1.Echinostome Infections in the Striped-Field Mouse, Apodemus agrarius, and the Ussuri White-Toothed Shrew, Crocidura lasiura, Caught Near the Demilitarized Zone, Gyeonggi-do (Province), Republic of Korea.
Jong Yil CHAI ; Jae Hwan PARK ; Bong Kwang JUNG ; Sang Mee GUK ; Jae Lip KIM ; Eun Hee SHIN ; Terry A KLEIN ; Heung Chul KIM ; Sung Tae CHONG ; Luck Ju BAEK ; Jin Won SONG
The Korean Journal of Parasitology 2009;47(3):311-314
A total of 1,498 small mammals (rodents and insectivores), including Apodemus agrarius (n = 1,366), Crocidura lasiura (54), Mus musculus (32), Micronytus fortis (28), Eothenomys regulus (9), Micronys minutes (6), and Cricetulus triton (3), were live-trapped in Gyeonggi-do (Province) (Paju-si, Pocheon-gun, and Yeoncheon-gun) near the demilitarized zone (DMZ) from December 2004 to September 2005. A. agrarius was found to be infected with 3 species of echinostomes (Echinostoma hortense, Echinostoma cinetorchis, and Euparyphium murinum), while C. lasiura was infected with 1 species (Echinochasmus japonicas) of echinostome. Other mammals were free from echinostome infections. Total 16 E. hortense were detected in 7 (0.5%) mice, 9 E. cinetorchis from 5 (0.4%), and 3 E. murinum from 2 (0.1%) out of 1.366 A. agrarius examined. E. japonicus was found only in 1 (1.9%; total 3 specimens) C. lasiura. These results demonstrate that A. agrarius and C. lasiura, inhabiting near the DMZ of Gyeonggi-do serve as the natural definitive hosts for several species of echinostomes, although their infection rates are low. This is the first record of natural infections of A. agrarius with E. cinetorchis and C. lasiura with E. japonicus in the Republic of Korea.
Animals
;
Echinostoma/*isolation & purification
;
Echinostomiasis/parasitology/*veterinary
;
Humans
;
Insectivora/*parasitology
;
Korea
;
Mice
;
*Murinae/parasitology
;
Rodent Diseases/*parasitology
;
Rodentia
;
Shrews/parasitology
2.Detection and Molecular Characterization of Cryptosporidium spp. from Wild Rodents and Insectivores in South Korea.
Juha SONG ; C Yoon KIM ; Seo Na CHANG ; Tamer Said ABDELKADER ; Juhee HAN ; Tae Hyun KIM ; Hanseul OH ; Ji Min LEE ; Dong Su KIM ; Jong Taek KIM ; Hong Shik OH ; Moonsuk HUR ; Jae Hwa SUH ; Jae Hak PARK
The Korean Journal of Parasitology 2015;53(6):737-743
In order to examine the prevalence of Cryptosporidium infection in wild rodents and insectivores of South Korea and to assess their potential role as a source of human cryptosporidiosis, a total of 199 wild rodents and insectivore specimens were collected from 10 regions of South Korea and screened for Cryptosporidium infection over a period of 2 years (2012-2013). A nested-PCR amplification of Cryptosporidium oocyst wall protein (COWP) gene fragment revealed an overall prevalence of 34.2% (68/199). The sequence analysis of 18S rRNA gene locus of Cryptosporidium was performed from the fecal and cecum samples that tested positive by COWP amplification PCR. As a result, we identified 4 species/genotypes; chipmunk genotype I, cervine genotype I, C. muris, and a new genotype which is closely related to the bear genotype. The new genotype isolated from 12 Apodemus agrarius and 2 Apodemus chejuensis was not previously identified as known species or genotype, and therefore, it is supposed to be a novel genotype. In addition, the host spectrum of Cryptosporidium was extended to A. agrarius and Crosidura lasiura, which had not been reported before. In this study, we found that the Korean wild rodents and insectivores were infected with various Cryptosporidium spp. with large intra-genotypic variationa, indicating that they may function as potential reservoirs transmitting zoonotic Cryptosporidium to livestock and humans.
Animals
;
Animals, Wild/*parasitology
;
Cryptosporidiosis/*parasitology
;
Cryptosporidium/classification/*genetics/*isolation & purification
;
Feces/parasitology
;
Genotype
;
Insectivora/*parasitology
;
Molecular Sequence Data
;
Murinae
;
Phylogeny
;
Republic of Korea
;
Rodent Diseases/*parasitology
3.Intestinal Nematodes from Small Mammals Captured near the Demilitarized Zone, Gyeonggi Province, Republic of Korea.
