Malaria Parasites Detected at Study Site

90

80

70

60

50

40

30

20

10

0

80.0%

81.25%

64.8%

20.67%

14.53%

20.0%

18.75%

0.0%

0.0%

Real-Time PCR

P. falciparum

RDT

P. vivax

KHV

PH

Figure 3.1. Structure of malaria parasite species detected by testing techniques

The malaria parasite species caused by P. falciparum accounted for the highest proportion of the total malaria parasites detected, in which P. falciparum detected by blood smear microscopy accounted for 81.25%, RDT accounted for 80.0% and Real-Time PCR technique accounted for 64.80%.

Table 3.4. Rate of malaria parasite infection detected at the study site

Technical review

test

* : Fisher exact correction

The rate of malaria parasite infection detected by Real-Time PCR technique in Dak O commune and Bu Gia Map commune has a difference of p<0.05. However, the rate of malaria parasite detected

By RDT technique and blood smear microscopy in the two communes, there was no difference p>0.05.

3.1.3. Malaria parasite prevalence distribution according to characteristics of the study subjects

12.2

12.1

12

11.9

11.8

11.7

11.6

11.5

12.13%

11.73%

Male

Female

Figure 3.2. Parasite prevalence distribution by sex of study subjects. Parasite prevalence at the study site using real-time PCR technique.

Men account for 12.13%, equivalent to women account for 11.73%.

18.0%

20

5.20%

10

0.66%

0

<5 years old

5-15 years old

>15 years old

Figure 3.3. Rate of parasitic infection by age group of study subjects. The rate of parasitic infection was highest in subjects >15 years old 18.0%, lowest

The highest infection rate was in the <5 years old group at 0.66% and in the 5-15 years old group at 5.20%.

9.87%

10.13%

12

10

8

6

4

2

0

2.53%

1.33%

Terrible

Stieng

Tay, Nung, M'Nong

Other

Figure 3.4. Parasitic infection rates by ethnicity of study subjects

1211.33%

10

8

6

4.14%

4.40%

4

2

0

Farming Forestry Trading Housework Student Other

The Stieng ethnic group has a malaria parasite infection rate of 10.13%, higher than the Kinh ethnic group at 9.87% and other ethnic groups at 1.33%.

Figure 3.5. Rate of parasite infection according to occupation of the study subjects. Rate of parasite infection in subjects working in fields and forests is 14.13%, students and

Housewives account for 8.54%, the lowest are traders and housewives account for 1.20%.

3.1.4. Describe some related epidemiological factors and history of malaria

Table 3.5. Some epidemiological factors related to malaria

Accommodation within 14 days

Crossing the border

Sleep at home with mosquito net at night

Are not

No 665 88.67

There are 743 99.07

No 07 0.93

Sleeping in the forest

Sleeping while working in the fields

Epidemiological factors related to malaria infection of subjects at the research site in the 14 days before the survey, when interviewed, the majority of the research subjects were in the fields (54.13%), at home (17.20%), in the forest (5.07%) and elsewhere (23.60%). Subjects who have time to stay, live and work in the locality

≥1 year accounted for 98.27% and had border exchanges between Vietnam and Cambodia accounted for 11.33%. The rate of regularly sleeping under mosquito nets at night accounted for 99.07%, and sleeping over when

Going to the forest accounted for 8.93%, sleeping in the fields accounted for 20.53% and having a history of malaria accounted for 28.0%.

21.52%

70

22.71%

60

28.57%

21.81%

20.74%

50

40

47.76%

30

32.94%

31.82%

31.90%

20

23.82%

10

0

Border exchange

Sleep under mosquito net at home

Sleeping in the woods

Sleeping in the field

Ever had malaria

Yes No

Figure 3.6. Malaria parasite infection rate distributed by epidemiological factors

The rate of malaria parasite infection in subjects with border exchanges was 32.94%, higher than that of subjects without exchanges at 22.71%, and the rate of malaria parasite infection in subjects who slept in the forest was 47.76%, while those who did not sleep in the forest had an infection rate of 21.52%. The rate of malaria parasite infection in subjects who slept in the fields was 31.82%, while those who did not sleep in the fields had an infection rate of 21.81%. On the other hand, subjects with a history of malaria had a rate of malaria parasite infection of 30.91%, and subjects who had never had malaria had an infection rate of 20.74%. In subjects who regularly slept under mosquito nets at home at night at the research site, the rate of malaria parasite infection in these subjects was 23.82%, while those who did not sleep under mosquito nets or did not regularly had an infection rate of 28.57%.

3.1.5. Describe some factors related to the rate of malaria parasite infection at the study site

Table 3.6. Description of some factors related to malaria parasite infection rate with general characteristics of the study subjects

Parasitic infection (n= 750)

The rate of malaria parasite infection in the Tay, Nung, and Mo Nong ethnic groups was 2.02 times higher than that of the Kinh ethnic group, and the rate of malaria parasite infection in those with other occupations was only 0.47 times higher than that of the farming group, the difference was statistically significant p<0.05.

The rate of KSTSR infection between gender and age groups in the study was not statistically different, p>0.05.