A37.10

Clinical Causes: Transmission through respiratory droplets expelled when an infected person coughs or sneezes. Close contact with an infected individual, especially in crowded settings. Inadequate vaccination history or waning immunity over time. Survival of *Bordetella parapertussis* on surfaces, contaminating hands and objects.

Key Symptoms: Persistent cough that can last for several weeks. Recurrent coughing fits that may cause a high-pitched 'whoop' sound during inhalation, especially in children. Mild fever that may not be prominent. Runny nose or nasal congestion. Mild fatigue and irritability. Vomiting episodes following intense coughing spells. In some cases, especially in adults, symptoms may resemble a common cold, making diagnosis more challenging.

Diagnosis Path: A detailed review of patient history and symptom duration. PCR (Polymerase Chain Reaction) testing of nasal secretions to detect *Bordetella parapertussis* DNA. Bacterial culture to identify the causative organism, though it may take longer and have lower sensitivity. Serological tests to measure antibody levels, especially in later stages.

Treatment Protocols: Prescribed antibiotics such as azithromycin, erythromycin, or clarithromycin to reduce bacterial spread and severity, especially if administered early. Symptomatic relief with measures like staying well-hydrated, resting, and using mild cough suppressants if appropriate. Avoiding irritants like smoke or strong odors that can worsen coughing. Monitoring and managing any complications, although pneumonia and other severe issues are not typical in this form.