• 한국동물위생학회지
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• 제31권2호
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• pp.207-217
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• 2008

This study was carried out to investigate the prevalence of fascioliasis of slaughtered and farmed cattle in Gwangju area from February to November in 2007. A total of 1,000 cattle fecal samples were collected from slaughter houses (n=805) and farms (n=185). Twelve (1.2%) were found as positive cases with excretion of the egg of Fasciola spp in the fecal specimens, and 128 (12.8%) were positive in intestinal parasitism using the flotation and sedimentation procedures. The infection rate of fluke larvae from the slaughtered cattle at abattoirs in Gwangju was 0.75% (6 out of 805 heads). In histopathology, there were several liver lesions such as inflammation with infiltration of eosinophil, polymorphonuclear cells, mononuclear cells and multinucleated giant cells, proliferation of connective tissue, calcification and abscess formation.

• International Journal of Industrial Entomology and Biomaterials
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• 제26권2호
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• pp.67-73
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• 2013

Antheraea mylitta Drury is basically a crossbreeding species, as such it seems to be potentially a good material for the exploitation of heterosis. In the present study F1 hybrid of wild ecorace Laria (L) and semi-domestic Daba (D) was raised and evaluated for various quantitative traits and biochemical parameters during larval stage. Improved fecundity ($+18{\pm}1.8%$ and higher egg hatching rate ($+10.96{\pm}1.3%$) was recorded in the F1hybrid ($L{\times}D$). Biochemical parameters studied in the hemolymph, midgut and fatbody of the larva showed significantly higher (P<0.05) total proteins and carbohydrate concentration besides digestive enzyme activity. Correspondingly SDS-PAGE revealed more number of protein bands in the hemolymph sample of F1s, ranging between 29 kDa to 66 kDa compared to parental lines. The present study demonstrates the positive heterosis effect in the F1 hybrid of Laria ${\times}$ Daba. Biochemical analysis indicates that, there is possibilities of exploitation of hybrids with specific parents targeted for desirable commercial traits (silk yield and fecundity). Moreover, most of these biochemical parameters can be used as markers to analyze the genetic improvement in the tasar silkworms.

• 한국동물위생학회지
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• 제14권1호
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• pp.7-12
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• 1991

Fecal samples were taken from 402 cows in Posung, Chonnam where was designated as a place for Korean native cattle breeding. Prevalence of intestinal parasitism were determined by the fecal examinations using the floatation and sedimintation procedures. 62.9% of the cows were found as positive cases with excretion of the eggs of Fasciola hepatica in the fecal specimens. Of those infected with F.hepatica 97 cows free of the pathogenic intestinal parasites were chosen for albendazole treatment. Albendazole tablets(10mg / kg) were administered to the cows twice at the interval of 4 weeks. Blood samples were collected via jugular vein prior to the first treatment. four weeks after the first treatment and four weeks after the second treatment respectively. At the same time fecal samples were collected for parasitological examination by sedimintation methods. The mean treatment count was 44 fluke egg per gram of feces, which compared with 27 EPG and 17 EPG four weeks after the first and second treatment, respectively. Most of the hematological values fluctuated within the normal range during the experiment. Eosinophil counts were high initially, decreased after the first treatment and there after remained steady.

• 한국환경보건학회지
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• 제2권1호
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• pp.1-4
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• 1975

