What disease does paragonimus Westermani cause?
Paragonimiasis is infection with the lung fluke Paragonimus westermani and related species. Humans are infected by eating raw, pickled, or poorly cooked freshwater crustaceans. Most infections are asymptomatic, but pulmonary symptoms may occur, including chronic cough, chest pain, dyspnea, and hemoptysis.
How do you identify paragonimus Westermani?
Paragonimus westermani eggs range from 80-120 µm long by 45-70 µm wide. They are yellow-brown, ovoid or elongate, with a thick shell, and often asymmetrical with one end slightly flattened. At the large end, the operculum is clearly visible.
What is the treatment for paragonimus Westermani?
Treatment. Praziquantel is the drug of choice: adult or pediatric dosage, 25 mg/kg given orally three times per day for 2 consecutive days. For cerebral disease, a short course of corticosteroids may be given with the praziquantel to help reduce the inflammatory response around dying flukes.
What are the possible specimens needed for the diagnosis of P Westermani?
The infection is usually diagnosed by identification of Paragonimus eggs in sputum. The eggs are sometimes found in stool samples (coughed-up eggs are swallowed). A tissue biopsy is sometimes performed to look for eggs in a tissue specimen.
What disease does clonorchis cause?
Clonorchiasis is an infectious disease caused by the Chinese liver fluke (Clonorchis sinensis) and two related species. Clonorchiasis is a known risk factor for the development of cholangiocarcinoma, a neoplasm of the biliary system.
What diseases can flatworms cause in humans?
Paragonimiasis is caused by infection with a flatworm. That’s a parasitic worm also called a fluke or lung fluke because it commonly infects the lungs. Usually, infection comes after eating undercooked crab or crayfish that carry immature flukes. Once swallowed by a person, the worms mature and grow inside the body.
What is the class of paragonimus Westermani?
FlukesParagonimus westermani / Class
One of the three classes within the Platyhelminthes, Trematoda, contains all parasitic organisms. One of these is obviously P. westermani, and another is, ironically enough, the trematode fluke, or Echinostoma revolutum.
What is the definitive host of paragonimus Westermani?
Paragonimus westermani is responsible for most infections, and the definitive host (humans) acquire it by ingesting raw crustaceans infected by larval forms of the parasite (metacercariae).
How do you get rid of lung parasites?
Lung fluke infections are treated with praziquantel, a drug used to eliminate flukes from the body (called an anthelmintic drug). An alternative is triclabendazole. If the brain is infected, corticosteroids may also be given. They help control the inflammation that develops when the drug kills the flukes.
How do you know if you have worms in your lungs?
The first sign of an infection might be seeing a live worm in your vomit or poop. If the larvae have traveled to your lungs, you may get a sickness similar to pneumonia, with: Wheezing. Cough.
What is the typical clinical specimen for laboratory diagnosis of paragonimus Westermani Mcq?
Definitive diagnosis of paragonimiasis requires detection of eggs in sputum, feces, pleural fluid, cerebrospinal fluid (CSF), or pus.
What is the habitat of paragonimus Westermani?
Paragonimus westermani hatches from its egg as a ciliated miracidium in a freshwater aquatic environment and searches for a snail that becomes its first intermediate host. The miracidium burrows into the soft tissues of the snail, loses its cilia, and develops into a sac-like sporocyst.
What is the infection rate of Paragonimus metacercariae?
The average infection rate of Paragonimus metacercariae in crayfish was 88.6%, and mean number of metacercariae per infected crayfish was 30.2. This metacercarial density was the highest in the group of weight in 7.1-9.0 g.
Where is Paragonimus westermani found?
Human paragonimiasis caused by Paragonimus westermaniis locally distributed in the mountainous districts of southern part of Korea. This distribution of P. westermanimainly coincided with that of second intermediate host, freshwater crayfish, which is the most important source of human infections in Korea.
What is the infective stage of metacercariae?
The cercariae invade the second intermediate host, a crustacean such as a crab or crayfish, where they encyst and become metacercariae. This is the infective stage for the mammalian host . Human infection with P. westermani occurs by eating inadequately cooked or pickled crab or crayfish that harbor metacercariae of the parasite .
Does Paragonimus westermanimetacercariae infect freshwater crayfish in South Korea?
During the period from October 1996 to November 1998, the infection status of Paragonimus westermanimetacercariae in freshwater crayfish (Cambaroides similis) collected from Bogildo (islet), Wando-gun, Chollanam-do, which is known for an endemic area of P. westermaniin Korea, were examined.