Survey on the prevalence of Dermanyssus gallinae in commercial laying farms in Portugal

Figures & data

Figure 1. D. gallinae infestation levels determined at the different sampling sites. © EuroGeographics for the administrative boundaries.

Table 1. Average number of mites per trap, standard deviation (SD), minimum and maximum number of mites, flock size and age of birds in each farm.

Farm	Average no. mites	SD	Min.	Max.	Flock size	Age
Q1	8210.3	9648.7	58	29,026.2	31,000	40
Q2	1316.1	3155.3	0	24,957.2	150,000	70
Q3	4367.4	7540.0	47	28,229.1	19,000	75
Q4	2724.4	2861.4	50	7543.8	25,000	54
Q5	105.7	137.9	23	541	17,800	54
Q6	466.6	586.6	14	1659	20,000	44
Q7	89.3	92.2	7	231	14,000	44
Q8	2.7	2.6	1	8	28,000	63
Q9	52.4	154.5	2	818.1	64,000	48
Q10	10,984.6	23,994.9	0	96,422.4	22,000	55
Q11	81,459.7	87,051.0	592	30,1814.9	48,000	48
Q12	0.0	0.0	0	0	9000	8
Q13	61.4	164.3	0	604.8	13,000	40
Q14	0.1	0.4	0	1	13,000	40
Q15	52.0	193.0	0	822.8	20,000	70
Q16	6664.7	8226.8	246	24,409.9	18,000	94
Q17	466.5	826.1	37	3637.8	18,000	50
Q18	5331.0	3037.9	1670.4	9565.96	17,000	50
Q19	26.7	74.1	0	350	35,000	35
Q20	1506.4	1921.7	0	5871.6	30,000	70
Q21	250.8	997.1	0	4242	30,000	60
Q22	660.9	1291.3	0	4820.64	18,000	65
Q23	9.1	16.5	0	57	21,000	61
Q24	0.9	1.6	0	5	20,000	37