Take another look at the sentence:
Leroy has read travel books about every exotic country imaginable but refuses to ever visit in person. He worries that he might be stinged by a poisonous spider, bitten by a deadly snake, or convinced to order pickled monkey brains at a restaurant because he doesn't understand the language.
|Verb||Simple Present||Simple Past||Past Participle|
Bitten, the verb you chose, is perfectly correct. Before you continue, review the rules for irregular verbs.