Ohmmeters work by passing a small current through the component and measuring the voltage produced. If you try this with the component connected into a circuit with a power supply, the most likely result is that the meter will be damaged. Most multimeters have a fuse to help protect against misuse.
Lice itself is a Plural form and the the Singular of it is Louse. Louse ( Insect ) Louse is the common name for members of the order Phthiraptera, which contains nearly 5,000 species of wingless insect. : Wikipedia.
Lice can be detected by characteristic symptoms, including persistent itching and redness, particularly on the scalp, on the back of the head, or in the pubic region (depending on the kind of louse). The eggs, or nits, can be recognized immediately: they are white to gray and are glued firmly to the base of hairs.