Travel Health – Schistosomiasis

The schistosomes or claret flukes are parasites that accept been about back antiquity. It was declared in writings in the Gynacological Papyrus of Kahun from 1900 BC. Calcified ova accept been begin in Egyptian mummies from 1250 BC. In added words, schistosomes can be associated with abundant civilizations of the past.

Unfortunately they are not just allotment of history, but they are a austere affliction on assertive locations of the world, places area Americans may biking for fun, adventure, aggressive or advance plan today.

Schistosomiasis is an astute or abiding disease, produced by parasites alleged Schistosoma. It is not a individual disease, but a ache circuitous accomplished by several altered breed of schistosomes. The three a lot of important animal breed are Schistosoma mansoni, S. haematobium and S. japonicum.

It is 2nd alone to malaria in agreement of socioeconomic & accessible bloom importance, with 200 actor bodies adulterated in about 75 countries.

It is aswell a “man-made” disease, frequently associated with the development of irrigation and hydroelectric projects (like the Aswan Dam) in developing countries.

Geographically, the 3 breed are begin in Africa (S.mansoni and S. haemotobium), the Middle East (S. haemotobium), the Arabian Peninsula, Brazil, Suriname, Venezuela and the Caribbean (S. mansoni) and China, the Philippines and locations of Indonesia (S. japonicum).

The schistosomes are begin in beginning water. This baptize gets attenuated by adulterated bodies alive in the rice field, fisherman in the basin or accouchement arena who indiscriminately defecate or defecate in the water.

Schistosomes accept a actual complicated activity cycle. The eggs in the carrion or urine bear and the ciliated miracia bath to the specific snail breed area it penetrates and goes through a brace of stages in the snail. After a period, bags of the communicable date (cercariae) are appear and bath about searching for a animal to infect.

The free-swimming cercariae are able of biting the ceaseless derma of the animal host.
In the animal the developed schistosomes eventually end up in the claret argosy of the belly (S. mansoni and S. japonicum) or float (S. haemotobium). Actuality they aftermath eggs which are the could could cause of the disease.

The problems with schistosomiasis are abounding and can include; S. mansoni and S. japonicum: Katayama fever, hepatic perisinusoidal egg granulomas, Symmers’ aqueduct axis periportal fibrosis, aperture hypertension, and casual embolic egg granulomas in academician or analgesic cord. People, abnormally accouchement are characterized with a ample beefy belly due to continued alarmist and spleen.

Pathology of S. haematobium schistosomiasis includes: hematuria (blood in the urine), scarring, calcification, squamous corpuscle carcinoma, and casual embolic egg granulomas in academician or analgesic cord.

How would you be at accident for schistosomiasis? The Centers for Ache Control and Blockage (CDC) accompaniment that acknowledgment to schistosomiasis is a bloom hazard for bodies who biking to disease-endemic areas.

Outbreaks of schistosomiasis accept occurred a part of chance travelers on river trips in Africa, as able-bodied as a part of citizen expatriates, such as Peace Corps volunteers in high-risk areas. Those at greatest accident are travelers who wade, swim, or bath in freshwater in areas area sanitation is poor and the snail hosts are present.

Schistosomiasis can be diagnosed by anecdotic the appropriate eggs in stool samples, biopsy of tissue, abdominal (all) or float (S. haemotobium only). If eggs cannot be begin in stool samples, antibiotic apprehension tests are available.

The biologic of best is praziquantel for infections acquired by all Schistosoma species.

There is not a vaccine or any added prophylaxis accessible for blockage of schistosomiasis. Blockage is by alienated beginning water. According to the CDC, because there is no applied way for the adventurer to analyze infested from noninfested water, travelers should be brash to abstain wading, pond or added acquaintance with freshwater in disease-endemic countries.

Untreated piped baptize advancing anon from canals, lakes, rivers, streams or springs may accommodate cercariae, but heating bathing baptize to 50° C (122° F) for 5 account or clarification baptize with fine-mesh filters can annihilate the accident of infection. If such measures are not feasible, travelers should be brash to acquiesce bathing baptize to angle for 2 days, because cercariae rarely abide communicable best than 24 hours.

There are non-human schistosomes begin actuality in the U.S. These are about acquired by schistosomes of birds or mammals, which can be begin in beginning or alkali water.

They access the animal derma and could could cause a dermatitis bigger accepted as “swimmer’s itch”. This has been appear in lakes of several states including Florida.

Other than the rash, it causes little added ache due to the actuality it cannot complete its activity aeon in humans.

Author: Robert Herriman
Source: ezinearticles.com

I have over 20 years experience in clinical and public health microbiology and infectious diseases. I want to enlighten and inform about infectious diseases that could affect you, rare and common, and what you can do to protect you and your family from these dreaded afflictions. See more of my work at http://www.examiner.com/x-7707-Tampa-Disease-Prevention-Examiner