His solemn attitude was respected by everyone.

His solemn attitude left a deep impression on everyone.

He has a cold, and there is a possibility that he is holding bacteria in his body.

He became a carrier of bacteria while he had a cold.

I requested a refund because the product was defective.

The product was defective, so I asked the clerk to return the money.

The doctor told him that he might have been infected with leprosy bacteria.

Gonococcus is a bacterium that causes one type of sexually transmitted disease.

Mycobacterium leprae is the bacterium that causes leprosy.

He caught that gold-colored fish.