Rhinoscleroma is a chronic granulomatous condition of the nose and other structures of the upper respiratory tract. Rhinoscleroma is the result of infection with Klebsiella rhinosclerommatis microorganisms. The Polish physician Johann von Mikulich in Wroclaw described the histological signs in 187; Von Frisch identified the organism in 1883. In 1934, Belinov proposed using the term respiratory scleromas, because the pathological process in rhinosclerosis can affect not only the upper respiratory tract, but also the lower ones. In 1962, Steffen and Smith demonstrated that the disease conforms to Koch's postulates and that he is an etiological factor in inflammatory changes typical of scleroma. The occurrence of a familial disease suggests that the genetic control of the host's response to bacteria may be an important factor in endemic areas.
Pathophysiology
The disease probably begins in areas of the epithelial junction, such as the vestibule of the nose, the suborbital region of the larynx, or the area between the nasopharynx and oropharynx. There is a violation of cellular immunity in patients with rhinoscleroma; however, their humoral immunity persists. The ratio of CD4/CD8 cells in the lesion changes with a decrease in CD4 lymphocyte levels; this change may induce a decreased T cell response. Macrophages are not fully activated. The mucopolysaccharides in the bacterial capsule probably contribute to the inhibition of phagocytosis. Otherwise, patients are immunocompetent in all respects, except for ineffective phagocytosis of the body by Mikulich cells. Rhinoscleroma usually affects the nasal cavity, but lesions associated with the disease can also affect the larynx, nasopharynx, and oral cavity.
Epidemiology
The disease is considered endemic to the regions of Africa (Egypt, tropical areas), Southeast Asia, Mexico, Central and Southern parts of America and Central and Eastern Europe, but it is not often observed in the United States. Rhinoscleroma is also reported to be rare in Saudi Arabia and Bahrain. Five percent of all cases occur in Africa. However, with current migration trends, the incidence may be on the rise. Rare sporadic cases occur in the United States, usually in immigrant populations coming from countries where the disease is endemic. The 1xBet welcome bonus for Bangladeshi players is an enticing offer, providing up to 195,000 BDT and 150 Free Spins for casino games. The promo code for 1xbet to unlock this bonus and dive into a wide array of popular online slots, poker, and table games at 1xBet Casino BD. Their extensive collection includes top-tier slots from renowned developers. This bonus, including 150 free spins, is a fantastic way to start exploring. Additionally, 1xBet offers various promotions and VIP programs, enhancing the gaming experience.