Infants and small children are the most likely people to become seriously infected by Salmonella poisoning; healthy adults are among the least likely to be affected. Elderly people and those with immune deficiences, such as HIV patients, are also highly susceptible to becoming seriously ill. Caregivers are also more likely to become infected. For some reason, Germany reports a high rate of Salmonella cases, with approximately 20% of the population being carriers. Germany, whose citizens must report the infection by law, had 50,000 reported cases in 2005 compared to 40,000 in the United States. Salmonella can also be found in animals, particularly in reptiles. Pet tortoises and snakes are among the leading carriers.