302 
Cure of Surra 
Pony B 7. 540 lbs. 
1st day 600 c.c. ars. ac. sol. 
2nd ,, 60 c.c. atoxyl. 
3rd „ 1*5 gms. ars. ac. 
Four days interval. 
8th day 800 c.c. ars. ac. sol. 
9th ,, 60 c.c. atoxyl. 
10th ,, 2 gms. ars. ac. 
Four days interval. 
15th day 1000 c.c. ars. ac. sol. 
16th ,, 75 c.c. atoxyl. 
17th ,, 2-5 gms. ars. ac. 
Eight days interval. 
26th day 800 c.c. ars. ac. sol. 
On the 26th day, about two hours after the dose of ars. ac. solution 
had been given, the pony had a severe attack of tympanitic colic and 
died in a few hours. 
Pony B 8. 550 lbs. 
1st day 600 c.c. ars. ac. sol. 
2nd ,, 60 c.c. atoxyl. 
3rd ,, 1'5 gms. ars. ac. 
Four days interval. 
8th day 800 c.c. ars. ac. sol. 
9th day 60 c.c. atoxyl. 
10th ,, 2 gms. ars. ac. 
Four days interval. 
15th day 800 C.c. ars. ac. sol. 
About two hours after the dose of ars. ac. solution the pony had 
a severe attack of tympanitic colic and died in a few hours. 
The cause of these two fatalities is not known. The dose of arsenic 
was not sufficient to cause poisoning, nor did the symptoms or post 
mortem appearances support this view. The arsenic solution had been 
made in a large quantity 10,000 c.c. It was several days old. Five 
other ponies which received relatively small doses of the same brew of 
arsenic solution showed similar symptoms of tympanitis but recovered 
on being treated by hypodermic injections of strychnia. The two cases 
which succumbed received the usual treatment with stimulants and 
carminatives which was of no avail. 
Rules for treatment of Surra. 
The following instructions were issued in September 1909 as a 
guide to veterinary officers in India who proposed to apply the arsenic 
treatment to Surra cases in their district. As it was pointed out that 
the preparations and transport of arsenic solutions would be a difficulty 
in district work, the method of treatment with atoxyl and arsenic in 
bolus was advised. 
Rules for Surra Treatment. 
I. Solutions of Atoxyl should be freshly prepared before use in 
distilled or boiled water. The water should be allowed to cool before 
the solution is made. Carbolic Acid should not be used for sterilizing 
as it decomposes the Atoxyl. The solution is to be injected subcu¬ 
taneously with the usual aseptic precautions. 
