Answer:
Figure 2.1 Vibrio cholerae: the bacteria responsible for cholera (0.5–0.8 µm wide and 1.4–2.6 µm long).
Figure 2.2 Entamoeba histolytica: the protozoa that causes amoebic dysentery (up to 60 µm in size).
Figure 2.3 Ascaris lumbricoides or roundworm: these intestinal parasites can be very large – up to 35 cm long.
Figure 2.4 Trichuris trichiura or whipworm: these can reach 4 cm in length.
Table 2.1 lists some of the diseases that are caused by the many different types of pathogens and are linked to poor sanitation and waste management.
