Disinfection by hydrogen peroxide nebulization increases susceptibility to avian pathogenic Escherichia coli

BMC Research Notes

Table 1 Mortality and lesion scores of infected/treated chickens

Group	Infection^a	Treatment^b	Total^c	Deaths^d	Sum of lesion scores
Group	Infection^a	Treatment^b	Total^c	Deaths^d	Liver	PRD	TAS-L	TAS-R	LU-L	LU-R	AAS	TOT
1	CH2	2 % H₂O₂	5	0	6	6	6	6	6	6	6	42^A
2	CH2	1 % H₂O₂	5	0	2	2	4	4	2	2	4	20^B
3	CH2	DW	5	0	2	2	2	2	2	2	2	14^B

PRD pericardium, TAS-L thoracic air sac-left, TAS-R thoracic air sac-right, LU-L lung-left, LU-R lung-right, AAS abdominal air sacs, TOT total lesion score and DW = distilled water
^aAerogenic infection with 10 mL 10¹⁰ cfu/ml APEC CH2 at 31 and 32 days of age
^bChickens aerogenically treated with 2 % H₂O₂, 1 % H₂O₂ or distilled water, at 33 days of age i.e. 24 h after the 2nd infection
^cTotal number of chickens per group
^dTotal number of chickens that died or were euthanized during the experiment
Numbers within the same column with different capital letters show significant differences (P ≤ 0.05)

ISSN: 1756-0500