Another, rarer form of salmonella, typhoidal salmonella (typhoid fever), is carried only by humans and is usually transmitted through direct contact with the fecal matter of an infected person. This kind of salmonella infection can lead to high fever, abdominal pain, headache, malaise, lethargy, skin rash, constipation, and delirium. It occurs primarily in developing countries without appropriate systems for handling human waste.