Examlex
Referral sampling involves identifying a set of respondents who can help a researcher identify additional people to include in a study.
Intrude
To enter without permission or welcome, often causing disruption or disturbance.
Pathogenic
Referring to an organism or substance capable of causing disease or illness in its host.
Harmless Bacteria
Bacteria that do not cause disease or harm to their host, often playing beneficial roles in the environment or human body.
Nutrients
Substances that provide nourishment essential for the growth and maintenance of life.
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