Trichina Worm occurs in

Options

A. Man
B. Domesticated animals
C. Rodents
D. All the above

Answer

**Step-by-Step Solution:**

1. **Identify the Organism**: The Trichina worm is scientifically known as Trichinella spiralis.

2. **Habitat of the Worm**: The adult Trichina worm primarily resides in the small intestine of its host, which can include humans, domesticated animals, rodents, and pigs.

3. **Reproductive Characteristics**: The female Trichina worm is viviparous, meaning it gives birth to live young (juveniles) rather than laying eggs. This is an important characteristic that distinguishes it from many other types of worms.

4. **Life Cycle**: When the cysts of the Trichina worm enter the body (for example, in humans), they break open in the intestine, releasing the worms. These worms then feed on the host's digested food and mature in the intestine.

5. **Reproduction**: Once mature, the worms reproduce through copulation, leading to a significant increase in their population within the host.

6. **Associated Disease**: The infestation of Trichina worms leads to a disease known as Trichinellosis, which has symptoms such as diarrhea, nausea, abdominal pain, and muscular cramps.

7. **Conclusion**: Based on the information, the Trichina worm occurs in all of the mentioned hosts: humans, domesticated animals, rodents, and pigs. Therefore, the correct answer to the question is that Trichina worms can infect all of these organisms.

**Final Answer**: Trichina worms occur in humans, domesticated animals, rodents, and pigs.

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