A01.2 Paratyphoid fever B

Name of the Condition

• Paratyphoid fever B (ICD-10 Code: A01.2)

Summary

Paratyphoid fever B is a systemic bacterial infection caused by Salmonella enterica serovar Paratyphi B. 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 B is caused by Salmonella Paratyphi B. 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 tests. Blood or stool cultures may identify Salmonella Paratyphi B. Serological tests, such as the Widal test, can support diagnosis but are less specific. Imaging or other tests may be used to assess complications.

Treatment Options

Treatment typically involves antibiotics, such as fluoroquinolones or cephalosporins, guided by susceptibility testing. Supportive care, including hydration and fever management, is also important. In severe cases, hospitalization may be necessary.

Prognosis and Follow-Up

With prompt treatment, most patients recover fully. Follow-up may include monitoring for relapse or complications. Antibiotic resistance can affect outcomes, so adherence to prescribed therapy is critical.

Complications

Potential complications include intestinal perforation, sepsis, or chronic carriage. Rarely, the infection may spread to bones, joints, or the central nervous system.

Lifestyle & Prevention

• Practice good hand hygiene, especially before eating or preparing food.
• Avoid consuming raw or undercooked foods, particularly in endemic areas.
• Drink bottled or treated water when traveling to high-risk regions.
• Ensure food is stored and cooked safely.

When to Seek Professional Help

Seek medical attention if you experience prolonged fever, severe abdominal pain, or signs of dehydration, especially after travel to endemic areas.

Tips for Medical Coders

Use A01.2 for confirmed cases of paratyphoid fever B. Document the causative organism (Salmonella Paratyphi B) and any associated complications. Ensure clinical correlation with symptoms and diagnostic results.