Haemophilus influenzae pharyngitis

*Haemophilus influenzae* pharyngitis is an upper respiratory tract infection characterized by acute inflammation of the pharynx and tonsillar tissues caused by the pleomorphic, Gram-negative bacterium *Haemophilus influenzae* Clinically, it presents with sore throat, pharyngeal erythema, tonsillar exudate, cervical lymphadenopathy, and low-grade to moderate fever

*Haemophilus influenzae* pharyngitis is an upper respiratory tract infection characterized by acute inflammation of the pharynx and tonsillar tissues caused by the pleomorphic, Gram-negative bacterium *Haemophilus influenzae*

While primarily affecting pediatric populations, it can also manifest in adults, typically arising when non-encapsulated (nontypeable) or occasionally encapsulated strains colonize the nasopharynx and breach local mucosal defenses

While primarily affecting pediatric populations, it can also manifest in adults, typically arising when non-encapsulated (nontypeable) or occasionally encapsulated strains colonize the nasopharynx and breach local mucosal defenses

While primarily affecting pediatric populations, it can also manifest in adults, typically arising when non-encapsulated (nontypeable) or occasionally encapsulated strains colonize the nasopharynx and breach local mucosal defenses Pathophysiologically, localized bacterial adherence and endotoxin-mediated tissue irritation drive mucosal swelling and discomfort, carrying a potential risk of contiguous spread to neighboring structures such as the middle ear, sinuses, or lower airway

Clinically, it presents with sore throat, pharyngeal erythema, tonsillar exudate, cervical lymphadenopathy, and low-grade to moderate fever

Pathophysiologically, localized bacterial adherence and endotoxin-mediated tissue irritation drive mucosal swelling and discomfort, carrying a potential risk of contiguous spread to neighboring structures such as the middle ear, sinuses, or lower airway