• Asian-Australasian Journal of Animal Sciences
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• 제22권7호
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• pp.931-936
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• 2009

Body weights of 862 Angora goats between birth and 36 months of age, recorded on a semiyearly basis from 1988 to 2000, were used to estimate genetic, permanent environmental and phenotypic covariance functions. These functions were estimated by fitting a random regression model with 6th order polynomial for direct additive genetic and animal permanent environmental effects and 4th and 5th order polynomial for maternal genetic and permanent environmental effects, respectively. A phenotypic covariance function was estimated by modelling overall animal and maternal effects. The results showed that the most variable coefficient was the intercept for both direct and maternal additive genetic effects. The direct additive genetic (co)variances increased with age and reached a maximum at about 30 months, whereas the maternal additive genetic (co)variances increased rapidly from birth and reached a maximum at weaning, and then decreased with age. Animal permanent environmental (co)variances increased with age from birth to 30 months with lower rate before 12 months and higher rate between 12 and 30 months. Maternal permanent environmental (co)variances changed little before 6 months but then increased slowly and reached a maximum at about 30 months. These results suggested that the contribution of maternal additive genetic and permanent environmental effects to growth variation differed from those of direct additive genetic and animal permanent environmental effects not only in expression time, but also in action magnitude. The phenotypic (co)variance estimates increased with age from birth to 36 months of age.

• 한국동물위생학회지
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• 제33권1호
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• pp.37-44
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• 2010

An enzyme-linked immnnosorbent assay (ELISA) has been performed for the detection of the prevailing toxinotypes of Clostridium perfringens obtained from conventional culturing of intestinal contents of goats which have died of suspected enterotoxaemia. The test was found effective to detect the toxins as well as types of the organism with less time and labor. The most prevailing type of C. perfringens causing enterotoxaemia in goat was C. perfringens type D (68.75%) and followed by C. perfringens type B (25%) and C (6.25%). No C. perfringens type A was detected. This study showed an intelligible picture of prevailing toxinotypes of C. perfringens in goats in Bangladesh. The use of the ELISA for the detection of clostridial types and toxins allows the differential diagnosis of C. perfringens types A, B, C and D enterotoxaemias from samples of intestinal contents and the typing of cultures of C. perfringens.

• 한국동물위생학회지
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• 제33권1호
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• pp.1-6
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• 2010

Monoclonal antibody (mAb)-based enzyme immune-slide assay (EISA) was used for the detection of Peste des petits ruminants (PPR) virus from field samples collected from a natural outbreak. The clinicopathological study was undertaken to diagnose the case primarily of PPR. Antigen was detected from discharges and faeces of infected goats and swabs of postmortem lesions prepared on glass slide or glass plate using acetone fixation. Nasal discharge collected at the early stage of disease course or lung is an appropriate ante- or postmortem sample for this technique, respectively. Convalescent polyclonal sera collected from recovered animals which were diagnosed as PPR by EISA showed high antibody titer against PPR by C-ELISA, demonstrating the satisfactory specificity of the test. Therefore, EISA is a sensitive and specific assay to confirm PPR infection both in field and laboratory conditions and especially suitable for developing country.

• 한국동물위생학회지
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• 제37권1호
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• pp.73-78
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• 2014

In February 2013, two Korean native goats with circling, dysphagia, sialorrhea, and death were submitted for necropsy to the Jeju Self-Governing Provincial Veterinary Research Institute. Histopathologically, multifocal to confluent micro-abscess composed of neutrophils and macrophages and severe multifocal perivascular cuffing were observed in pons, medulla oblongata, and cerebellum. Isolated bacteria from the brain sample were Gram-positive coccobacilli and were confirmed as Listeria (L.) monocytogenes by VITEK and PCR analysis. Based on clinical sign, histopathology and bacterial isolation, this case was diagnosed as encephalitic listeriosis. In our best knowledge, this is the first report of encephalitic listeriosis caused by L. monocytogenes in Korean native goats in Jeju.

• 농업과학연구
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• 제14권1호
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• pp.186-190
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• 1987

충남대학교(忠南大學校) 농과대학(慶科大學) 부속동물사육장(附屬動物飼育場)에서 사육중인 한국재래산양(韓國在來山羊) 및 면양(緬羊) 각(各) 3 두(頭)에 대하여 방목중(放牧中)에 있어서 forage material의 섭식상(攝食狀)을 연구할 목적(目的)으로 고안(考案)한 방법에 의하여 식도루관형성술(食道瘻管形成術)을 실시하여 다음과 같이 보고(報告)한다. 1. 고안(考案)된 식도루관형성술의 시술(施術)이 용이(容易)하였으며 섭식상(攝食狀)의 연구에 적합(適合)하였다. 2. 본(本) 법(法)에 의한 식도루관은 장착(裝着)이 확실(確實)하여 장기간(長期間)(1년이상(年以上))에 걸쳐 공시(供試)할 수 있었다.

• 한국동물위생학회지
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• 제28권2호
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• pp.107-112
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• 2005

In order to monitor the parasites, 204 fecal samples were taken from Korean indigenous goats of Iksan-branch. Then identification of the parasites was determined by the fecal examination using the floatation and microscopical examination, respectively. The detection of rates was $91.2\%$, and mixed infection rates were single $38.7\%,\;double\;28.4\%,\;triple\;15.2\%,\;Quadraple\;6.9\%\;and\;Qunituple\;20.0\%$. The isolated were identified as Eimeria spp from 169 heads, Strongyloides papillosus from 56 heads, Ostertagia spp from 24 heads, Trichostrongylus spp from 22 heads, Moniezia expensa from 18 heads, Oesophagostomum spp from 17 heads, Bonostomum spp from 12 heads, Cooperia spp from 12 heads, Heamonchus spp from 8 heads and Capillaria spp from 2 heads.

