Typhoid fever is caused by the bacterium Salmonella Typhi, which is usually spread through contaminated food or water. Once ingested, the bacteria multiply and spread into the bloodstream, leading to a life-threatening infection. People carrying the bacteria can spread it through poor hand hygiene, contaminating food, water, and objects. 

Typhoid fever is a serious and life-threatening illness caused by the bacterium Salmonella Typhi. It can lead to severe complications such as intestinal bleeding, persistent fever, and weakness. The infection is a significant health threat, especially in areas with poor sanitation, and can be particularly dangerous for children. Prompt medical treatment with antibiotics is essential to manage the infection and prevent complications. If left untreated, typhoid fever can be fatal. Therefore, it is crucial to seek medical attention if you experience symptoms of the disease, especially after traveling to regions where typhoid fever is prevalent. 

Typhoid fever is not typically acquired in Canada. It is associated with travel to regions with poor sanitation, such as southern Asia and other developing countries. In Canada, typhoid fever is a nationally notifiable disease in all provinces and territories, meaning that cases are reported to the respective public health authorities. The disease is a serious health threat, especially in areas where it is more common, but it is rare in countries with good water treatment and waste disposal systems, such as Canada

The symptoms of typhoid fever include:

1. High Fever: The fever can start low and then increase, possibly reaching as high as 39.5-40°C
2. Stomach Pain: Abdominal pain is a common symptom of typhoid fever.
3. Diarrhea or Constipation: Severe diarrhea or constipation can occur as the disease progresses.

In addition to these primary symptoms, other common manifestations of typhoid fever can include weakness, headache, loss of appetite, and in some cases, a rash of flat, rose-colored spots.