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Paragonimus sp. parasitic worm
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Paragonimus sp. parasitic worm
Human lung fluke, a parasitic worm. Common in South East Asia, in 1980 there were thought to be 3 million people infected
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Flatworm Fluke Hominini Homo Homo Sapiens Human Infected Lung Parasitic Plathelminthes Platyhelminthes Platyzoa Worm Invertebrata Trematode
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Paragonimus sp., also known as the Human Lung Fluke, is a parasitic trematode worm that poses a significant health threat in various regions of Asia. This flatworm, belonging to the Platyhelminthes and Trematoda classes, is a common parasite among the Hominini, or human lineage of primates. In 1980, an estimated 3 million people were infected with this parasite. The Paragonimus species has a complex life cycle involving two intermediate hosts and one definitive host. The life cycle begins when the infective metacercariae, encysted in the intermediate snail host, are ingested by an unsuspecting human. Once inside the human body, the metacercariae transform into larvae and migrate to the lungs, where they develop into adult worms. The adult worms then produce eggs, which are coughed up and excreted in the feces. These eggs are then ingested by the second intermediate host, a crustacean, which in turn becomes infected and releases the infective metacercariae, starting the cycle anew. Despite the complex life cycle, the Paragonimus sp. is a relatively large worm, measuring up to 30mm in length. This image captures the distinctive features of the adult worm, including its flattened body and the rows of hooks that line its body, which help it attach to the walls of the human lungs. The Paragonimus sp. is a significant public health concern in many parts of Asia, particularly in China, Korea, and the Philippines. Infection can lead to a range of symptoms, including cough, chest pain, and fever. In severe cases, the parasite can cause chronic respiratory disease and even death. Prevention measures include avoiding raw or undercooked crustaceans and snails, proper cooking and handling of food, and good hygiene practices. This photograph of the Paragonimus sp. serves as a reminder of the ongoing challenge posed by parasitic worms to human health, particularly in regions where access to clean water and adequate sanitation remains limited.
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