How to Use "commensal" with Example Sentences

1. Staphylococcus epidermidis is a commensal bacterium of the human skin .
2. Objective to study the anticoagulant rodenticide resistance in commensal rodents .
3. One commensal bacterial molecule - all we need for health ?
4. Why don 't we have commensal bacteria in our guts to do it ?
5. Digestion in the pitcher is aided , especially during the second year , by the commensal organisms that live in the pitchers .