TY - JOUR AU - Le, Nguyen Thi AU - Doanh, Pham Ngoc AU - Minh, Nguyen Thi AU - Ha, Nguyen Van PY - 2014/11/12 Y2 - 2024/03/29 TI - Identification and distinction of two Paragonimus metacercaria types found in the same crab species Potamiscus tannanti Rathbun, 1904 collected in Yenbai province JF - Academia Journal of Biology JA - AJB VL - 29 IS - 1 SE - Articles DO - 10.15625/0866-7160/v29n1.5351 UR - https://vjs.ac.vn/index.php/vjbio/article/view/5351 SP - 6-9 AB - <p>Although three species of the genus <em>Paragonimus </em>Braun, 1899, including <em>P. westermani</em> (Kerbert, 1878), <em>P. heterotremus </em>Chen et Hsia, 1964 and <em>P. ohirai</em> Miyazaki, 1939, have been recorded in Vietnam, only the metacercaria of <em>P. heterotremus</em> has been collected by previous authors. During investigations in the Yenbai province, we have collected two types of <em>Paragonimus</em> metacercariae in the same freshwater crab, <em>Potamiscus tannanti</em> (Rathbun, 1904). They remarkably differed from each other in morphology and size. The small metacercariae which were 0.212 ± 0.018 ´ 0.187 ± 0.016 mm in size, had thick inner cyst wall. In contrast, the bigger metacercariae, which were found for the first time in Vietnam, were 0.811 ± 0.079 ´ 0.775 ± 0.100 mm in size and provided with thin inner cyst wall, occupying the entire space of the cyst. The small metacercariae types and its adult worms were completely identical to <em>P. heterotremus</em>. In contrast, the big metacercaria types and its adult worms recovered from experimental dogs and cats differed from other known <em>Paragonimus</em> species. Morphologically, they were somewhat similar to <em>P. skrjabini</em> Chen, 1959 and <em>P. harinasutai </em>Miyazaki and Vajrasthira, 1967, but different from them either in metacercaria stage or adult worm. These <em>Paragonimus </em>sp<em>. </em>samples collected from the Yenbai province of Vietnam, might be of a new species to science.</p> ER -