edson sospeter
Dec 9, 2023
Discribe characteristics of schistosoma haematobium,mansoni and japonicum???
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Dec 9, 2023
Schistosoma haematobium, mansoni, and japonicum are all species of parasitic flatworms belonging to the genus Schistosoma. They are responsible for causing schistosomiasis, a neglected tropical disease that affects millions of people worldwide. While they share some similarities, there are also distinct characteristics that differentiate them from each other.
1. Schistosoma haematobium:
- Geographical distribution: It is predominantly found in Africa, particularly in regions with stagnant freshwater bodies.
- Intermediate host: Freshwater snails of the Bulinus genus serve as the intermediate host for this species.
- Definitive host: Humans are the definitive host for S. haematobium.
- Disease manifestation: It primarily affects the urinary system, causing urinary schistosomiasis. It can lead to bladder and kidney damage, hematuria (blood in urine), and urinary tract infections.
- Eggs: The eggs of S. haematobium have a characteristic terminal spine, which helps in differentiating it from other species.
2. Schistosoma mansoni:
- Geographical distribution: It is prevalent in sub-Saharan Africa, parts of the Middle East, and South America.
- Intermediate host: Freshwater snails of the Biomphalaria genus serve as the intermediate host for S. mansoni.
- Definitive host: Humans are the definitive host for S. mansoni.
- Disease manifestation: It primarily affects the intestines and liver, causing intestinal schistosomiasis. Symptoms include abdominal pain, diarrhea, hepatomegaly (enlarged liver), and splenomegaly (enlarged spleen).
- Eggs: The eggs of S. mansoni have a lateral spine, which distinguishes them from other species.
3. Schistosoma japonicum:
- Geographical distribution: It is mainly found in East Asia, particularly in China, the Philippines, and Indonesia.
- Intermediate host: Freshwater snails of the Oncomelania genus serve as the intermediate host for S. japonicum.
- Definitive host: Humans and various domestic animals, such as cattle and water buffaloes, act as definitive hosts for S. japonicum.
- Disease manifestation: It primarily affects the intestines and liver, causing intestinal schistosomiasis. The symptoms are similar to those caused by S. mansoni.
- Eggs: The eggs of S. japonicum have a small lateral spine, similar to S. mansoni, but they are smaller in size.
It is important to note that all three species of Schistosoma can cause chronic infections, leading to long-term health complications if left untreated.
1. Schistosoma haematobium:
- Geographical distribution: It is predominantly found in Africa, particularly in regions with stagnant freshwater bodies.
- Intermediate host: Freshwater snails of the Bulinus genus serve as the intermediate host for this species.
- Definitive host: Humans are the definitive host for S. haematobium.
- Disease manifestation: It primarily affects the urinary system, causing urinary schistosomiasis. It can lead to bladder and kidney damage, hematuria (blood in urine), and urinary tract infections.
- Eggs: The eggs of S. haematobium have a characteristic terminal spine, which helps in differentiating it from other species.
2. Schistosoma mansoni:
- Geographical distribution: It is prevalent in sub-Saharan Africa, parts of the Middle East, and South America.
- Intermediate host: Freshwater snails of the Biomphalaria genus serve as the intermediate host for S. mansoni.
- Definitive host: Humans are the definitive host for S. mansoni.
- Disease manifestation: It primarily affects the intestines and liver, causing intestinal schistosomiasis. Symptoms include abdominal pain, diarrhea, hepatomegaly (enlarged liver), and splenomegaly (enlarged spleen).
- Eggs: The eggs of S. mansoni have a lateral spine, which distinguishes them from other species.
3. Schistosoma japonicum:
- Geographical distribution: It is mainly found in East Asia, particularly in China, the Philippines, and Indonesia.
- Intermediate host: Freshwater snails of the Oncomelania genus serve as the intermediate host for S. japonicum.
- Definitive host: Humans and various domestic animals, such as cattle and water buffaloes, act as definitive hosts for S. japonicum.
- Disease manifestation: It primarily affects the intestines and liver, causing intestinal schistosomiasis. The symptoms are similar to those caused by S. mansoni.
- Eggs: The eggs of S. japonicum have a small lateral spine, similar to S. mansoni, but they are smaller in size.
It is important to note that all three species of Schistosoma can cause chronic infections, leading to long-term health complications if left untreated.
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