Fig. 2

Recovery of Cryptosporidium and Giardia according to the combination of techniques applied. Condition 1 consists of the complete protocol according to USEPA Method 1623.1. Condition 2 is the combination of the elution according to the USEPA with the concentration by microfiltration. Condition 3 is the alternative elution protocol combined with the concentration by IMS. Condition 4 is the alternative elution protocol paired with the concentration by microfiltration. The symbol ■ states that the averages are statistically significantly different with a threshold of 5%. The symbol □ indicates that the averages are non-statistically significantly different with a threshold of 5%. The symbol ○ means that the medians are non-statistically significantly different with a threshold of 5%