My attempt at an enhanced localization using translation tools, meaning I also added the occasion word or phrase for flair and to make it sound like a biologist describing an actual organism.
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In nature, there are many parasitic creatures that grow and feed off humans. One of them is the Shrooma, or “Mushroom Woman.” The juvenile body of the Shrooma is known as a "Shroom-Mash." The Shroom-Mash is adapted to mimic common species of mushrooms edible to humans. The Shroom-Mash itself is a delicious edible mushroom, however upon ingestion, its spores immediately activate within the body.
About 15 minutes after ingestion, its host will begin to feel hypersensitivity to the sense of touch. After 30 minutes, the host will feel like someone is tickling their body all over. Some hosts become so sensitive that they can be tickled by a light breeze alone. Often its hosts will experience hallucinations of a large number of people tickling them. As its spores spread through the body, there is nothing the host can do but endure the tickle torment.
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The spores are absorbed and excreted by the body in about 30 minutes, but they remain active for the duration of the Shrooma's life cycle. The tickling sensations then concentrate on the host's genitals, causing the host to masturbate involuntarily due to the intense pleasure. The Shroom-Mash then grows from the host's body with its hyphae beginning to form into long branching strands of mycelium, causing more intense tickling sensations as they grow throughout the body.
During this process, the host typically cannot move but is kept conscious, able to feel each and every tickling and sensations as it branches and grows. This stage last about a day, then the Shroom-Mash begins its to enter its adolescent phase. Once the Shroom-Mash enters this stage, its host's fate has been decided.
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The Shroom-Mash continues to grow, and in a few days its mushrooms cover its host's entire body. At the end of this phase, its mycelium have fully merged with both its host's body, enabling to Shroom-Mash to develop a conscious ego of its own. This state is known as the Shrooma or “Mushroom Woman.”
The host's remains conscious as the Shrooma continues to relentlessly tickle them just shy of going mad, allowing the Shrooma to feed and grow off its host's energy over long periods of time. During this time the host will have to endure a state of non-stop tickle torment. This feeding stage varies according to individuals, but typically takes about two weeks before the Shrooma absorbs enough energy to enter into its final life cycle phase, where upon it releases its host along with dispersing a cloud of spores into the air.