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Weak Chicks

Paratyphoid (PT) is a common disease of chickens. PT is one of several types of diseases caused by infection with Salmonella spp (salmonellosis). It is most commonly caused by S.Typhimurium, but can also be caused by S. Enteritidis, which is also capable of infecting humans and other animals.


PT is transmitted to chickens multiple ways, however it is typically through other apparently healthy or recovered chickens that serve as carriers of the salmonella bacteria.

Incubation period

The incubation period is between 4 to 5 days.

Clinical Signs

Loss of appetite
Increased thirst
Huddling near neat source
Pasty butt
Swollen eye(s)
Droopy wings
Constant chirping noises
Head down with eyes closed
Reduced egg production
Swollen joints
Purplish-colored comb/wattles


  • History
  • Clinical signs
  • Laboratory tests
  • Necropsy


Supportive care: Isolate the bird from the flock and place in a safe, comfortable, warm location (your own chicken "intensive care unit") with easy access to water and food. Limit stress. Call your veterinarian.


  • Avoid allowing chicks to drink from surface water instead of waterers
  • Purchase chicks or eggs from disease-free flocks
  • Minimize contact with wild birds or wild bird droppings
  • Control rodents
  • Provide apple cider vinegar in drinking water

Scientific References

Good Overviews

Age Range

1 to 2 week old chicks are most susceptible

Risk Factors

  • Poor sanitation
  • Chilled brooder
  • Contamination of environment with wild bird or rodent feces
  • Overheating