Ascaris lumbricoides infection occurs through

Options

A. sole of uncovered feet
B. contaminated cooked measly pork
C. improperly cooked measly pork
D. from air through inhalation

Explanation

**Step-by-Step Text Solution:**

1. **Understanding the Pathogen**: Ascaris lumbricoides is a parasitic roundworm that causes the disease known as Ascariasis. It belongs to the phylum Aschelminthes, which includes organisms commonly referred to as roundworms due to their cylindrical shape.

2. **Identifying the Source of Infection**: The primary source of infection for Ascaris lumbricoides is contaminated soil that contains the eggs of the parasite. These eggs can survive in the environment for a long time.

3. **Mode of Transmission**: Infection occurs when a person ingests the eggs of Ascaris lumbricoides. This can happen through various means, primarily through contaminated food or water.

4. **Contaminated Food Sources**: Common food sources that can lead to infection include:
- Contaminated raw or undercooked vegetables grown in contaminated soil.
- Contaminated meat, particularly pork, that may contain the eggs of Ascaris.

5. **Evaluating the Options**:
- **Option 1**: Sole of uncovered feet - This is incorrect as the infection is not transmitted through skin contact.
- **Option 2**: Contaminated cooked measly pork - This is a valid option as it can contain the eggs.
- **Option 3**: Improperly cooked measly pork - While this could also be a source, the term "contaminated" is more precise.
- **Option 4**: From air through inhalation - This is incorrect as Ascaris eggs are not airborne.

6. **Conclusion**: Based on the analysis, the best answer is **Option 2: Contaminated cooked measly pork**, as it directly relates to the ingestion of Ascaris eggs.