Long-term acceptability, durability and bio-efficacy of ZeroVector® durable lining for vector control in Papua New Guinea

Table 1 Durability of insecticide treated plastic sheeting 12- and 36-months post installation

Site	Time (months)	HH no	Installation status no (%)			DL integrity no (%)^a			Fixture integrity no (%)^a
Site	Time (months)	HH no	Intact	Modified	Removed	Holes	Abrasions	Scorched	Intact	Loose^b	Failed^c
Islands village	12	10	10 (100)	0	0	6 (60)	7 (70)	0	5 (50)	4 (40)	1 (10)
Islands village	36	10	4 (40)	0	6 (60)	2 (5)	2 (50)	1 (25)	2 (50)	2 (50)	0
Lowlands village	12	10	8 (80)	1 (10)	1 (10)	4 (45)	6 (67)	0	4 (45)	5 (55)	0
Lowlands village	36	9	3 (33)	1 (11)	5 (56)	4 (100)	3 (75)	0	2 (50)	2 (50)	0
Highlands village	12	8	7 (88)	1 (12)	0	6 (75)	5 (63)	1 (13)	4 (50)	4 (50)	0
Highlands village	36	9	5 (56)	1 (11)	3 (33)	6 (100)	3 (50)	5 (83)	3 (50)	3 (50)	0
Highlands urban	12	9	7 (78)	1 (11)	1(11)	2 (25)	4 (50)	0	6 (75)	2 (25)	0
Highlands urban	36	10	3 (30)	0	7 (70)	1 (33)	1 (33)	0	2 (67)	1 (33)	0
Overall	12	37	32 (86)	3 (8)	2 (5)	18 (51)	22 (63)	1 (3)	19 (54)	15 (43)	1 (3)
Overall	36	38	15 (39)	2 (6)	21 (55)	13 (76)	9 (53)	6 (35)	9 (53)	8 (47)	0

^aExcludes households in which DL was removed
^bDefined as loose or missing fixtures (nails) or slackness in the DL to the degree that the material may be pulled away from the wall by a distance of at least 50 cm
^cDefined as DL no longer affixed to one or more parts of the interior wall due to a failed fixture (as opposed to deliberate removal)

ISSN: 1475-2875