Cryptosporidium and Giardia taxa in faecal samples from animals in catchments supplying the city of Melbourne with drinking water (2011 to 2015)

Table 3 The total numbers of samples from individual host animals for each catchment, as part of the Melbourne Water Corporation sampling program for waterborne pathogens (July 2011 to November 2015), together with the numbers of animals PCR test-positive for species/genotypes of Giardia (number of test-positive samples)

Catchment	Deer	Rabbit	Kangaroo	Wombat	Total	Prevalence (%)
Cardinia					718	0
Greenvale					638	0
Maroondah				1(AI)	344	0.29
O'Shannassay	2 (AIII)				622	0.32
Silvan			1(AI)		527	0.19
Tarago	2 (AI)				61	3.28
Thomson	1 (AI)	1 (AI)			31	6.45
Upper Yarra	5 (AIII)				714	0.70
Yan Yean					601	0

Sub-assemblage AI is common in wildlife and humans while sub-assemblage AIII, or fallow deer sub-assemblage, has only been found in deer. Overall prevalence for Giardia was 0.3 %. Species commonly reported in humans (46 %) are in bold-type. Bird, Emu, Waterbird, Reptile, Cat, Dog, Fox, Rat, Possum, Wallaby and Unknown groups were all test-negative for Giardia

ISSN: 1756-3305