The poor hedgehog took a beating from the media as the poor critter was linked to 20 cases of Salmonellosis.
Hedgehog - http://www.cdc.gov/mmwr/preview/mmwrhtml/mm6204a3.htm?s_cid=mm6204a3_w
Hedgehogs are not the only pets that have been responsible for outbreaks. Many reptiles and amphibians have had past history of being a source of salmonella outbreaks.
Reptiles and amphibians - http://www.cdc.gov/Features/SalmonellaFrogTurtle/
Turtles have caused a number of Salmonella outbreaks over time including last year.
Turtles - http://www.cdc.gov/salmonella/small-turtles-03-12/
Along with turtles, we have frogs, lizards, and snakes.
Frogs - http://www.cdc.gov/salmonella/water-frogs-0411/
Lizards - http://www.cdc.gov/mmwr/preview/mmwrhtml/00017445.htm
Snakes - http://wwwnc.cdc.gov/eid/article/12/2/pdfs/05-0692.pdf
Birds are another group of animals that also get flagged for causing Salmonella outbreaks. Both chicks and ducklings that are given as pets top the list.
Chicks - http://www.cdc.gov/mmwr/preview/mmwrhtml/00046940.htm
Ducklings - http://www.cdc.gov/mmwr/preview/mmwrhtml/00016299.htm
But there is also a link with the exotic birds, such as parrots and macaws. (My Dad had a macaw and that was one messy bird with regard to its watery poop).
Exotic birds - http://vdi.sagepub.com/content/7/2/270.full.pdf
Even feeding birds has its risk. Bird seed has been recalled because of Salmonella contamination.
Bird seed - http://www.fda.gov/Safety/Recalls/ucm325609.htm
And of course, wild birds can carry Salmonella. This is why it is important to maintain clean bird feeders.
Wild birds (including songbirds) - http://vetmed.tamu.edu/common/docs/public/schubot/SalmonellosisinWildBirds.pdf.
Pet rodents have been a issue, but in most cases, the animal will be ill from the Salmonella infection. That is, they are not as good as carriers when compared to reptiles.
Rodent pets such as guinea pigs - http://www.webmd.com/news/20050505/cdc-pet-rodents-can-carry-salmonella
Dogs and cats are generally not an issue unless it comes via their food.
Pet food - http://www.cdc.gov/salmonella/dog-food-05-12/vet-info.html
Regular pets - http://www.cdc.gov/salmonella/typhimurium/salmonella_pets.html
Petting zoos have a history of causing illness via cross contamination of Salmonella and STEC E. coli.
Petting zoos - http://www.cdc.gov/mmwr/preview/mmwrhtml/mm5450a1.htm
Handwashing is among one of the many control steps for petting zoos.
Preventing disease in animal settings - http://www.cdc.gov/mmwr/pdf/rr/rr6004.pdf
Finally, we have this from CDC on reducing risk of Salmonella from animals.
Pets - http://www.cdc.gov/healthypets/diseases/salmonellosis.htm