration. In conclusion, the findings of the present study revealed the presence of Giardia and Cryptosporidium in canine faecal samples from the urban environment of Naples; however, the zoonotic potential of these findings was not assessed due to the lack of information on species/genotypes detected.