Simple one-celled organisms, bacteria are the most plentiful microorganisms as well as the most pathogenic.
That is straight from my college text book
Bacteria
bacteria
They are called "bacterial pathogens".
This pathogen belongs to the Microorganism group of bacteria.
Sometimes bacteria is the pathogen involved.
Fungus
The pathogen for Tetanus is Clostridium Tetani, or C. Tetani Bacteria.
The most common pathogen associated with pelvic inflammatory disease (PID) is Neisseria gonorrhoeae, a sexually transmitted bacteria. Another common causative agent is Chlamydia trachomatis. Other bacteria such as Mycoplasma genitalium and anaerobic bacteria can also be involved in PID.
Pathogen
bacteria
No. The word pathogen means to "make disease". The type of virus that kills only bacteria are called bacteriophages which means "bacteria eaters".
Technically a 'pathogen' IS measels. A pathogen is a fancy name for Bacteria. And a pathogen is a bacteria that IS a certin disease. Hencforth, the answer to your question would be measles IS its own pathogen.