The law prohibits use of human excreta without proper treatment since 1968 in Korea, but the rate of infection of parasitic diseases is high among all ages of people. An examination of parasitic eggs in soil and vegetables was performed from April to September, 1974, soil samples were collected near toilet, at gardens, at vegetable farms with excreta used and not used, and strawberry farms in Shindong myon, Chunseong-gun, Kangwon province, and vegetables collected were cabbage, young radish, lettuce, Welshonion, spinach and strawberry. Main findings are as follows 1. Positive samples of Ascaris lumbricoides are 18 out of 25(64%) in the soils near toilet, 9 out of 28(3.2%) in the garden soils and 8 out of 18(44%) in the soils of vegetable farms. 2. Trichocephalus trichiurus and Enterobius vermicularis were detected in 8 soil samples respectively Trichostrongylus orientalis 7(25%) and Ancylostoma duodenale 3(11%) out of in the soils near toilets. 3. Parasitic egg negatives are 62(55%) out of 112 soil samples. 4. Ascaris lumbricoides is found in 11 roots(48%) of cabbage and young radish out of 23 respectively, 14 lettuce(34%) out of 41,4 Welsh onion(40%) out of 10,3 spinach(33%) out of 9, and 2 strawberry(11%) out of 18. 5. Ancylostoma duodenale positives are 2 roots of cabbage(9%) out of 23, 4 young radish (17%) out of 23, and 7 lettuce(17%) out of 41, and negatives of parasitic eggs on vegetables are 62 roots(51%) out of 124 samples.

• 한국양식학회지
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• 제20권3호
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• pp.194-198
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• 2007

Reproductive traits of Palaemon gravieri such as embryo size, number of embryo (fecundity), incubation period, larval development mode, larval development period, larval survival and larval growth were described and compared to analyze the correlation among those traits. Embryo volume is a primary factor determining other ensuing reproductive features. Egg volume was $0.042mm^3$ in the first developmental stage. Embryo volume in P. gravieri was comparatively small which is indicative of great number of embryo (y = 3.0161x + 0.0185 $R^2$ = 0.74 positive isometric relationship) and relatively long incubation period. Larvae survived from zoea 1 to post-larvae and it took 45 days at $22^{\circ}C$. Survival rate of the larvae was rather great in the early stage and thereafter steadily decreased. Daily growth rate of larvae in P. gravieri at $22^{\circ}C$ was 0.0195 mm on average. They grew steadily as time went by. Incubation period was between 10-14 days at $22^{\circ}C$. Larval development mode was almost complete planktotrophic. PNR (point of no return) appeared to be the third day on average. Survival rate of larvae without feeding declined rapidly between 3 and 4 days. Larval development period and stage frequency were 23-30 days and 11 stages which imply prolonged larval period and high mortality. The pattern of brood production followed fast successive parturial pattern. Most ovigerous female had mature ovary when they performed parturial molt soon after hatching (larval release).

• Pediatric Gastroenterology, Hepatology & Nutrition
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• 제11권sup1호
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• pp.38-43
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• 2008

Enterobiasis and head lice infestations, contact-borne parasitic diseases, are the most prevalent parasitic infections of children in Korea, and they are transmitted by close contact with infected persons. They are not of major concern in public health, therefore their importance in children's health care are overlooked in Korea. Egg positive rates of Enterobius vermicularis have been reported to be 10~20% among children in kindergartens and primary schools. Enterobiasis is diagnosed by scotch tape anal swab, but repeated examination is necessary for accurate diagnosis. Albendazole or mebendazole are extremely effective for treatment, however, reinfections usually occur if treatment is not repeated at least three times at a 3-week-interval, targeting the whole family members including the patients. Environmental sanitation and health education are also necessary to guarantee the successful treatment of enterobiasis. Head lice infestation is still an indication of public health status. Children of 3 to 12 years old and their families have infestations more frequently, and girls have more than boys. Diagnosis can be made by identification of live lice or nits on the head. Pediculicides are effective treatment of infestations, however they do not kill nits completely, requiring second treatment. Recently wet combing is preferred as an alternative by parents in England because of possible toxicity of drugs and resistance of lice. It is impossible to completely prevent enterobiasis and/or head lice infestations. Therefore, mass screening and prevention are required, and, in local clinics, a thorough evaluation of the symptoms and past history, and appropriate laboratory tests are necessary.

