Diphtheria Diagnosis and Management

Clinical Presentation and Diagnosis

The Centers for Disease Control and Prevention suggests that a "bull neck" appearance, airway compromise, and pharyngeal findings with bleeding are pathognomonic for diphtheria, representing massive cervical lymphadenopathy and soft tissue edema from toxin-mediated vascular damage 1
The absence of childhood immunization is a critical epidemiological factor, as diphtheria is vaccine-preventable and cases occur almost exclusively in unimmunized or inadequately immunized individuals 2, 3
The American Academy of Pediatrics recommends considering diphtheria in unimmunized patients with severe pharyngitis, even in industrialized countries where it is rare 2

The clinical presentation of diphtheria can be distinguished from streptococcal pharyngitis by the presence of a "bull neck", inspiratory stridor, and bleeding with swabbing, which are not typical features of strep throat 1, 4
The Infectious Diseases Society of America notes that pertussis presents with paroxysmal cough, post-tussive vomiting, and inspiratory whoop, which is inconsistent with the clinical picture of diphtheria 2

The Centers for Disease Control and Prevention recommends urgent administration of diphtheria antitoxin (DAT) without waiting for laboratory confirmation, as the degree of protection is inversely proportional to illness duration before administration 1
The American College of Emergency Physicians suggests that airway management, including intubation or tracheostomy, may be necessary in patients with inspiratory stridor indicating impending complete airway obstruction 1
The World Health Organization recommends administering azithromycin or penicillin alongside antitoxin, as well as implementing isolation precautions to prevent human-to-human transmission 1, 2, 3