Professional and Linguistic Assessments Board (PLAB) Practice Exam

What is the recommended treatment for threadworms?

1. Mebendazole

2. Albendazole

3. Pyrantel pamoate

4. Metronidazole

The correct answer is: Mebendazole

The recommended treatment for threadworms, also known as pinworms, is mebendazole. This medication is an anthelmintic that effectively targets the specific types of intestinal worms, including Enterobius vermicularis, which is the scientific name for threadworms. Mebendazole works by inhibiting the worms’ ability to absorb glucose, leading to their eventual death. It is typically administered as a single dose and can often be repeated after two weeks if necessary to prevent reinfection, which is common due to the lifecycle of threadworms. This treatment is supported by guidelines from health organizations, making it a standard recommendation for managing threadworm infestations. Other options listed, such as albendazole and pyrantel pamoate, are also anti-parasitic drugs but are not the first line of treatment specifically for threadworms. Metronidazole is an antibiotic primarily used for other types of infections and is not indicated for treating threadworm infections. Therefore, mebendazole is the most appropriate choice for effectively eliminating threadworms in treated individuals.