• Title, Summary, Keyword: Sero-prevalence

Search Result 36, Processing Time 0.047 seconds

Sero-epidemiological survey of rickettsial infections among domestic dogs in Korea (국내 개의 리켓치아 감염에 관한 역학조사)

  • Kim, Hee-sun;Kang, Mun-il;Lee, Chai-yong;Kim, Sung-ho
    • Korean Journal of Veterinary Research
    • /
    • v.35 no.4
    • /
    • pp.759-767
    • /
    • 1995
  • One hundred twelve domestic dog sera were collected from Kyonggi, Kanngwon, Cholla, and Kyongsang province. All the sera were examined by immunofluorescence antibody test(IFAT) against scrub typhus, murine typhus and spotted fever group rickettsia infection. The antibody prevalence was 5.40%(6/112) against scrub typhus. The sero-prevalence rates of scrub typhus were 16.30%(5/31) in Cholla and 5.90%(1/17)in Kyonggi areas. The prevalence of scrub typhus was higher in older dogs that were 6 years or more. The antibody prevalence was 8.04%(9/112) against murine typhus. The sero-positive rates to murine typhus were 5.88%(1/17) in Kyonggi, 8.33%(2/24) in Kangwon, 9.68%(3/31) in Cholla, and 7.50%(3/40) in Kyongsang areas, respectively. The sero-positive dogs to murine typhus were widely distributed throughout all age groups from 2 months to above 9 years old. The antibody prevalence was 16.96%(19/112) for spotted fever group rickettsial infection. The sero-positive rates of spotted fever group rickettsia were 11.76%(2/17) in Kyonggi, 12.90%(4/31) in Cholla, and 32.50%(13/40) in Kyongsang areas. The sero-positive dogs to spotted fever group rickettsia were observed at all age groups of dog. The sero-positive prevalence between sex showed higher in female than in male except for spotted fever group rickettsia infection.

  • PDF

Sero-prevalence of swine influenza virus (H1N1, H3N2) In Korea (국내의 돼지 인플루엔자 바이러스(H1N1, H3N2)의 혈청학적 조사)

  • Yoon, Jai-soon;Park, Bong-kyun;Han, Jeong-hee
    • Korean Journal of Veterinary Research
    • /
    • v.47 no.3
    • /
    • pp.273-279
    • /
    • 2007
  • Swine influenza is an acute, infectious respiratory disease caused by type A influenza viruses in pigs. In the previous studies, serological surveys have indicated the presence of H3N2 swine influenza virus (SIV) since 1995 in Korea. And the percentage of the antibody-positive rate was 39.12% in the survey determining the prevalence of H1N1 SIV antibodies in 2002. The purpose of this study was therefore to investigate the sero-prevalence of SIV regard to the age of the pig and the season between June 2004 and May 2005. In this study, a total of 932 sera were used. These sera were randomly selected from blood samples, which were submitted to Department of Veterinary Pathology, Kangwon National University and Department of Veterinary Virology, Seoul National University from June 2004 to May 2005. These sera have been tested by ELISA test kit (IDEXX Lab, USA) for the SIV H3N2, H1N1 respectively. SAS version 9.1 was used for the statistical analysis based on the age of the pig and the season. The overall sero-prevalence of the antibody against H3N2 SIV was 20.82% (194/932). The overall sero-prevalence of the antibody against H1N1 SIV was 37.23% (347/932). The overall dual sero-prevalence of the antibody against H3N2 and H1N1 SIV was 10.62% (99/932). H3N2 has significant difference in statistically regarding the age of the pig and the season (p<0.0001). H1N1 has significant difference in statistically regarding the age of the pig (p<0.0001) but has not significant difference in statistically regarding the season (p=0.5882).

