• Parasites, Hosts and Diseases
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• v.54 no.6
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• pp.803-807
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• 2016

Toxascaris leonina is a common parasitic nematode of wild mammals and has significant impacts on the protection of rare wild animals. To analyze population genetic characteristics of T. leonina from South China tiger, its mitochondrial (mt) genome was sequenced. Its complete circular mt genome was 14,277 bp in length, including 12 proteincoding genes, 22 tRNA genes, 2 rRNA genes, and 2 non-coding regions. The nucleotide composition was biased toward A and T. The most common start codon and stop codon were TTG and TAG, and 4 genes ended with an incomplete stop codon. There were 13 intergenic regions ranging 1 to 10 bp in size. Phylogenetically, T. leonina from a South China tiger was close to canine T. leonina. This study reports for the first time a complete mt genome sequence of T. leonina from the South China tiger, and provides a scientific basis for studying the genetic diversity of nematodes between different hosts.

• The Journal of Korean Academy of Prosthodontics
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• v.25 no.1
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• pp.269-279
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• 1987

The purpose of this study was to obtain basic data needed to clinical diagnosis and treatment by investigating the occlusal wear facets and those related factors. Sixty-six subjects, ranging from 24 to 26 years of age without symptoms of stomatognatic system, were selected from dental students in Chosun University. The area of occlusal wear facets was measured and twenty subjects were selected, and divided into two groups (Group I and Group II). The Group I had small facet areas, and the Group II had large facet areas. These two groups were investigated into right and left side wear facet areas, vertical overlaps, occlusion types of working side, masticatory muscle activities, and asymmetry of right and left side masticatory muscle function. The results were as follows: 1. The average wear facet areas of all subjects was $22.84{\pm}88.95mm^2$, and Group I and Group II were $96.12{\pm}32.00mm^2$ and $372.94{\pm}65.63mm^2$ respectively. 2. The right and left wear facet areas of Group I were $46.72{\pm}14.36mm^2$ and $49.40{\pm}21.46mm^2$ respectively. The right and left wear facet areas of Group II were $175.27{\pm}45.75mm^2$ and $185.69{\pm}45.37mm^2$ repsectively. 3. The vertical overlap of Group I and Group II was $3.88{\pm}0.81mm$ and $2.88{\pm}1.14mm $ respectively. 4. Most of the Group I had Canine protection occlusion (80%), and most of the Group II had Group function occlusion (80%). 5. The masticatory muscle activities at rest position, maximum bite, habitual chewing, right and left unilateral chewing were greater in Group II than in Group I, especially in the masseter muscle of working side at right and left unilateral chewing. (P<0.01). 6. The asymmetry of right and left wear facets and masticatory muscle activities were greater in Group II than in Group I. (P<0.01).

• Journal of Veterinary Clinics
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• v.31 no.5
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• pp.361-366
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• 2014

The aim of this study was to determine if vaccines containing CPV-2 or CPV-2b provided protection against challenge with a recent Korean CPV-2a isolate. Twenty mongrel pups aged 9 weeks old were used. The commercial CPV-2 or CPV-2b vaccines were administered to each of the 8 pups thrice every 3 weeks, respectively. Two weeks after the last vaccination, all pups were challenged with CPV-2a (VR00174 strain) $1{\times}10^6\;TCID_{50}$. Clinical signs, fecal excretion of challenged CPV, and serological response of pups were observed for 2 weeks after challenge. All vaccinated pups did not display any clinical signs of disease after challenge with Korean CPV-2a isolate, whereas all non-vaccinated pups exhibited mucoid or hemorrhagic diarrhea, vomiting and anorexia. In all non-vaccinated pups, the virus could be detected in feces from 4 days after challenge, whereas in vaccinated pups, no evidence of viral excretion could be detected. Two of 4 non-vaccinated pups died 6 days after the challenge. This study showed that the two commercial CPV-2 and CPV-2b vaccines were effective in preventing infection and/or disease caused by the Korean CPV-2a isolate.