154 THE GROUSE IN HEALTH AND IN DISEASE 



in the lung of a specific bacillus of the B. coli group. The 

 disease had, he believed, two classes of victims, one which died 

 rapidly in plump condition and fine plumage, and another 

 which died slowly with emaciation. He puts on one side the 

 whole question of parasitic intestinal worms as having no 

 particular connexion with this epidemic pneumonia, and no 

 casual connexion with the mortality. 



Cobbold differed from Klein in one important respect, 

 viz. : that he distinctly indicates that he did not observe 

 any example of a Grouse dying in good condition and without 

 loss of flesh. 



Neither Klein nor Cobbold suggest that they had any 

 suspicion that they were dealing with two distinct diseases. 



Taking all these facts and opinions into consideration, the 

 Committee at an early period adopted the provisional view 

 that Klein and Cobbold had before them Grouse dead from 

 two distinct diseases (1) plump and well-conditioned birds 

 which had died of an acute infectious pneumonia, i.e., the acute 

 form of Klein's " Grouse Disease " ; and (2) emaciated piners 

 which had died of the results of extreme parasitism, i.e., of 

 Cobbold' s Strongylosis. 



The view that two distinct forms of disease had in the past 

 been confused under one term was supported by the literature 

 on the subject, for all previous writers on Grouse and " Grouse 

 Disease " had referred to a difference in character to be noticed 

 between the disease outbreak of one year and that of another 

 and between the appearance of the victims at one stage and 

 another of the same epidemic. 



The following abstracts serve to illustrate the point : 



William Houstoun of Kintradwell, Brora, says : "At that 

 time it took the tapeworm type, but, when the disease next 

 appeared, it had a different form, and I fear we are as far as 

 ever from a solution of the cause." 



These later cases were presumably cases of Cobbold' s 

 Strongylosis, for the writer proceeds to describe that the 

 intestines were distended " with a yellow feculent matter " 



