Typhoid Fever: Causes, Diagnosis & Treatment

Typhoid Fever: Causes, Diagnosis & Treatment

Typhoid fever is a serious bacterial infection caused by Salmonella Typhi. It primarily spreads through contaminated food and water, making it more common in areas with poor sanitation and limited access to clean drinking water. Despite being preventable and treatable, typhoid remains a major health concern in many parts of the world, including South Asia.

Causes of Typhoid Fever
The infection occurs when a person ingests food or water contaminated with Salmonella Typhi. This bacterium is typically shed in the faeces or urine of an infected person.

Main causes and risk factors:

• Contaminated water or food: Drinking unsafe water or eating improperly cooked food.

• Poor hygiene practices: Not washing hands after using the toilet or before handling food.

• Close contact with carriers: Some people become chronic carriers, meaning they continue to spread bacteria even after recovery.

• Travel to high-risk areas: Regions with inadequate sanitation systems.

Once inside the body, the bacteria multiply in the intestines and then spread into the bloodstream, causing systemic infection.

Symptoms of Typhoid Fever
Symptoms usually appear 6–30 days after exposure and develop gradually.

Common symptoms include

• Persistent high fever (often reaching 39–40°C)

• Weakness and fatigue

• Headache

• Abdominal pain

• Loss of appetite

• Constipation or diarrhea

• Dry cough

• Sometimes a rash of flat, rose-colored spots

If untreated, the infection can lead to severe complications such as intestinal bleeding or perforation, which can be life-threatening.

Diagnosis of Typhoid Fever
Accurate diagnosis is important because symptoms can resemble other illnesses, like malaria or viral infections.

Common diagnostic methods

1. Blood Culture (Most reliable early test)

1. A sample of blood is tested to detect Salmonella Typhi. This is the gold standard, especially in the first week of illness.

1. Widal Test

1. A widely used but less specific test that detects antibodies against typhoid bacteria. It can give false positives or negatives, so it is not always reliable on its own.

1. Stool and Urine Culture

1. These tests help detect the bacteria in later stages of the disease.

1. Bone Marrow Culture

1. The most sensitive test, though rarely used due to its invasive nature.

Doctors may also consider medical history, travel exposure, and symptom patterns before confirming the diagnosis.

Treatment of Typhoid Fever
Typhoid fever is treatable with proper medical care. Early treatment significantly reduces the risk of complications.

1. Antibiotics
Antibiotics are the mainstay of treatment. Commonly prescribed medications include:

• Ciprofloxacin

• Azithromycin

• Ceftriaxone

The choice depends on local antibiotic resistance patterns and the severity of infection. It is crucial to complete the full course to prevent relapse or resistance.

2. Supportive Care
In addition to antibiotics, supportive care helps the body recover:

• Hydration: Drink plenty of fluids or use oral rehydration solutions.

• Rest: Essential for recovery.

• Nutrition: Light, easily digestible foods.

In severe cases, hospitalisation may be required for intravenous fluids and close monitoring.

3. Managing Complications
If complications arise, such as intestinal perforation, surgical intervention may be necessary. Early detection and treatment help avoid such outcomes.

Prevention of Typhoid Fever
Prevention is often more effective than treatment.

Key preventive measures

• Drink only boiled or filtered water

• Avoid raw or undercooked food

• Wash your hands regularly with soap

• Maintain proper sanitation and hygiene

• Get vaccinated, especially before travelling to high-risk areas

Vaccines are available but not 100% effective, so hygiene practices remain essential.

Conclusion
Typhoid fever is a potentially serious but preventable and treatable disease caused by Salmonella Typhi. It spreads primarily through contaminated food and water and presents with prolonged fever and digestive symptoms. Early diagnosis using blood culture and prompt treatment with antibiotics such as ciprofloxacin, azithromycin, or ceftriaxone can lead to full recovery. With improved hygiene, safe drinking water, and vaccination, the burden of typhoid fever can be significantly reduced.