Table 1.

Seasonal fluctuation of overall infestations of the Southeast Asian house rat (Rattus brunneusculus) with chiggers at Jingha village in southern Yunnan of China (2016–2017).

Months	Examined small mammal hosts		Collected chiggers		Overall infestations of R. brunneusculus with chiggers
	No. of hosts	Cr (%)	No. of mites	Cr (%)	PM (%)	MA (mites/rat)	MI (mites/rat)
1	182	8.87	6682	6.73	86.81	36.71	42.29
2	167	8.13	7131	7.19	87.43	42.70	48.84
3	182	8.87	8097	8.16	89.56	44.49	49.67
4	168	8.18	7119	7.17	86.31	42.38	49.10
5	184	8.96	11221	11.31	86.96	60.98	70.13
6	150	7.31	7725	7.79	94.67	51.50	54.40
7	152	7.40	12224	12.32	94.74	80.42	84.89
8	151	7.36	9003	9.07	91.39	59.62	65.24
9	141	6.87	7616	7.68	92.91	54.01	58.14
10	190	9.25	9400	9.47	91.05	49.47	54.34
11	197	9.60	6996	7.05	86.29	35.51	41.15
12	189	9.21	6007	6.05	92.59	31.78	34.33
Total	2053	100.00	99221	100.00	89.87	48.33	53.78

Annotation: The field investigation at Jingha village was made between April 2016 and March 2017, which forms a consecutive process from January to December.