• 대한수의학회지
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• 제9권2호
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• pp.7-18
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• 1969

Researches to determine the infectious status on the pancreatic fluke, Eurytrema pancreaticum(Janson 1889) Looss, 1907, were made into several slaughter hauses at four different districts through seven years from 1963 to 1969. The infection rate showed 2962 positive of 5974 heads (49.6%) of cattle at the Seoul first slaughter hause in Seoul, 881 positive of 1021 heads (86.3%) in Cheju, and six(6) positive of 56 heads (11.1%) at Suwon, 58 positive of 306 heads(19.0%)at Joenju. The infection rate 53.1%, (2907 positive heads of total 7357 heads exammed) is the representative infection rate at the cattle eurytremiasis in Korea. It showed little variation through a year and was increased as compared with those of the past period, from 1915 to 1945. Fecal examinations in order to find out the local distribution of the pancreatic fluke were conducted on cattle, sheep, and goats raised in four districts, showing two(2) of 269 heads (0.7%) in Kyonggi-do, 41 of 212 heads (19.3%) in Cheju-do, and negative in both Chungnam-do and Joenbuk-do. When an artificial infection wss performed on rabbits and goats with metacercaria of the pancreatic fluke, Parenchyma of their pancreas were degenerated and the ducts were dilated. When cattle and sheep were infected naturally, the pancreatic ducts were also dilated, the wall was thickened, and adenomatous and epithelial hyperplasia was appeared. The conclusion, putting the foregoing pathological changes, has been arrived at chronic hyperplastic pancreatitis in the eurytremiasis of cattle, sheep, goats and rabbits.

• Asian-Australasian Journal of Animal Sciences
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• 제32권8_spc호
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• pp.1321-1330
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• 2019

Recent development of novel techniques in systems biology have been used to improve and manipulate the rumen microbial ecosystem and gain a deeper understanding of its physiological and microbiological interactions and relationships. This provided a deeper insight and understanding of the relationship and interactions between the rumen microbiome and the host animal. New high-throughput techniques have revealed that the dominance of Proteobacteria in the neonatal gut might be derived from the maternal placenta through fetal swallowing of amniotic fluid in utero, which gradually decreases in the reticulum, omasum, and abomasum with increasing age after birth. Multi "omics" technologies have also enhanced rumen fermentation and production efficiency of dairy goats using dietary interventions through greater knowledge of the links between nutrition, metabolism, and the rumen microbiome and their effect in the environment. For example, supplementation of dietary lipid, such as linseed, affects rumen fermentation by favoring the accumulation of ${\alpha}$-linolenic acid biohydrogenation with a high correlation to the relative abundance of Fibrobacteriaceae. This provides greater resolution of the interlinkages among nutritional strategies, rumen microbes, and metabolism of the host animal that can set the foundation for new advancements in ruminant nutrition using multi 'omics' technologies.

• Asian-Australasian Journal of Animal Sciences
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• 제32권8_spc호
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• pp.1275-1283
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• 2019

Goats (Capra hircus) were domesticated during the late Neolithic, approximately 10,500 years ago, and humans exerted minor selection pressure until fairly recently. Probably the largest genetic change occurring over the millennia happened via natural selection and random genetic drift, the latter causing genes to be fixed in small and isolated populations. Recent human-influenced genetic changes have occurred through biometrics and genomics. For the most part, biometrics has concentrated upon the refining of estimates of heritabilities and genetic correlations. Heritabilities are instrumental in the calculation of estimated breeding values and genetic correlations are necessary in the construction of selection indices that account for changes in multiple traits under selection at one time. Early genomic studies focused upon microsatellite markers, which are short tandem repeats of nucleic acids and which are detected using polymerase chain reaction primers flanking the microsatellite. Microsatellite markers have been very important in parentage verification, which can impact genetic progress. Additionally, microsatellite markers have been a useful tool in assessing genetic diversity between and among breeds, which is important in the conservation of minor breeds. Single nucleotide polymorphisms are a new genomic tool that have refined classical BLUP methodology (biometric) to provide more accurate genomic estimated breeding values, provided a large reference population is available.

• Journal of Preventive Veterinary Medicine
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• 제42권4호
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• pp.148-156
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• 2018

Clostridium perfringens (C. perfringens) may cause diarrhea and enterotoxemia in adult and young livestock, leading to problems in the production and management of farms. Four hundred fecal samples were collected from 25 goat farms located in Gyeongsangbuk-do Province in the Republic of Korea. Sixteen C. perfringens strains were isolates from fecal samples, and the isolates were identified as type A (n=11) and type D (n=5). Additionally, ${\alpha}$- and ${\varepsilon}$-toxin genes were detected in 16 and 5 strains by PCR, respectively, and the enterotoxin gene was presented in 2 strains. The antibiotic susceptibility test was performed using the disk diffusion method and E-test method. In the disk diffusion method, ampicillin (n=16) and chloramphenicol (n=15) were highly susceptible to 16 C. perfringens isolates. In the E-test method, ampicillin, amoxicillin, amoxicillin/clavulanic acid and meropenem were susceptible to more than 14 of 16 C. perfringens isolates. This study indicates that administration of antibiotics such as ampicillin, amoxicillin/clavulanic acid and meropenem can prevent and treat C. perfringens infections in goats.