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RISS 인기검색어
- 검색키워드
- 저자 : 강구식 ( Kang Gu Sik ) (검색결과 3 건)
- 무료
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손봉환 ( Bong Whan Sohn ),강구식 ( Gu Sik Kang ) 한국동물위생학회 1991 한국동물위생학회지 (KOJVS) Vol.14 No.2
The somatic cell counts SCC and bacteria counts were done by D milk plant, P milk plant, S milk plant and Inch`on Vet. Serv. Lab from 1987 to 1990 with Coulter counter, Fossomatic 90, Bactoscan, Rolling ball viscometer and Resazurin reduction test. The results were summarized as follows. 1. In the distribution of SCC of the bulk herd milk, D milk plant from Nov. 1989 to Oct. 1990 remarks 80.2% on the range below 500,000, 14.5% ranging from 1,000,000 to 1,500,000, 1.2% ranging from 1,500,000 to 2,000,000, 0.69% ranging from 2,000,000 to 3,000,000, 0.71% on the range over 3,000,000. P milk plant remarks 237,000 in the first half year and 251,000 in the second half year in 1990 year. S milk plant remarks annual average of 335,000 in 1987, 273,000 in 1988 and 262,000 in 1989. The individual record of Inch`on Vet. Serv. Lab, remarks 79.35% and 80.2% below 500, 000 8.30% and 7.40% from 500,000 to 1,000,000, 2.37% and 3.2% from 1,000,000 to 1,500,000, 2.77% and 2.30% from 1,500,000 to 2,000,000, 1.67% and 2.00% from 2,000,000 to 3,000,000, 5.53% and 4.40% over 3,000,000 in 1989 and 1990, respectively. The grade distirbution of SCC is as follows; D milk plant shows 1st grade-80.20%, 2nd grade-16.5% and 3rd grade-3.30°o. And P milk plant shows all 1st grade. S milk plant shows 87.30%, 8.6% and 4.1°o in 1987 and 91.90%, 6.1% and 2.0% in 1988, and 92.40%, 6.1% 무이.5% in 1989 on the 1st, 2nd and 3rd grade respectively. 2. The distribution of bacteria. P milk plant reached 15,123 in 1st half year and 21.515 in 2nd half year. Also, S milk plant reached 81.5%, 12.5%, 6.0% in 1987, and 86.20%, 9.70%, 4.1% in 1988, and 86.2%, 10.8%, 3.0% in 1989 respectively for 1st, 2nd and 3rd grade. 3. The regional SCC distribution in D milk plant shows 1,540,000 in three regions and 714,000 in one region. And monthly SCC distribution shows 671,000 in December and 1,165,000 in June. 4. As a result of the individual SCC test, 9 times for 16 cows in , “I” farm(1986-1988), and 6 times for 13 cows in “D” farm(1987-1988) No.3, 5, 9, 14 cows in “I” farm showed the high SCC beyond 1,000,000 over 4-5times. 5. If the SCC over 300,000 reach 40%, the national producing quality of milk can be reduced by 87,600M /1 annually and in the sum of money, it should be about 35.5 billion Won. 6. The difference between high group and low group for SCC in D milk plant reached over 1,000,000. In case that the difference reaches 1,000,000 in the farm bulk milk at a farm breeding 20 cows which produce 20kg milk per day, it was estimate that the annual difference of producing quantity and sum of money respectively should be reached 26,280kg in milk and 10, 643,400 Won in income.
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간질감염우(肝蛭感染牛)에 대한 구충적기(驅蟲適期) 검토(檢討)(2)
손봉환 ( Bong Whan Sohn ),강구식 ( Gu Sik Kang ),한태호 ( Tae Ho Han ) 한국동물위생학회 1992 한국동물위생학회지 (KOJVS) Vol.15 No.1
A survey on the dosage optimal time for the bovine fascioliasis was carried out from Jan. 1987 to Dec. 1990. The results were summarized as follows: 1. The mean infection rate was 27.7%(1,662 heads were infected out of 3,247 heads in 205 herds). A seasonal infection rate was winter(34.6%) >spring(32.5%) >summer(24.7%) > autumn(22. 8%) 2. In the density of the fasciola spp. egg of infected bovine feces remarks 79.6% on the range below 10. 3. The density of fasciola spp. egg is not directly proportinal to the infection rate, and remarks on the range from 5 to 20. 4. In the herds dosed vermifuge the appearance of the fasciola spp. egg is as follows; 1~3 months show 3.8% and 4~6 months 8.5%. 5. The dosage optimal time for the bovine fasciliasis is as follows; 1) According to the monthly infection rate the first dosage optimal time is Dec and Feb and the second-Jun and Aug. 2) In the herd dosed vermifuge the dosage optimal time is to dose twice by 60 days interval after 3~4 months from previous dosage.
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