1 Serological testing is based on the fact that?     All bacteria have the same antigens

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1 Serological testing is based on the fact that?

		All bacteria have the same antigens.
		Antibodies react specifically with an antigen and different bacterial species express different antigens.
		Only the human body makes antibodies against bacteria.
		Antibodies cause the destruction of antigens.
		Bacteria clump together when mixed with any antibodies and become visible to the naked eye.

2.

Cholera is transmitted through fecal contamination of water. This type of transmission is known as?

		direct contact.
		indirect contact.
		vehicle.
		mechanical vector.
		biological vector.