Question: 

Is it permissible for an Aamil to use live animals such as goats, and chickens as a sacrifice, and thereafter use the blood for treatment of an infected patient? 

Answer: 

The usage of blood in Islaam is totally prohibited in general circumstances, as mentioned in the noble Quraan as well as in the Hadeeth.

حُ رِمَتْ عَلَيْكُمُ الْمَيْتَةُ وَالدَّمُ وَلََْمُ الِْْنْزِيرِ

Translation: prohibited for you are; carrion, blood, the flesh of swine. i