Final answer:
Escherichia coli (E. coli) is often associated with non-sexually transmitted infections of the reproductive system, while Neisseria gonorrhoeae and Chlamydia trachomatis are mainly responsible for sexually transmitted infections.
Step-by-step explanation:
The bacteria responsible for non-sexually transmitted infections of the reproductive system can be differentiated by their characteristics and the infections they typically cause. Escherichia coli (E. coli) is often associated with urinary tract infections but can also cause reproductive system infections when entering the reproductive tract through means other than sexual transmission. Neisseria gonorrhoeae and Chlamydia trachomatis are primarily responsible for sexually transmitted infections such as gonorrhea and chlamydia, respectively. While Streptococcus pyogenes is not a standard pathogen for the reproductive system, it is well-known for causing strep throat and other infections; it is less commonly associated with reproductive system infections.