Microbiological quality of lettuce (Lactuca sativa) irrigated with wastewater in Addis Ababa, Ethiopia and effect of green salads washing methods

Table 3 Mean helminth eggs contamination levels of irrigation water and irrigated lettuce from ten farming sites in Addis Ababa

Sample Type	Farming Sites
Sample Type	Sore Amba	Lekunda	Peacock-Urael	Peacock-Bole	Kera	Mekanissa	Lafto	Hana-Mariam	Akaki 08	Akaki
Irrigation Water (N = 9 for each farming site)
Ascaris lumbricoides	14	21	19	16	20	7	17	12	18	16
Hookworm	3	3	2	1	3	1	1	2	2	3
Enterobius vermicularis	0	1	2	1	0	0	0	1	1	0
Trichuris trichiura	1	1	1	0	1	0	0	1	0	0
Taenia	0	0	0	0	2	0	1	0	0	0
Heymenolepis nana	1	1	2	0	0	0	0	0	0	0
Strongloyides	0	1	0	0	0	0	1	0	0	1
Total	19	28	26	18	26	8	20	16	22	20
Mean^x	2.1(1.2)^ab	3.1(2.1)^a	2.9(1.8)^a	2.0(1.7)^ab	2.9(1.9)^a	0.9(0.8)^b	2.2(1.6)^ab	1.8(1.6)^ab	2.4(2.2)^ab	2.2(1.7)^ab
Lettuce (N = 15 for each farming site)
Ascaris lumbricoides	20	28	25	17	20	16	42	25	10	31
Hookworm	1	2	2	3	4	2	5	4	2	3
Enterobius vermicularis	0	1	1	1	0	0	3	0	0	2
Trichuris trichiura	0	1	0	0	1	1	3	2	0	1
Taenia	0	0	0	0	1	0	2	0	0	0
Strongloyides	0	0	1	0	0	0	1	0	0	0
Total	21	32	29	21	26	19	56	31	12	37
Mean^y	1.4(1.4)^bc	2.1(2.3)^b	1.9(1.5)^bc	1.4(0.9)^bc	1.7(1.7)^bc	1.3(1.3)^bc	3.7(2.2)^a	2.1(1.8)^bc	0.8(1.0)^c	2.5(2.2)^b

ISSN: 2731-9245