Self-heating of Hay and Grain in Dewar Flasks and the Development of Farmer's Lung Antigens

In moist hay allowed to self-heat aerobically in Dewax flasks, the pattern of temperature change with time was affected considerably by the type of hay and duration of storage, but there was a relationship between water content and maximum temperature reached, Below 29 yo water con-tent there was little heating or antigen production; in the critical range of 29-34 yo water content, different lots of hay self-heated to different tem-peratures between 33 and 55 " and varied widely in their content of farmer's lung hay antigen complex (FLH), the wetter hays usually producing the more antigen; all samples with 40 % water heated to c. 6.5 ' and produced FLH antigen, associated with the presence of Thermopolysporu polyspora. Pro-gressively less antigen, especially in the lower regions of the flasks, was produced as water content increased from 47 to 68 yo. Moist barley and oat grain also self-heated and produced FLH antigen, usually only in the middle of the grain mass, where T. polysporu was most abundant; the drier upper layers and the lower regions where excess water accumulated were free from the antigen

Farmer's lung disease: the development of antigens in moulding hay

RESP-512

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Yields of the field experiments 1981

9.00SIGLELD:9418.37(1981). / BLDSC - British Library Document Supply CentreGBUnited Kingdo

Yields of the Field Experiments 1987

12.00Available from British Library Document Supply Centre- DSC:9418.37(1987) / BLDSC - British Library Document Supply CentreSIGLEGBUnited Kingdo

Rothamsted conferences on present day problems on crop production.

Mode of access: Internet