3862
No chemotactic activity for polymorphonuclear leukocytes could be generated in the C5 - deficient serums upon activation of either the classic or alternative pathways , again demonstrating the importance of C5 in human subjects for the production of chemotactic factors .
 C5 - deficient
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Disease 
Text: {0} 
Answer:
 C5 - deficient