PARASITOLOGY: Epidemiology quiz

Prevalence rate: Percentage of A. duodenale in the Philippines

This nematode is endemic in Ilocos Norte, Ilocos Sur, Cagayan, La Union, etc.

Also in Thailand, Iran, Japan, Egypt, Korea, Taiwan, and India.

Prevalence rate: Percentage of N. americanus in the Philippines

Other mode of transmission for this nematode are inhalation and retroinfection.

Epidemiology of this nematode includes:

*Geographical distribution - cosmopolitan

*Non-host specific parasite

*Zoonotic (dead-end infection)

Can be obtained due to poor sanitation, poor health education on personal, family, and community hygiene.

It also has a prevalence rate of 80-90% in the Philippines.

The prevalence rate of this nematode in the Philippines are:

97% for Necator americanus,

1% for Ancylostoma duodenale, and

2% for mixed infections.

Prevalence rate: Percentage of school-age infections by Trichuris trichiura

The epidemiology for this nematode includes:

*GD - tropics and subtropics

* Prevalence rate of less than 3% in the Philippines

The prevalence rate of this nematode is higher in females (16%) compared to males (9%).

Also, it can be obtained due to poor personal and family hygiene and overcrowding.