Prevalence of Toxoplasma gondii infection from domestic pigs in Gyeongnam province (경남지역의 돼지톡소플라즈마병 감염실태 조사)

  • Kim, Eun-Gyeong;Park, Ho-Jung;Son, Byeong-Guk;Jung, Myeong-Ho;Heo, Jung-Ho;Hwang, Bo-Won
    • Korean Journal of Veterinary Service
    • /
    • v.33 no.4
    • /
    • pp.345-351
    • /
    • 2010
  • Toxoplasma gondii is a species of parasitic protozoa in the genus Toxoplasma. The definitive host of T. gondii is the cat, but the parasite can be carried by the vast majority of warm-blooded animals, including humans. It is often found in the tissues of food animals including pigs and sheep. To determine the regional prevalence of infection with T. gondii, bloods (n=300) from domestic pigs and tissues (n=200) from slaughter pigs in Gyeongnam province were tested using an enzyme-linked immunosorbent assay (ELISA) and a polymerase chain reaction (PCR) for detection of antibody and antigen. A total of 115 sero-positive pigs were identified for a prevalence rate of 38.3%. Of the 50 herds from domestic pigs tested, 34 had at least one sero-positive pig for a herd prevalence rate of 68.0%. Sero-positive rates of pigs in fattening farm were higher than that of pigs in breeding company. Sero-positive rates of sows were higher than that of growing pigs. Seasonally, sero-positive rates of pigs were highest in winter (80.0%) and lowest in spring (23.8%). According to farm size, sero-positive rates of pigs were higher in small size farms (${\leq}$2,000) than that of big size farms (>2,000). However, none of the bloods (n=300) from domestic pigs and tissues (n=200) from slaughter pigs were positive for T. gondii specific DNA by PCR.

Sero-prevalence against porcine parvovirus in sows and 30-, 60-, 90-day-old pigs in Korea (한국에서 사육중인 모돈 및 30, 60, 90일령 돼지의 돼지파보바이러스에 대한 혈청학적 역학조사)

  • Kim, Hye-soo;Park, Jung-suh;Oh, Jin-sik;Park, Bong-kyun
    • Korean Journal of Veterinary Research
    • /
    • v.41 no.4
    • /
    • pp.505-510
    • /
    • 2001
  • A total of 701 swine sera from 55 swine farms (Mar, 1998 through Feb, 2001) were nation-widely collected for the presence of antibody to porcine parvovirus (PPV) in sows and 30-, 60-, 90-day-old pigs. Sero-prevalence by haemagglutination inhibition assay with guinea pig red blood cells was investigated on the basis of year, region and season, respectively. In general, there was no significant difference with gradual decrease of passive immunity for the sero-prevalence to PPV in sows and 30-, 60-, 90-day-old pigs for the period of 1999 and 2000. However, regional variation was observed in the provinces of Kyonggi, Choongnam and Kyungnam, Natural infection of the virus in 90-day-old pigs was increased during the fall and the winter. Thus, it seems that the natural infection of PPV in growing pigs may be attributed to the increased outbreak of postweaning multisystemic wasting syndorme in co-infection with porcine circoviruses.

  • PDF

Sero-prevalence against a H3 subtype isolate of swine influenza virus (돼지인플루엔자바이러스 A형 H3 국내 분리주에 대한 혈청학적 역학조사)

  • Kim, Jong-Rhan;Rhie, Jay-Young;Song, Dae-Sub;Oh, Jin-Sik;Park, Bong-Kyun
    • Korean Journal of Veterinary Research
    • /
    • v.42 no.4
    • /
    • pp.523-529
    • /
    • 2002
  • A Total of 703 swine sera from 55 swine farrns (Mar. 1998 through Feb. 2001) were nation-wide collected for the presence of the antibody to influenza A virus H3 subtype isolate. The presence of antibody was tested by hernagglutination inhibition with chicken red blood cells and seropositiveness was determined by HI titer ${\geq}1$: 40. Sero-prevalence was evaluated based on year, season, region and age, respectively. In consequence, there were seme differences by year, season and region, respectively. High susceptibility was routinely observed in 60 and 90 day-old piglets. Therefore, it seems that the sero-prevalence to swine influenza virus H3 subtype isolate is useful for the prevention and control of swine influenza in Korea.

