A01.3 Paratyphoid fever C

Name of the Condition

• Paratyphoid fever C (ICD-10 Code: A01.3)

Summary

Paratyphoid fever C is a systemic bacterial infection caused by Salmonella enterica serovar Paratyphi C. It is characterized by prolonged fever, gastrointestinal symptoms, and systemic involvement. Transmission occurs through ingestion of food or water contaminated with fecal matter from an infected person. The condition is more prevalent in regions with poor sanitation and limited access to clean water.

Causes

Paratyphoid fever C is caused by Salmonella Paratyphi C. Infection occurs when individuals consume food or water contaminated with fecal matter from an infected person. The bacteria invade the intestinal mucosa, enter the bloodstream, and spread to other organs, leading to systemic illness.

Risk Factors

• Consumption of food or water from unsanitary sources
• Travel to regions with endemic paratyphoid fever
• Close contact with an infected individual
• Poor hand hygiene practices
• Lack of access to clean drinking water or proper sewage systems

Symptoms

• Prolonged high fever (often 103–104°F or 39–40°C)
• Headache and body aches
• Weakness and fatigue
• Abdominal pain, constipation, or diarrhea
• Loss of appetite and weight
• Enlarged spleen or liver (hepatosplenomegaly)

Diagnosis

Diagnosis is based on clinical presentation, travel history, and laboratory testing. Blood, stool, or bone marrow cultures may be used to identify the causative organism. Serological tests, such as the Widal test, can also support diagnosis, though they are less specific.

Treatment Options

Treatment typically involves antibiotics, such as fluoroquinolones or cephalosporins, to target the Salmonella bacteria. Supportive care, including hydration and fever management, is also important. In severe cases, hospitalization may be required for intravenous antibiotics and monitoring.

Prognosis and Follow-Up

With prompt treatment, most individuals recover fully. However, complications can occur, particularly if treatment is delayed. Follow-up care may include monitoring for recurrence or long-term effects, especially in cases with severe initial illness.

Complications

• Intestinal perforation or bleeding
• Meningitis or encephalitis
• Sepsis
• Chronic carriage of the bacteria

Lifestyle & Prevention

• Practice good hand hygiene, especially before eating or preparing food.
• Avoid consuming raw or undercooked foods, particularly in regions with poor sanitation.
• Drink bottled or boiled water when traveling to endemic areas.
• Ensure access to clean water and proper sewage systems in high-risk regions.

When to Seek Professional Help

Seek medical attention if you experience prolonged fever, severe abdominal pain, or signs of dehydration, especially after travel to an endemic area. Early diagnosis and treatment are critical to prevent complications.

Tips for Medical Coders

When coding for paratyphoid fever C (A01.3), ensure the documentation specifies the causative organism (Salmonella Paratyphi C) and confirms the clinical presentation aligns with the condition. Verify that the code is used for confirmed cases, as laboratory confirmation may be required for accuracy.