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Pharyngitis is a type of upper respiratory tract infection. [7] Most cases are caused by a viral infection. [2] Strep throat, a bacterial infection, is the cause in about 25% of children and 10% of adults. [2] Uncommon causes include other bacteria such as gonococcus, fungi, irritants such as smoke, allergies, and gastroesophageal reflux disease.
Streptococcal pharyngitis, also known as streptococcal sore throat (strep throat), is pharyngitis (an infection of the pharynx, the back of the throat) caused by Streptococcus pyogenes, a gram-positive, group A streptococcus. [9] [10] Common symptoms include fever, sore throat, red tonsils, and enlarged lymph nodes in the front
One of the most common causes is Staphylococcus aureus and often follows a recent viral upper respiratory infection. Bacterial tracheitis is a rare complication of influenza infection. [ 4 ] It is the most serious in young children, possibly because of the relatively small size of the trachea that gets easily blocked by swelling.
The cause of this situation is usually a periapical or periodontal infection of a maxillary posterior tooth, where the inflammatory exudate has eroded through the bone superiorly to drain into the maxillary sinus. [59] An estimated 0.5 to 2.0% of viral rhinosinusitis (VRS) will develop into bacterial infections in adults and 5 to 10% in ...
Tonsillitis is most commonly caused by a viral infection and about 5% to 40% of cases are caused by a bacterial infection. [ 1 ] [ 5 ] [ 6 ] When caused by the bacterium group A streptococcus , it is classed as streptococcal tonsillitis [ 11 ] also referred to as strep throat . [ 12 ]
The infection, in these cases, spreads to the peritonsillar area (peritonsillitis). This region comprises loose connective tissue and is hence susceptible to formation of an abscess. PTA can also occur de novo. Both aerobic and anaerobic bacteria can be causative. Commonly involved aerobic pathogens include Streptococcus, Staphylococcus and ...
Angular cheilitis is thought to be a multifactorial disorder of infectious origin, [10] with many local and systemic predisposing factors. [11] The sores in angular cheilitis are often infected with fungi (yeasts), bacteria, or a combination thereof; [8] this may represent a secondary, opportunistic infection by these pathogens.
Although the disease is easily treatable, in severe cases boils may form inside the nostrils, which can cause cellulitis at the tip of the nose. The condition becomes serious because veins at that region of the face lead to the brain, and if bacteria spreads to the brain via these veins, the person may develop a life-threatening condition called cavernous sinus thrombosis, which is an ...