EXPERIMENT STATION REPORTS. I59 



iiifo.^^ted with (his i>ar;isiU', Jhjit ;ill calves he kepi away from nlWer 

 cattle until 8 or 10 uioulJis old. 



IIEMONCIIUS CONTOUTUS IN LAMP.S ASSOCIATKI) Wmi SVAII'TOMS OF CKNURUS 



CKRERRALIS. 



Oil Jan. (I, ]l)i:>. T accompanied Dr. V to laim of Mr. 



^y. 1». (^i. near Holly (o delerniine if possihlc* cause of serious loss of 

 hnuhs. On this Jarni were about 'A'A) -wesieru lainhs, housed in 2 separate 

 feed lots. These lambs were bought at the Chicago yards and lirought to 

 this farm about Nov. 1st. They were being fed corn silage, hay, and a 

 small quantity of barley (about ^4 ll>- daily per lamb) which was 

 slightly musty. They Avere Avatered from a well about 20 rods from 

 barn which was well protected from drainage. About Kov. 21 some 

 of them began to scour but apparently recovered in a few days. On 

 Jan. 4th lambs began to die with the folloAving symjjtoms: slobbering 

 at mouth, champing jaws, holding head to one side and when forced 

 to move, moved slowly in a circle. There was looseness of bowels. They 

 were sick from a few hours to two or three days before dying. I found 

 several lambs with symptoms as noted above and supposed that some 

 might be infected with Cenurus cerebralis. In three lambs autopsied, 

 the Cenurus cerebralis was not found but the Hemonchus contortus 

 was found in each case, not in large numbers, however, probably due 

 to owuer having administered several doses of oil and turpentine. This 

 farmer has been feeding lambs for several years. Last year lambs 

 were kept in these feed lots until May 10th 'when they were sent to 

 market. These lots were not cleaned out during the summer and Nov. 

 1st the lambs were placed on these dirty lots which were probably 

 infested from sheep fed the past winter. In about three weeks (sufli- 

 cient time f<n' young parasites taken into the stomach to reach ma- 

 turity) some of them began to scour but, evidently due to a small num- 

 ber of parasites, none died. On Jan. 4th, these lambs began to die. 

 This "was sutflcient time (6 weeks) for eggs which were passed from 

 first mature parasites to have reached that stage of development (2-3 

 weeks) which necessarily takes place in manure, water or moist soil 

 before the young parasites can live if taken into stomach of sheep and 

 sufficient time (3 weeks) for these to reach maturity after being taken 

 up by sheep. The remedy suggested w^as to clean out feed lots and 

 haul manure to field. Cover feed lots with quick lime and supply clean 

 bedding. Fast lambs 24 hours, then give each lamb 2 drams gasoline in 

 2 ounces of milk to be followed next day by dose of oil. Repeat if 

 necessary. 



HEMONCHUS CONTORTUS IN CALF COMPLICATED W'lTH GENERALIZED 



VESICULAR EMPHYSEMA. 



On June 18, 1913, I accompanied Dr. S of Clarksville to 



the farm of Mr. H to investigate disease of calves. There 



were 5 calves on this farm from 5 to 8 months old. These vreve running 

 on a pasture through which a small stream ran, on each side of which 

 was more or Jess low, wet, marshy ground, shaded by numerous trees 

 and some underbrush. This pasture has been used for cattle for years. 

 There have been no sheep on this farm for many years but the owner 