Deok Gyu KIM ; Jae Hwan PARK ; Jae Lip KIM ; Bong Kwang JUNG ; Sarah Jiyoun JEON ; Hyemi LIM ; Mi Youn LEE ; Eun Hee SHIN ; Terry A KLEIN ; Heung Chul KIM ; Sung Tae CHONG ; Jin Won SONG ; Luck Ju BAEK ; Jong Yil CHAI
The Korean Journal of Parasitology 2015;53(1):135-139
A total of 1,708 small mammals (1,617 rodents and 91 soricomorphs), including Apodemus agrarius (n = 1,400), Microtus fortis (167), Crocidura lasiura (91), Mus musculus (32), Myodes (= Eothenomys) regulus (9), Micromys minutus (6), and Tscherskia (= Cricetulus) triton (3), were live-trapped at US/Republic of Korea (ROK) military training sites near the demilitarized zone (DMZ) of Paju, Pocheon, and Yeoncheon, Gyeonggi Province from December 2004 to December 2009. Small mammals were examined for their intestinal nematodes by necropsy. A total of 1,617 rodents (100%) and 91 (100%) soricomorphs were infected with at least 1 nematode species, including Nippostrongylus brasiliensis, Heligmosomoides polygyrus, Syphacia obvelata, Heterakis spumosa, Protospirura muris, Capillaria spp., Trichuris muris, Rictularia affinis, and an unidentified species. N. brasiliensis was the most common species infecting small mammals (1,060; 62.1%) followed by H. polygyrus (617; 36.1%), S. obvelata (370; 21.7%), H. spumosa (314; 18.4%), P. muris (123; 7.2%), and Capillaria spp. (59; 3.5%). Low infection rates (0.1-0.8%) were observed for T. muris, R. affinis, and an unidentified species. The number of recovered worms was highest for N. brasiliensis (21,623 worms; mean 20.4 worms/infected specimen) followed by S. obvelata (9,235; 25.0 worms), H. polygyrus (4,122; 6.7 worms), and H. spumosa (1,160; 3.7 worms). A. agrarius demonstrated the highest prevalence for N. brasiliensis (70.9%), followed by M. minutus (50.0%), T. triton (33.3%), M. fortis (28.1%), M. musculus (15.6%), C. lasiura (13.2%), and M. regulus (0%). This is the first report of nematode infections in small mammals captured near the DMZ in ROK.
Animals
;
Animals, Wild
;
Female
;
Helminthiasis/epidemiology/parasitology
;
Helminths/*classification/*isolation & purification
;
Insectivora/*parasitology
;
Intestinal Diseases, Parasitic/epidemiology/parasitology/*veterinary
;
Intestines/parasitology
;
Male
;
Prevalence
;
Republic of Korea/epidemiology
;
Rodentia/*parasitology
4.Intestinal Nematodes from Small Mammals Captured near the Demilitarized Zone, Gyeonggi Province, Republic of Korea.
Deok Gyu KIM ; Jae Hwan PARK ; Jae Lip KIM ; Bong Kwang JUNG ; Sarah Jiyoun JEON ; Hyemi LIM ; Mi Youn LEE ; Eun Hee SHIN ; Terry A KLEIN ; Heung Chul KIM ; Sung Tae CHONG ; Jin Won SONG ; Luck Ju BAEK ; Jong Yil CHAI
The Korean Journal of Parasitology 2015;53(1):135-139
A total of 1,708 small mammals (1,617 rodents and 91 soricomorphs), including Apodemus agrarius (n = 1,400), Microtus fortis (167), Crocidura lasiura (91), Mus musculus (32), Myodes (= Eothenomys) regulus (9), Micromys minutus (6), and Tscherskia (= Cricetulus) triton (3), were live-trapped at US/Republic of Korea (ROK) military training sites near the demilitarized zone (DMZ) of Paju, Pocheon, and Yeoncheon, Gyeonggi Province from December 2004 to December 2009. Small mammals were examined for their intestinal nematodes by necropsy. A total of 1,617 rodents (100%) and 91 (100%) soricomorphs were infected with at least 1 nematode species, including Nippostrongylus brasiliensis, Heligmosomoides polygyrus, Syphacia obvelata, Heterakis spumosa, Protospirura muris, Capillaria spp., Trichuris muris, Rictularia affinis, and an unidentified species. N. brasiliensis was the most common species infecting small mammals (1,060; 62.1%) followed by H. polygyrus (617; 36.1%), S. obvelata (370; 21.7%), H. spumosa (314; 18.4%), P. muris (123; 7.2%), and Capillaria spp. (59; 3.5%). Low infection rates (0.1-0.8%) were observed for T. muris, R. affinis, and an unidentified species. The number of recovered worms was highest for N. brasiliensis (21,623 worms; mean 20.4 worms/infected specimen) followed by S. obvelata (9,235; 25.0 worms), H. polygyrus (4,122; 6.7 worms), and H. spumosa (1,160; 3.7 worms). A. agrarius demonstrated the highest prevalence for N. brasiliensis (70.9%), followed by M. minutus (50.0%), T. triton (33.3%), M. fortis (28.1%), M. musculus (15.6%), C. lasiura (13.2%), and M. regulus (0%). This is the first report of nematode infections in small mammals captured near the DMZ in ROK.
