Effects of a malaria elimination program: a retrospective study of 623 cases from 2008 to 2013 in a Chinese county hospital near the China – Myanmar border

Figures & data

Figure 1 Map of the Myanmar–China border area near Tengchong county.

Figure 2 Distribution of all the hospitalized malaria cases in Tengchong county by age and gender, 2008–2013.

Table 1 Characteristics of all hospitalized malaria cases during the period 2008 to 2013, Tengchong county

Patient characteristic		Total (n = 623)	Total (%)
Age, Median (IQR)		24(32–40)
Range		0–67
Gender	Male	571	91.7
Nationality	China	598	96.0
	Myanmar	25	4.0
Ethnicity	Han	592	95.0
	Ethnic minority	31	5.0
Region visited	Myanmar	538	86.4
	Laos	7	1.1
	Congo	1	0.2
	Domestic epidemic area	21	3.4
	No travel history	56	9.0
Purpose of travel	Migrant workers	399	64.0
	Chinese citizen living abroad	30	4.8
	Business	10	1.6
	Visiting friends and relatives	4	0.6
	Sightseeing	1	0.2
	Other purpose	130	21.7
	Autochthonous cases	44	7.1
Living environment	Forest	309	49.6
	Countryside	136	21.8
	City	68	10.9
	Unknown	110	17.7
HIV	Positive	6	1.0
Chemoprophylaxis	Yes	8	1.3
	No or Unknown	615	98.7
Diagnosis	Plasmodium falciparum	218	35.0
	Plasmodium vivax	336	53.9
	Mixed	14	2.3
	Unidentified	55	8.8
Types	Severe	151	24.2
	Uncomplicated	472	75.8
Outcome	Death	3	0.5
	Recovery	620	99.5

Figure 3 Number of hospitalized malaria cases in Tengchong by month and average monthly rainfall in Tengchong, 2008–2013.

Figure 4 All hospitalized malaria cases in Tengchong county, 2008–2013, and the proportion of patients returning from the Myitsone area.

Figure 5 (A) Distribution of P. vivax and P. falciparum malaria cases by year. (B) Composition of malaria species by year, 2008–2013.

Figure 6 Proportions of related characteristics in all the hospitalized malaria cases in Tengchong county, 2008–2013.

Table 2 Characteristics of patients between 2008–2010 and 2011–2013

Patient characteristics		2008–2010 n = 411	2011–2013 n = 212	P Value
Age, Median (IQR)		31(24–40)	33(25–40)	0.498
Range		0–67	4–56
Gender	Male	375(91)	196(92)	0.604
Nationality	China	398(97)	200(94)	0.132
	Myanmar	13(3)	12(6)
Ethnicity	Han	395(96)	197(93)	0.083
	Ethnic minority	16(4)	15(7)
Region travelled	Myanmar	356(87)	182(86)	0.004
	Laos	1(0)	6(3)
	Congo	1(0)	0(0)
	Domestic epidemic area	19(5)	2(1)
	No travel history	34(8)	22(10)
Type	Imported	358(87)	188(89)	0.572
	Migrant workers	273(66)	126(59)
	Other	85(21)	62(48)
	Autochthonous	53(13)	24(11)
Living environment	Forest	231(56)	78(37)	<0.001
	Countryside	73(18)	63(30)
	City	45(11)	23(11)
	Unknown	62(15)	48(23)
Diagnosis	Plasmodium falciparum	166(40)	52(25)	0.001
	Plasmodium vivax	201(49)	135(64)
	Mixed	10(2)	4(2)
	Unidentified	34(8)	21(10)
Types	Severe	115(28)	36(17)	0.002
	Uncomplicated	296(72)	176(83)