Laboratory Medicine and Quality Assurance

Table. 2. Table 2

Performance of laboratories in microscopic examination of stool in clinical parasitology (2021)

Trial no.	Specimen no.	No. of participants	Organisms identified with acceptable accuracy	No. (%)	Organisms identified with unacceptable accuracy	No. (%)
Trial I	MPF-21-01	212	Anisakis spp.	201 (94.9)	Ascaris sp.	3 (1.4)
					Enterobius vermicularis	2 (0.9)
					No answer	6 (2.8)
	MPI-21-01	212	Giardia lamblia	206 (97.1)	Entamoeba hartmanni	1 (0.5)
					Entamoeba histolytica/E. dispar	4 (1.9)
					Trichostrongylus	1 (0.5)
	MPS-21-01	212	No parasite seen	208 (98.1)	Ascaris sp.	1 (0.5)
					Hookworm	2 (0.9)
					Trichuris trichiura	1 (0.5)
Trial II	MPF-21-02	211	No parasite seen	205 (97.1)	Enterobius vermicularis	1 (0.5)
					No answer	5 (2.4)
	MPI-21-02	211	Metagonimus yokogawai	209 (99.1)	Clonorchis sp.	2 (0.9)
	MPI-21-03	211	Enterobius vermicularis	211 (100.0)
Trial III	MPI-21-04	213	Ascaris sp.	211 (99.0)	Anisakis spp.	1 (0.5)
					Diphyllobothrium sp.	1 (0.5)
	MPI-21-05	213	Taenia sp.	211 (99.0)	Hymenolepis nana	1 (0.5)
					Schistosoma japonicum	1 (0.5)
	MPS-21-02	213	No parasite seen	211 (99.0)	Strongyloides stercoralis larva	1 (0.5)
					Taenia sp.	1 (0.5)
Subtotal	MPI	1,060		1,048 (98.9)^*		12 (1.1)
	MPF	423		406 (96.0)^*		17 (4.0)
	MPS	425		419 (98.6)^*		6 (1.4)
Total		1,908		1,873 (98.2)		35 (1.8)

*Statistically significance was found between the agreement rates of MPF and those of MPI or MPS (MPF vs. MPI or MPS, P=0.0007 or P=0.0207, respectively).

Lab Med Qual Assur 2022;44:185~190 https://doi.org/10.15263/jlmqa.2022.44.4.185