Abstract
The seasonal variations of the rate and intensity of metacercarial infection of C. sinensis in P. parva were observed. The fish were collected at Sun-Am river which located in Kim-Hae City, Kyong-Sang-Nam Do(=Province), Korea, from March 1983 to February 1984 every month. A total of 788 fish was examined. The number of metacercariae in each fish was individually counted after the individual digestion by artificial gastric juice. The result was as follows: During one year, 513(65.1%) out of 788 fish were infected with metacercariae. In May, June, July and September, the infection rates ranged from 82. 0 % to 98. 6% whereas the rates was relatively low in March, April, November and February raning from 11. 4% to 64.7%. The intensity of infection was similar with those of infection rates. The mean intensity per infected fish was 103.0 and standard deviation was 118.9 throughout one year. The highest mean intenstiy was in June(294. 8) and the lowest in Novebmver(11.1). The observed frequency of fish with certain intensities of metcercariae were fitted to theoretical equations derived from negative binomial distribution in March, April, November and February(p>0.05). Meanwhile, the equation of lognormal distribution were fitted with the observed frequencies in May, June, July and September(p>0.05, p>0.75). The variance/mean ratio varied by month. The value was the highest in July(814.3) and the lowest in November(158.8). Unlike our hypothesis, the metacercarial density of Clonorchis sinensis in its the most favourable fish host, Pseudorasbora parva showed considerable seasonal variations in the hyperendemic area.
The possible factors were discussed.
Citations
Citations to this article as recorded by
- Nondestructive detection of Clonorchis sinensis infection of raw Pseudorasbora parva fish by near-infrared hyperspectral imaging
Sai Xu, Huazhong Lu, Xin Liang, Zhenhui He
LWT.2024; 203: 116334. CrossRef - Prevalence of Clonorchis sinensis Metacercariae in Fish from Water Systems of Seomjin-gang (River)
Woon-Mok Sohn, Byoung-Kuk Na, Shin-Hyeong Cho, Mi-Yeoun Park, Cheon-Hyeon Kim, Min-Ah Hwang, Kyeong-Woo No, Ki-Bok Yoon, Hyun-Cheol Lim
The Korean Journal of Parasitology.2017; 55(3): 305. CrossRef - Prevalence of fish-borne trematodes of the family Heterophyidae at Pasak Cholasid Reservoir, Thailand
D. Krailas, N. Veeravechsukij, C. Chuanprasit, D. Boonmekam, S. Namchote
Acta Tropica.2016; 156: 79. CrossRef - Prevalence of Clonorchis sinensis infection in freshwater fishes in northeastern China
Y. Zhang, Q.C. Chang, Y. Zhang, L. Na, W.T. Wang, W.W. Xu, D.Z. Gao, Z.X. Liu, C.R. Wang, X.Q. Zhu
Veterinary Parasitology.2014; 204(3-4): 209. CrossRef - Prevalence ofClonorchis sinensisMetacercariae in Freshwater Fish from Three Latitudinal Regions of the Korean Peninsula
Shin-Hyeong Cho, Woon-Mok Sohn, Byoung-Kuk Na, Tong-Soo Kim, Yoon Kong, Keeseon Eom, Won-Seok Seok, Taejoon Lee
The Korean Journal of Parasitology.2011; 49(4): 385. CrossRef - Mortality of coho salmon (Oncorhynchus kisutch) associated with burdens of multiple parasite species
Jayde A. Ferguson, Wataru Koketsu, Ikuo Ninomiya, Philippe A. Rossignol, Kym C. Jacobson, Michael L. Kent
International Journal for Parasitology.2011; 41(11): 1197. CrossRef - Infection Status of Freshwater Fish with Metacercariae of Clonorchis sinensis in Korea
Eun-Min Kim, Jae-Lip Kim, Sung Yil Choi, Jae-Whan Kim, Siwon Kim, Min-Ho Choi, Young Mee Bae, Soon-Hyung Lee, Sung-Tae Hong
The Korean Journal of Parasitology.2008; 46(4): 247. CrossRef - Infection status of pond smelts, Hypomesus olidus, and other freshwater fishes with trematode metacercariae in 6 large lakes
Shin-Hyeong Cho, Woon-Mok Sohn, Sung-Shik Shin, Hyeon-Je Song, Taek-Gyun Choi, Chang-Mi Oh, Yoon Kong, Tong-Soo Kim
The Korean Journal of Parasitology.2006; 44(3): 243. CrossRef - Infection status with trematode metacercariae in pond smelts, Hypomesus olidus
Hae-Seon Nam, Woon-Mok Sohn
The Korean Journal of Parasitology.2000; 38(1): 37. CrossRef - The infestation states and changing patterns of human infecting metacercariae in freshwater fish in Kyongsang-do and Kyonggi-do, Korea
H J Rim, K H Kim, K H Joo, S J Kim, K S Eom, M S Chung
The Korean Journal of Parasitology.1996; 34(2): 95. CrossRef
