Laboratory Medicine and Quality Assurance

Table. 1.

Laboratory performance in microscopic stool examination for clinical parasitology (2022)

Trial no. Specimen no. No. of participants Organisms identified with acceptable accuracy No. (%) Organisms identified with unacceptable accuracy No. (%)
Trial I MPI-22-01 208 Cryptosporidium sp. 205 (98.6) Cystoisospora (Isospora) belli oocysts 1 (0.5)
Strongyloides stercoralis larva 1 (0.5)
Giardia lamblia 1 (0.5)
MPS-22-01 207 Metagonimus yokogawai 127 (61.4) Clonorchis sp. 71 (34.3)
No parasite seen 8 (3.9)
Paragonimus sp. 1 (0.5)
MPF-22-01 203 No parasite seen 203 (100)
Trial II MPI-22-02 209 Strongyloides stercoralis larva 207 (99.0) Enterobius vermicularis 2 (1.0)
MPS-22-02 209 No parasite seen 208 (99.5) Taenia sp. 1 (0.5)
MPF-22-02 202 Anisakis spp. 178 (88.1) Ascaris sp. 13 (6.4)
Enterobius vermicularis 7 (3.5)
Hookworm 2 (1.0)
Trichuris trichiura 1 (0.5)
No parasite seen 1 (0.5)
Trial III MPI-22-03 209 Trichuris trichiura 207 (99.0) Clonorchis sp. 2 (1.0)
MPS-22-03 209 No parasite seen 206 (98.6) Strongyloides stercoralis larva 2 (1.0)
Paragonimus sp. 1 (0.5)
MPF-22-03 204 No parasite seen 198 (97.1) Ascaris sp. 2 (1.0)
Cystoisospora (Isospora) belli oocysts 2 (1.0)
Strongyloides stercoralis larva 1 (0.5)
Trichuris trichiura 1 (0.5)
Subtotal MPI 626 619 (98.9) 7 (1.1)*,
MPS 625 541 (86.6) 84 (13.4)*
MPF 609 579 (95.1) 30 (4.9)*,
Total 1,860 1,739 (93.5) 121 (6.5)

*Statistically significant differences were observed in the agreement rates between MPS and MPI/MPF samples (P<0.0001, in both). Statistically significant differences were observed in the agreement rates between MPF and MPI samples (P<0.0001).

Lab Med Qual Assur 2024;46:194~199 https://doi.org/10.15263/jlmqa.2024.46.4.194
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