Animals
;
Animals, Wild
;
Female
;
Helminthiasis/epidemiology/parasitology
;
Helminths/*classification/*isolation & purification
;
Insectivora/*parasitology
;
Intestinal Diseases, Parasitic/epidemiology/parasitology/*veterinary
;
Intestines/parasitology
;
Male
;
Prevalence
;
Republic of Korea/epidemiology
;
Rodentia/*parasitology
5.Plagiorchis muris infection in Apodemus agrarius from northern Gyeonggi-do (Province) near the demilitarized zone.
Jong Yil CHAI ; Jae Hwan PARK ; Sang Mee GUK ; Jae Lip KIM ; Hyo Jin KIM ; Won Hee KIM ; Eun Hee SHIN ; Terry A KLEIN ; Heung Chul KIM ; Sung Tae CHONG ; Jin Won SONG ; Luck Ju BAEK
The Korean Journal of Parasitology 2007;45(2):153-156
The small intestines of 6 species of rodents and 1 species of insectivore were examined seasonally for Plagiorchis muris infection in 3 different localities in northern Gyeonggi-do (Province), near the demilitarized zone (DMZ). A total of 1,496 animals, including 1,366 Apodemus agrarius, 54 Crocidura lasiura (insectivore), 32 Mus musculus, 28 Micronytus fortis, 9 Eothenomys regulus, 6 Micronys minutus, and 3 Cricetulus triton, were live-trapped at Yeoncheon-gun (n = 351), Paju-shi (804) and Pocheon-gun (343) at 3-mo intervals from December 2004 to September 2005. A total of 1,647 P. muris were collected from 72 (5.3%) A. agrarius. The infection rate was the highest in Pocheon-gun (8.2%), followed by Yeoncheon-gun (5.0%) and Paju-shi (4.2%). A higher infection rate was observed in A. agrarius captured during September (19.4%) than those captured during December (3.0%), June (2.6%), or April (0%). However, the worm burden was the highest in June (av. 32.1/animal), followed by September (24.7), December (4.0), and April (0). None of the other animal species were found infected with P. muris. The results reveal that A. agrarius is a natural definitive host for P. muris, and infection rates and worm burdens vary seasonally and geographically.
Animals
;
Arvicolinae/parasitology
;
Cricetinae
;
Cricetulus/parasitology
;
Insectivora/parasitology
;
Intestine, Small/parasitology
;
Korea/epidemiology
;
Mice/parasitology
;
Murinae/*parasitology
;
Prevalence
;
Rodent Diseases/epidemiology/*parasitology
;
Rodentia
;
Seasons
;
Trematoda/*isolation & purification
;
Trematode Infections/epidemiology/parasitology/*veterinary
6.Apodemus agrarius as a new definitive host for Neodiplostomum seoulense.
Jong Yil CHAI ; Jae Hwan PARK ; Sang Mee GUK ; Jae Lip KIM ; Hyo Jin KIM ; Won Hee KIM ; Eun Hee SHIN ; Terry A KLEIN ; Heung Chul KIM ; Sung Tae CHONG ; Jin Won SONG ; Luck Ju BAEK
The Korean Journal of Parasitology 2007;45(2):157-161
A total of 1,496 rodents and insectivores were live-trapped at Yeoncheon-gun (n = 351), Paju-shi (804), and Pocheon-gun (343), Gyeonggi-do (Province), and examined for intestinal helminths, including Neodiplostomum seoulense, seasonally from December 2004 to September 2005. Six species of rodents, including Apodemus agrarius (1,366), Mus musculus (32), Micronytus fortis (28), Eothenomys regulus (9), Micronys minutus (6), and Cricetulus triton (3), and 1 species of insectivores Crocidura lasiura (54) were collected. A total of 321 adult N. seoulense were collected from 19 (1.4%) A. agrarius. The worm burden ranged from 1 to 101 per A. agrarius (mean; 16.9). No N. seoulense was observed in other rodent or insectivore species examined. The infection rate during autumn (4.5%) was higher than those during spring (0.8%), summer (0.8%), and winter (0.5%). The average number of N. seoulense in infected A. agrarius was the highest in spring (66.0 specimens), followed by autumn (15.2), winter (4.5), and summer (3.3). This study first confirms that A. agrarius is a natural definitive host for N. seoulense, and demonstrates that the infection rates and intensities vary seasonally and geographically.
Animals
;
Arvicolinae/parasitology
;
Cricetinae
;
Cricetulus/parasitology
;
Feces/parasitology
;
Geography
;
Insectivora/parasitology
;
Intestine, Small/parasitology
;
Korea/epidemiology
;
Mice
;
Murinae/*parasitology
;
Rodent Diseases/*epidemiology
;
Seasons
;
Trematoda/*isolation & purification
;
Trematode Infections/epidemiology/*veterinary