Vital Brazil was convinced since his early work at Butantan that envenomations ( poisoning by accidents with venomous animals , such as snakes , scorpions , spiders and batrachia , then the cause of thousands of deaths in Brazil ) could be fought with antisera , i.e. , antibodies specifically produced for venoms which were proteins or long-chain peptides .
PROPN PROPN AUX VERB SCONJ PRON ADJ NOUN ADP PROPN SCONJ NOUN ( NOUN ADP NOUN ADP ADJ NOUN , ADJ ADP NOUN , NOUN , NOUN CCONJ NOUN , ADV DET NOUN ADP NOUN ADP NOUN ADP PROPN ) AUX AUX VERB ADP NOUN , X , VERB ADV VERB ADP NOUN DET VERB NOUN CCONJ NOUN NOUN .