Part 1. Definition
In this task, you are given a sentence. You are expected to write the name of the organism substances in the body mentioned in the input. Although there might be several correct answers, you need to write one of them.
Part 2. Example
Antisperm antibodies were assessed in the serum samples of 73 men unable to ejaculate naturally and on the sperm cells of 13 of these men.
Answer: serum
Explanation: Serum is a substance of the organism and needs to be tagged.
Part 3. Exercise
 Therefore , when CoNS or Streptococcus spp . were detected by blood culture and SeptiFast analysis , the following criteria were applied to define whether these strains represented a pathogenic infection : ( 1 ) Tests were performed at least twice within 48 hours before and after CoNS were detected by blood culture or SeptiFast analysis ; ( 2 ) CoNS or Streptococcus spp . were detected in two different blood culture tests that were separately performed twice within 48 hours ; and , ( 3 ) CoNS or Streptococcus spp . were detected twice or more in tests that were performed three times [ 11 - 15 ] .
Answer:
blood