• Title/Summary/Keyword: Poultry disease

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A sampling and estimation method for monitoring poultry red mite (Dermanyssus gallinae) infestation on caged-layer poultry farms

  • Oh, Sang-Ik;Park, Ki-Tae;Jung, Younghun;Do, Yoon Jung;Choe, Changyong;Cho, Ara;Kim, Suhee;Yoo, Jae Gyu
    • Journal of Veterinary Science
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    • v.21 no.3
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    • pp.41.1-41.12
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    • 2020

  • Background: The poultry red mite, Dermanyssus gallinae, is a serious problem in the laying hen industry worldwide. Currently, the foremost control method for D. gallinae is the implementation of integrated pest management, the effective application of which necessitates a precise monitoring method. Objectives: The aim of the study was to propose an accurate monitoring method with a reliable protocol for caged-layer poultry farms, and to suggest an objective classification for assessing D. gallinae infestation on caged-layer poultry farms according to the number of mites collected using the developed monitoring method. Methods: We compared the numbers of mites collected from corrugated cardboard traps, regarding with length of sampling periods, sampling sites on cage, and sampling positions in farm buildings. The study also compared the mean numbers of mites collected by the developed method with the infestation levels using by the conventional monitoring methods in 37 caged-layer farm buildings. Results: The statistical validation provided the suitable monitoring method that the traps were installed for 2 days on feed boxes at 27 sampling points which included three vertical levels across nine equally divided zones of farms. Using this monitoring method, the D. gallinae infestation level can be assessed objectively on caged-layer poultry farms. Moreover, the method is more sensitive than the conventional method in detecting very small populations of mites. Conclusions: This method can be used to identify the initial stages of D. gallinae infestation in the caged-layer poultry farms, and therefore, will contribute to establishment of effective control strategies for this mite.

  • https://doi.org/10.4142/jvs.2020.21.e41 인용 PDF

Epizootiological Study on the Outbreaks of Newscastle Disease in Korea (한국에 있어서 뉴캣슬병 발생의 역학적 조사)

  • 박근식
    • Korean Journal of Poultry Science
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    • v.6 no.1
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    • pp.38-46
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    • 1979

  • This study was directed to the Peizootics of Newcastle disease in Korea. Since 1960 New-castle disease epizootics have been observed at an interval of one or two years. The frequency of Newcastle disease outbreaks was related to the amount of the vaccine used, being the more sufficient vaccine produced the fewer outbreaks. Regional distribution of Newcastle disease outbreaks was most frequent in the capital area, being the center of poultry raising and Poultry product marketing, and infrequent in areas distant from the capital. Spreading of Newcastle disease appears to be mainly due to the movement of infected chickens. More than 60 percent of the total outbreaks of Newcastle disease diagnosed at the Veterinary Research Institute in Anyang were observed in young chickens aged less than 60 days. Improper vaccination, interference by maternally derived antibody with the immune response following vaccination, ana immaturity of immune systems of young chickens might have contributed to the results. This view was further supported by the findings that 23 percent of the total flocks experienced Newcastle disease were not vaccinated at all and, in vaccinated flocks, virtually all of the flocks were vaccinated by the drinking water method, which has been known less effective compared to individual application or spraying methods.

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Poultry Disease and Its Prevention (가금질병과 방역 개선책)

  • 오경록
    • Korean Journal of Poultry Science
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    • v.23 no.2
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    • pp.99-106
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    • 1996

  • Because of the imminent market opening of livestock and poultry products, Korean poultry industry is faced an influx of contagious diseases from abroad. Due to the increasing trend of intensive and automatic poultry farming, the risks of catching various poultry epidemics are ever more increasing. For the prevention of poultry epidemics, the principles of biosecurity should be observed rather strictly. In addition, regular checking to confirm the presence or absence of latent diseases through serological test, post-mortem examination, and laboratory test, should be carried out routinely. Finally, all kinds of stress factors should be minimized to keep the flock healthy and productive, so that they can achieve their maximum genetic potential.

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