• Parasites, Hosts and Diseases
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• 제49권2호
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• pp.183-185
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• 2011

The present study was performed to determine the prevalence of Enterobius vermicularis among preschool children in Gimhae-si, Korea. A total of 6,921 preschool children in 76 kindergartens were examined using the cellotape perianal swab method. The overall egg positive rate (EPR) was 10.5%. The EPR in boys was higher than that in girls (adjusted odds ratio (AOR): 1.5, P<0.001), and it was higher in rural than in urban children (AOR: 1.2, P=0.022). The present study confirmed that the prevalence of E. vermicularis infection is fairly high among preschool children in Gimhae-si. Therefore, systematic control and preventive measures should be adopted to reduce morbidity associated with this nematode infection.

• 한국동물위생학회지
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• 제30권1호
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• pp.165-173
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• 2007

In order to survey the prevalence of Toxocara cams in soil of playground in a detached dwelling area, 150 samples were taken from playground 50 unit. The survey was carried out during 3 months from July to September in 2006. The Egg of Toxocara canis were detected in 6 samples (4.0%) from 150 cases of playground. The prevalence of T canis by month was 6.0% in July, 4.0% in August, 2.0% in September, respectively. This study results suggested that the prevalence of T canis were decreased in 2006 compared to 18.5% (30 positive/162 samples) in 2000.

• 한국농촌간호학회지
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• 제2권1호
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• pp.33-42
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• 2007

Purpose: This study was done to determine the extent of Clonorchis sinensis infections as well as other parasitic infections and to determine the growth rate. Method: Analyzed test results were from 1,050 bowel samples taken at 3 public health subcenters located in Muju, North Jeolla Province during February and March 2007. Result: The results are summarized as follows; The egg positive rate by stool examination was 4.3%. Ascaris lumbricoides, Enterobius vermicularis, Clonorchis sinensis, Trichuris trichiura, Metagonimus, Paragonimus were detected. No one was infected with multiple parasites. Infection rate for Clonorchis sinensis was 3.5%. Statistical correlation to Clonorchis sinensis infection rate was as follows; Gender (p=0.001), Age (p=0.005), Proximity to a river (p<0.000), Drinking (p<0.000), Smoking (p=0.009), Cooking of freshwater fish (p<0.000), Confidence in subjective health status (p=0.032), Family history of infection (p=0.005), No significant correlation was found between Clonorchis sinensis infection rate and duration of stay (p=0.809) in the agricultural communities or between Clonorchis sinensis infection and knowledge of Clonorchis sinensis (p=0.113). Conclusion: The results of this survey show that there is a need to develop a program to test the condition of Clonorchis Sinensis infection and its growth rate in residents of rural communities.

• Asian-Australasian Journal of Animal Sciences
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• 제17권7호
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• pp.984-989
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• 2004

Three hundred and twelve female Tsaiya ducks from four lines (L1051, L1052, L1053 and L1054) were used in this study to investigate the changes in plasma calcium and inorganic phosphorus levels, blood pH, carbon dioxide partial pressure (pCO$_{2}$), bicarbonate ion concentration ($HCO_{3}^{-}$), and base excess (BE) during laying periods. The results indicated that plasma calcium and inorganic phosphorus concentration at 40 and 50 wks of age were higher (p<0.05) than those at other ages. Significant positive correlation coefficients were found between plasma calcium and inorganic phosphorus levels at each age tested from 20 to 50 wks. Ducks from L1053 showed lower (p<0.05) blood pH, BE and $HCO_{3}^{-}$ as compared with other lines. Ducks from L1054 had higher (p<0.05) blood pH, BE and $HCO_{3}^{-}$ than those of other lines showing that there were some differences on blood parameters among lines. Eggshell strength decreased with age up to 65 wks and remained constant thereafter. Egg weight increased gradually from 30 to 60 wks and decreased slightly after 70 wks of age. Plasma inorganic phosphorus level in 40 and 50 wks old birds was positively correlated with eggshell strength, while blood $HCO_{3}^{-}$ in 40 and 50 wks old birds was negatively correlated with eggshell strength.