Streptococcal pharyngitis (Strep Throat)
Neisseria gonorrhoeae
Diphtheria (C. diptheriae)
Bacterial Tracheitis
Infectious mononucleosis (EBV)
Patients with<unk>  have a 20% incidence of mononucleosis 
Laryngitis
Acute Bronchitis
Rhinovirus
Coronavirus
Adenovirus
Herpesvirus
Influenza virus
Coxsackie virus
Herpangina
Hand-foot-and-mouth disease
HIV (Acute Retroviral Syndrome)
Patients with<unk>  have a 20% incidence of mononucleosis 
Herpangina
Hand-foot-and-mouth disease
Stevens-Johnson Syndrome
Pemphigus
Angioedema
Deep neck space infection
Retropharyngeal<unk> 
Ludwig's angina
Parapharyngeal space infection<unk>  <unk> 
Epiglottitis
Kawasaki disease
Penetrating injury
Caustic ingestion
Lemierre's syndrome
Peritonsillar cellulitis
Lymphoma
Internal carotid artery aneurysm
Oral Thrush
Parotitis
Post-tonsillectomy hemorrhage
Vincent's angina
Acute necrotizing ulcerative gingivitis
Retropharyngeal<unk> 
Ludwig's angina
Parapharyngeal space infection
Dental fracture
Dental subluxation
Dental avulsion
Bleeding dental socket
Acute alveolar osteitis (dry socket)
Acute necrotizing ulcerative gingivitis (trench mouth)
Dental<unk> 
Periapical<unk> 
Periodontal<unk> 
Ludwig's angina
Pulpitis (dental caries)
Pericoronitis<unk>  <unk> 
Retropharyngeal<unk> 
Vincent's angina - tonsillitis and pharyngitis
Periapical<unk> 
Periodontal<unk> 
Scurvy
Gingival hyperplasia
Phenytoin
Cyclosporine
Nifedipine, Amlodipine
Leukemia
Phenytoin
Cyclosporine
Nifedipine, Amlodipine
Leukemia
Peritonsillar abscess
Streptococcal pharyngitis 
Peritonsillar cellulitis
Neisseria gonorrhoeae
Retropharyngeal abscess
Diphtheria 
Epiglottitis
Bacterial Tracheitis