Table 1

Mean concentration* for the main microorganisms isolated in hay samples taken three times from farms at risk (n = 48)

Microorganism	First series				Second series				Third series
Microorganism	Mean (SD)	Range	%†	PS‡	Mean (SD)	Range	%†	PS‡	Mean (SD)	Range	%†	PS‡
*10³ cfu/g.
†Percentage of the total microorganism count.
‡Positive sample; number of samples where the microorganism was present for 48 samples.
Fungi
Absidia corymbifera	4.23 (16.31)	0–110	5.7	44	6.97 (11.91)	0–56	2	39	2.55 (7.51)	0–50	1.1	38
Eurotium amstelodami	17.08 (29.63)	0–140	22.9	16	56.09 (91.53)	0.5–540	15.7	48	20.37 (32.39)	0–151	8.6	46
Wallemia sebi	21.85 (52.63)	0–243	29.1	33	208.24 (660.64)	0–3400	58.4	42	123.20 (311.72)	0–1500	52.1	33
Other fungi	9.23 (23.85)	0–133	12.3		17.86 (41.81)	0–255	5.5		49.14 (132.99)	0–650	20.8
Actinomycetes
Mesophilic Streptomyces	9.99 (181.92)	0–90	13.4	47	51.32 (131.63)	0–650	14.4	47	22.68 (64.61)	0–400	9.6	42
Thermophilic Streptomyces	4.90 (11.49)	0–60	6.6	41	11.53 (25.04)	0–120	3.2	46	4.92 (14.90)	0–81	2.1	37
Saccharomonospora viridis	6.38 (40.41)	0–280	8.5	21	2.41 (61.07)	0–40	0.7	42	4.53 (23.22)	0–160	1.9	34
Saccharopolyspora rectivirgula	0.01 (0.046)	0–0.28	<0.1	3	0.006 (0.047)	0–0.33	<0.1	1	0.063 (0.149)	0–0.6	<0.1	10
Other actinomycetes	0.8 (2.96)	0–17	1.1		2.16 (12.25)	0–85	0.6		0.28 (0.79)	0–5	0.1