Yaws is a non-venereal tropical infectious disease caused by the organism Treponema pertenue.[1] This organism is closely related to the. Yaws is an infectious tropical disease caused by the spirochete (spiral shaped) bacterium known as Treponema pertenue. The disease presents in three stages . Yaws is a tropical disease characterized by a primary cutaneous lesion, followed by a granulomatous skin eruption, and sometimes by late destructive lesions of.

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The symptoms may remain dormant for years. Leprosy is a progressive, chronic infectious disease caused by the bacteria, Mycobacterium leprae.

Rare Disease Database

Congenital frambfsia which is considered in this chapter is definitely increasing. The most notable studies in this field included an open-label, small, randomized, controlled trial proving the efficacy of azithromycin when compared to benzathine benzylpenicillin. Treponema pallidum infection in the wild baboons of East Africa: Prognosis with treatment is very good if caught during primary or secondary stages.

Time to onset ranges from 9 to 90 days. Between and overcases were reported to the WHO. The disease challenges the development of entire communities, as adults who become disabled become an economic burden for their environment. The research led by Dr. These spirochetes are fragile outside of their host vectors and are rapidly killed by exposure to heat, oxygen, and drying.

Questions To access free multiple choice questions on this topic, click here. Stage 2 yaws typically follows several weeks or months after the initial symptoms. Yaws shows the existence of a circle between disease and poverty, according to which both components feed each other.

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What is Yaws Disease?

Cutaneous manifestations are the most common and are typically near joints with ulcerative necrotic nodules. According to the official roadmap, elimination should be achieved by Radiologic abnormalities reveal dactylitis and osteoperiostitis.

PMC ] [ PubMed: It is through this they hope to trpoical the disease by the target date ofas stated above. Trop Med Int Health. D ICD – Archived from the original on 11 October Please review our privacy policy. The administration of penicillin requires several components syringes, needles, plastic gloves, water… that make sending the material to remote areas very challenging.

What is Yaws Disease? – End Yaws

Untreated lesions heal spontaneously over 3 to 6 months leaving hyperpigmentation. Single-dose azithromycin versus benzathine benzylpenicillin for treatment of yaws in children in Papua New Guinea: However, no evidence exists of cross-transmission between human beings and primates, but more research is needed to discount the possibility of a yaws animal reservoir in non-human primates. At this stage, swollen glands swollen lymph nodes are not uncommon and the rash may develop a brown crust.

Epidemiology Yaws is found in tropical regions with warm and humid environments. What does this mean? During the secondary stage of yaws, the specific bony disease begins to manifest. This makes them forgetful, and excludes them from a system of research and innovation strongly dominated by the market logic. By the number of cases was The secondary stage occurs months to years later, with typically widespread skin lesions that vary in appearance, including “crab yaws” on the palms of the hands and soles of the feet with desquamation.


The current name is believed to be of Carib origin, “yaya” meaning sore. It means that these pathologies affect people living in rural environments particularly vulnerable in tropical and subtropical countries.

Despite the success of eradication campaigns, there will for years be the challenge of the differential diagnosis, both of the active diseases and their end results. Turn recording back on.

Tropical Medicine Central Resource

From Wikipedia, the free encyclopedia. All subspecies are morphology and serologically indistinguishable. Andrews’ Diseases of the Skin: Chlamydophila Chlamydophila psittaci Psittacosis Chlamydophila pneumoniae. Pinta is a rare infectious disease characterized by skin rash and discoloration. The disease mostly affects children between the age of 2 to 15 who also serve as reservoirs for the spirochete.

Eradication of infectious diseases. Stage 1 yaws typically occurs in early childhood, with tgopical incidence at about six years of age. Unfortunately, due to many factors, some changeable and others not, this is no longer the case and the infections are increasing again just when they were thought to have been almost eliminated.