A18.3

Clinical Causes: Transmission through inhalation of airborne droplets containing *Mycobacterium tuberculosis* Spread from a primary lung infection via the bloodstream or lymphatic system to abdominal organs Ingestion of contaminated food or milk containing TB bacteria (less common in majority of cases) Infection in immunocompromised individuals, making them more susceptible Close contact with someone who has active TB, facilitating transmission

Key Symptoms: Persistent abdominal pain or discomfort Unexplained weight loss and fatigue Fever, often low-grade and persistent Night sweats Loss of appetite Swelling or palpable masses in the abdomen Changes in bowel habits, such as diarrhea or constipation Nausea or vomiting Signs of intestinal obstruction in advanced cases Peritoneal involvement may lead to abdominal distension and tenderness

Diagnosis Path: Diagnosing TB of the intestines, peritoneum, and mesenteric glands involves a combination of clinical evaluation and specialized tests, including: - Physical examination to detect abdominal tenderness, masses, or signs of fluid accumulation - Imaging studies like abdominal X-rays, ultrasound, CT scans to identify abnormalities or fluid - Laboratory tests including sputum analysis if pulmonary TB is suspected - Blood tests such as Interferon-Gamma Release Assays (IGRAs) or Tuberculin Skin Test (TST) - Biopsy of affected tissue or lymph nodes to identify TB bacteria under a microscope - Microbiological cultures from tissue samples to confirm the presence of *Mycobacterium tuberculosis*

Treatment Protocols: Treatment typically involves a prolonged course of multiple antibiotics aimed at combating *Mycobacterium tuberculosis*. The regimen often includes: - An initial intensive phase with drugs such as isoniazid, rifampicin, pyrazinamide, and ethambutol - A continuation phase with isoniazid and rifampicin for several months to ensure complete eradication - Regular monitoring for drug efficacy and potential side effects - Supportive care for symptoms, such as pain management or nutritional support - In some cases, surgical intervention may be necessary to manage complications like bowel obstruction or abscesses Adherence to the full course of therapy is crucial to prevent relapse and development of drug-resistant TB strains.