Common roundwarm infecting human beings is

Options

A. ascaris lumbricoides
B. enterbius vermicularis
C. anksylostoma duodenale
D. wuchereria bancrofti

Answer

To solve the question about the common roundworm infecting human beings, we can follow these steps:

### Step 1: Identify the Options
The options provided are:
A. Ascaris Lumbricoides
B. Enterobius Vermicularis
C. Ancylostoma Duodenale
D. Wuchereria Bancrofti

### Step 2: Understand Each Option
- **Ascaris Lumbricoides**: This is a large roundworm known to infect humans, causing a disease called Ascariasis. It is one of the most common roundworm infections worldwide.
- **Enterobius Vermicularis**: This is also known as the pinworm, which primarily infects children and causes enterobiasis, but it is not classified as a roundworm in the same category as Ascaris.
- **Ancylostoma Duodenale**: This is a hookworm that infects humans, but it is not a roundworm in the traditional sense.
- **Wuchereria Bancrofti**: This is a filarial worm responsible for lymphatic filariasis, not a roundworm.

### Step 3: Determine the Most Common Roundworm
From the information gathered, Ascaris Lumbricoides is known to be the most common roundworm that infects humans, with a significant portion of the population estimated to be affected.

### Step 4: Confirm the Mode of Transmission
Ascaris Lumbricoides is transmitted via the fecal-oral route, where eggs are shed in the feces of infected individuals, leading to potential infection if ingested.

### Step 5: Select the Correct Answer
Based on the above analysis, the correct answer to the question "Common roundworm infecting human beings is" is:
**A. Ascaris Lumbricoides**

### Summary
The common roundworm infecting human beings is **Ascaris Lumbricoides**, which is responsible for the disease Ascariasis and is transmitted through the fecal-oral route.

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