If i thought i saw a threadworm in poop,would it pull out easily with a tweezer or would it just break apart? would there be only one or 2 or would there be more? could you get these worms if no one left home for several months? no kids/pets in home?

Most of these finds are undigested debris from food/salads/etc. Threadworms are rarely found in adults but may be as transient as any germs in the poop. There presence has minimal significance. The situation where treatment/investigation would be needed would be symptomatic anal itching.

If you have not travelled to a poor country, you do not have any worms. To allay your concern, you could ask you doctor to get a stool test for ova and parasites, however, I would not recommend that.