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REHS Exam 2026 Study Guide - Updated for Current Exam
NewREHS Exam 2026 Study Guide - Updated for Current Exam 
Which of the following organisms are most resistant to unfavorable environmental conditions and indicate past of possibly intermittent pollution? 
 
a. fecal streptococci 
b. eschericha coli 
c. aerobacter aerogenes 
d. clostridium sporulates - answer - clostridium sporulates 
 
The presence of which of the following is most easily identified by laboratory analysis in water contaminated by feces? 
 
a. shigella dysenteriae 
b. coliform 
c. e...