12 



BULLETIN 1012, 17. S. DEPARTMENT OF AGRICULTURE. 



was a very high rate in the acute stages of the. sickness. That this 

 symptom did not appear in the Z. paniculatus cases may be explained 

 by the fact that most of the animals were not very sick; that is, the 

 sickness could not be considered as acute at any time. It did occur, 

 however, in Sheep 569, which was very sick. This animal, too, 

 as well as Sheep 644 and 647, exhibited labored breathing. It may 

 be remarked, in this connection, that under normal conditions there 

 is frequently great variation in the respiration of sheep ; under excite- 

 ment the rate may be temporarily very high. 



Other symptoms. — Some of the animals groaned and gnashed their 

 teeth during the sickness, and Sheep 569 and Sheep 647 went into 

 a condition of coma. Coma is also a frequent symptom in the 

 animals made very sick by Z. gramineus, as shown in Bulletin 125. 



In general, the symptoms were practically identical with those 

 seen in Z. gramineus cases, but less pronounced, because of the 

 smaller toxicity of Z. paniculatus as compared with Z. gramineus. 



DURATION OF SYMPTOMS. 



The following table shows the time that elapsed between the first 

 and last observed symptoms. It should be noted that this probably 

 does not indicate accurately the entire time during which the animals 

 were sick, because in many cases the sickness persisted for a greater 

 or less time after the last note was made. 



Table 2.— Duration of symptoms. 



Animal. 



Method of 

 feeding. 



Time sick. 



Animal . 



Method of 

 feeding. 



Time sick. 



1919. 

 Sheep Nos.: 

 528 

 530... . 



Balling gun... 

 do 



67 hours 5 minutes. ± 



2 hours 33 minutes ± 

 27 hours 40 minutesi 



19 hours 8 minutes. ± 



67 hours 5 minutes. 



20 hours 33 minutes. 

 27 hours 40 minutes. 

 19 hours 8 minutes. 

 24 hours. 



Do. 

 7 hours. 

 36 hours. 



3 hours. 



Do. 

 26 hours. 

 29 hours. 

 96 hours. 

 24 hours. 

 60 hours. 

 72 hours. 



1919 

 Cattle No.: 

 826 



1920. 



Cattle Nos.: 

 874 

 867 

 870 

 S61 



S63 



Fed in hay... 



do 



do 



do 



do 



do 



Do. 



555 



do 





540..... 



do 



1 ' 



1920. 

 Sheep Nos.: 

 528 



do 



One observation. 

 96 hours. 

 60 hours. 



530 



do 



vat ion. 



555 



do... 





540 



do 



1921. 

 Sheep Nos.: 

 582 

 612 



Balling gun.. 

 do 





564 



578 



Fed in hay — 

 do 





583 



590 



Balling gun... 

 do 



. One observation. 

 . 16 hours 18 minutes. 



593 



do 



617 



do 



. 23 h our s 33 mi n u t es . 



599. .. 



do 



628 



do 





602 



do 



629 



do 





605 



do 



do 



644 . 



do 





569 



647 



do 





575 



...do 





609 



do 









583", 



do 





The average in all the force-fed sheep cases, 25 in number, was 36 

 hours and 2\ minutes. The minimum was a single observation in 

 Sheep 582, and the maximum was 4 days in Sheep 569. Sheep 569 

 644, and 647 were very sick, but it is not at all clear that in other 