Prevalence of Anti-bovine Leukemia Virus Antibodies in Dairy and Korean Native Cattle (우리 나라 젖소 및 한우의 Bovine Leukemia Virus 항체 분포조사)

  • 서국현;이정길;이채용;허태영;강석진;손동수;류일선;안병석;김남철
    • Journal of Veterinary Clinics
    • /
    • v.20 no.2
    • /
    • pp.172-176
    • /
    • 2003
  • As a baseline study for the establishment of bovine leukemia virus(BLV)-free herd in Korea, the prevalence of anti-BLV antibody was determined in the present study. Sera from Korean native cows of 8 provinces and from dairy cattle of 9 provinces were subjected to enzyme-linked immunosorbent assay. Anti-BLV antibodies were positive in two (0.14%) of 1,413 Korean native cows. In contrast. 54.2% of 2,415 dairy cows were positive for anti-BLV antibodies, and their seropositive herd rate was 86.8%. And no differences were found in the sero-positive rates with age. The results indicate that the BLV infection rate has been increased continuously in Korea and that the establishment of BLV-free herd is imminent.

SERO-EPIDEMIOLOGICAL STUDY OF BRUCELLOSIS AMONG GOATS AND SHEEP AT PESHAWAR DISTRICT

  • Ghani, M.;Siraj, M.;Zeb, A.;Naeem, M.
    • Asian-Australasian Journal of Animal Sciences
    • /
    • v.8 no.5
    • /
    • pp.489-494
    • /
    • 1995
  • Sero-epidemiological study was carried out to observe the prevalence of brucellosis in 500 slaughtered as well as in 500 healthy animals in Peshawar district of N.W.F.P. All serum samples were subjected to four serological tests i.e. Standard Plate Test (SPT), Standard Tube Test (STT), Rivanol Test (RV) and 2, Mercapto-Ethanol Test (2, ME). The incidence of disease in 500 healthy animals tested by standard plate test, standard tube test, rivanol test and 2, Mercapto-ethanol test, was 2.8%, 1.8%, 1.6% and 1.2% respectively. While the incidence of brucellosis in 500 slaughter animals from Peshawar abattoir was 3.0%, 2.2%, 2.00% and 1.2% by standard plate test, standard tube test, rivanol test and 2, Mercapto-ethanol test The disease prevalence was higher in slaughtered animals as compared to healthy animals. The disease was more common in goats than sheep, also more prevalence in aged female than younger stocks. The efficacy of SPT was found more effective as compared to STT, RV, and 2, ME tests both in slaughtered as well as apparently healthy animals at Peshawar district. Standard Plate test detected 2.9%, Standard Tube test 2.0%, Rivanol test 1.8% and 2, Mercapto-ethanol test detected 1.2% positive cases in slaughtered as well as in healthy animals. So the Standard Plate Test was found to be more reliable, sensitive, and easy to performed.

Rabies immune status in the stray and companion dogs in Korea

  • Yang, Dong-Kun;Yoon, Soon-Seek;Lee, Kyoung-Ki;Byun, Jae-Won;Bae, You-Chan;Oh, Yoon-I;Song, Jae-Young
    • Korean Journal of Veterinary Research
    • /
    • v.50 no.2
    • /
    • pp.133-137
    • /
    • 2010
  • Rabies virus (family Rhabdoviridae, genus Lyssavirus, RV) is the causative agent of rabies in mammals. We conducted a sero-epidemiological survey for RV using sera from South Korean stray and companion dogs in the present study. A total of 533 canine serum samples were collected between February 2006 and December 2007 and were screened for rabies immunity with a neutralizing peroxidase linked assay. Both companion (49.1%) and stray (60.1%) dogs demonstrated RV seropositivity. Regional RV antibody prevalence was measured in the Jeju (87.5%), Gyeonggi (62%), Gyeongsang (59.1%), Jeonra (42%), Chungcheong (37.9%), and Gangwon (30.4%) provinces. Prevalence increased with age but did not exceed 80% in any age group. Stray and companion dogs had RV antibody prevalence values of 26.7% and 23.7%, respectively. Seroprevalence was significantly associated with age $({\chi}2\;=\;9.46;\;p\;=\;0.024)$ for companion dogs, although this association was not evident in stray dogs. There were no significant differences in age between stray and companion dogs and no gender differences in RV seroprevalence. Our results suggested that a widespread and reinforced vaccination program must be applied to Korean dogs.

