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BS EN 1884:1999
Feather and down. Test methods. Determination of microbiological state (British Standard)
This method describes the dip slide procedures, that uses two types of agar to test the presence of commensal bacteria and coliforms (gram negative). This procedure is suitable when a manufacturer requires a simple test to screen finished filling material hygiene. This method cannot be used to test the presence of sulphito-reducing clostrides (gram positive) and salmonella (gram negative).
British Standards Institution [bsi]