Microbiology If a quellung test was done on the following bacterial isolates, which one would you expect to be positive? A S. pneumoniae B Enterobacter C Haemophilus parainfluenzae D C. diphtheriae 💡 Explanation If a quellung test was done on the following bacterial isolates, which one would you expect to be positive? ✓ Correct Answer: A. S. pneumoniae