Seroprevalence and epidemiological analysis of porcine reproductive and respiratory syndrome virus in Korea (돼지 생식기호흡증후군 바이러스의 항체분포 및 역학조사)

  • Park, Choi-kyu;Chang, Chung-ho;Kang, Yung-bae;Lee, Chang-hee;Lyoo, Young-soo;Kim, Hyun-soo
    • Korean Journal of Veterinary Research
    • /
    • v.39 no.1
    • /
    • pp.111-117
    • /
    • 1999
  • A nation wide sero-epidemiological survey of porcine reproductive and respiratory syndrome(PRRS) was carried out to analyze the current status of the PRRS virus infections in the field using the indirect immunofluorescent antibody assay(IFA) with the field isolate PL96-1. Since the first report of the antibody detection to PRRSV in 1993, the prevalence of seropositive pigs has increased dramatically and the data indicate that over 21% of the pigs and around 60% of the farms showed seropositives to the PRRS virus. A slightly higher positive rate was recognized in breeders than fattenings and it might be due to the higher age at the time of testings. No significant regional differences were detected in the sero-epidemiological survey. Higher sero-positive rate in growers indicates that PRRSV infection in the field was common after weaning(around 40 days). However, the number of seropositive pigs were declined in fattening pigs. Sows showed around 26% of sero-positive rate that there is a higher chance of continuous virus circulation in the infected farms. Low rate of sero-positivity in boars(9.8%) implies that there is high demand in proper control measures to prevent virus spreading through breeding procedures such as natural or artificial insemination. Therefore it was concluded that PRRSV infection in domestic swine herds is endemic and the positive rate and economic loses will be increased by spontaneous infections in naive farms.

  • PDF

Prevalence and Genetic Characteristics of Meatborne Listeria monocytogenes Isolates from Livestock Farms in Korea

  • Oh, Hyemin;Kim, Sejeong;Lee, Soomin;Lee, Heeyoung;Ha, Jimyeong;Lee, Jeeyeon;Choi, Yukyung;Choi, Kyoung-Hee;Yoon, Yohan
    • Food Science of Animal Resources
    • /
    • v.36 no.6
    • /
    • pp.779-786
    • /
    • 2016
  • This study aimed to evaluate the prevalence of Listeria monocytogenes on livestock farms in Korea and determine their serotypes and genetic correlations. Twenty-five livestock farms in Korea (central: 15, south west: 7, south east: 3) were visited 2-3 times, and 2,018 samples (feces: 677, soil: 680, silage: 647, sludge: 14) were collected. Samples were enriched in LEB (Listeria enrichment broth) and Fraser broth media, and then plated on Palcam agar. The isolates were identified by PCR and 16S rRNA gene sequencing. Then, the sero-types, presence of virulence genes (actA, inlA, inlB, plcB, and hlyA), and antibiotic resistance were determined. Genetic correlations among the isolates were evaluated by analyzing the restriction digest pattern with AscI. Of the 2,018 samples, only 3 (0.15%) soil samples (FI-1-FI-3) from 1 farm in the south east region were positive for L. monocytogenes. Based on biochemical tests and multiplex PCR, the serotype of the isolates were 4ab (FI-1 and FI-3) and 3a (FI-2), which are not common in foodborne L. monocytogenes. The 3a sero-type isolate was positive for all tested virulence genes, whereas the 4ab serotype isolates were only positive for hlyA, actA, and inlA. The isolates were resistant to all 12 tested antibiotics, especially FI-3. The genetic correlations among the isolates were 100% for those of the same serotype and 26.3% for those of different serotypes. These results indicate that the prevalence of L. monocytogenes on livestock farms in Korea is low; however, the isolates are pathogenic and antibiotic resistant.