여러가지 저장온도(貯藏溫度)에서 S. typhi-murium, S. anatum 및 S. meleagridis의 생육내(生肉內) 증식(增殖) 및 생존(生存)에 관하여 관찰하였다. $10^{\circ}C$에서는 세가지 균종(菌種)이 모두 증식하고 접종후(接種後) 3일(日) 내지 5일(日)만에 최대균수(最大菌數)에 이르렀지만 $7^{\circ}C$나 그 이하에서는 증식하지 못하였다. $7^{\circ}C$ 및 $5^{\circ}C$에서는 접종후(接種後) 3적일(適日)까지는 균수(菌數)의 변동이 별로 없었지만 그 이후엔 약간 감소되었다. $12^{\circ}C$에서는 6개월간(個月間)의 실험기간 동안에 S. typhi-murium파 S. anatum 은 균수(菌數)가 대단히 서서히 감소되었지만 S. meleagrids는 다른 두 균종(菌種)보다는 균수(菌數)의 감소율(減少率)이 약간 더 컸다.

순화(純化)된 뉴켓슬병(病) 바이러스를 얻기 위(爲)한 기초적(基礎的)인 실험(實驗)으로 바이러스 재료(材料)를 완형액(緩衡液)의 종류(種類) 및 수소(水素)이온 농도(濃度), 한천농도(寒天濃度)를 달리한 한천(寒天)겔칼럼에 통과(通過)시켰다. 그러고 바이러스 재료(材料)의 혈구응집력가(血球凝集力價)와 총질소량(總窒素量)을 비교(比較) 측정(測定)하여 다음과 같은 결과(結果)를 얻었다. 1. 한천(寒天)겔 응과법(凝過法)을 뉴켓슬병(病) 바이러스의 순화(純化)에 간단(簡單)히 이용(利用) 할수 있다. 2. pH 7.0 이상(以上)의 인산식염(燐酸食鹽) 완형액(緩衡液)과 5~8%의 한천농도(寒天濃度) 입자(粒子)를 이용(使用)할때 가장 좋은 결과(結果)를 얻을 수 있었다. 3. 매시(每時) 5~10ml의 유출속도(流出速度)일때 55ml 부터 80ml의 유출액중(流出液中)에서 고농도(高濃度)의 바이러스를 얻을 수 있었다.

가축(家畜)의 선충류에 구충효력이 우수(優秀)하다는 Tetramisole을 이용(使用)하여 폐충인공감염돈에 5, 7, 5, 10, 및 12.5mg/kg을 사료(飼料) 혼여(混與) 및 피하주사(皮下注射)로서 구충효력을 검토(檢討)한 결과(結果) 다음과 같은 성적(成績)을 얻었다. 1. 투약별(投藥別)로 보면 10~12.5mg/kg이 가장 우수(優秀)하였다. 2. 투약별(投藥別)로 보면 사료혼여(飼料混與)가 피하주사법(皮下注射法)보다 우수(優秀)하였고 부작용(副作用)도 적었다. 3. 감염후(感梁後) 4내지 15일(日)째의 유약충에도 구충효과가 있었다. 4. 주요부작용(主要副作用)은 기침, 구토(嘔吐), 흥구(興舊), 호흡수증가등(呼吸數增加等)이었으나 일과성(一過性)으로 곧 소실(消失)되었고 투약(投藥)을 5~12.5mg/kg 범위내(範圍內)에서는 투약량(投藥量)이 따른 부작용(副作用)의 차이(差異)는 인정(認定)되지 않았다.

Pathological studies on the Enzootic Pasteurellosis of domestic rabbits were performed and discussed. The chief pathological findings were as follows: Grossly, pneumonic lesions were located mainly in apical and cardiac lobes. The lesions were well demarcated with unaffected surrounding tissue. The pleural surface of pneumonic lesions were usually appeared as yellowish~white fibrinous exudate and, in some cases, abscesses were also shown. Microscopically, various cellular exudates composed mainly of neutrophils, large monocytes and lymphocytes were observed in the alveolar spaces. Some alveolar spaces were filled mostly with fibrinous exudates. Occasionally, thrombosis accompanied with infarcts were encountered in pneumonic lesions. There were deposition of purulo-fibrinous exudates on the visceral pleura.

From 1962 to 1968, serum samples were collected from fowls of six provinces in Korea. The investigator tested for serum neutralizing antibody against the Beaudette strain of intecfious bronchitis virus. Twenty(40 percent)serum samples out of fifty revealed a neutralization index of more than 30. Neuralizing antibodies of infectious bronchitis virus are widely spread among chickens in Korea. Intensive poultry farming zones, adult chickens have been neutralizing antibody of infectious bronchitis virus.

Hematological surveys using Bendixen's and Goetze's Key for bovine lymphosarcoma were made in dairy herds which have been composed of the cows imported from United States, Canada and Japan, and their calves in the area of Taegu and Chung-Nam. The results obtained were summarized as follows: 1. Of 521 cattle, 15(2.9%) were hematologically positive for lymphosarcoma; 28(5.4%) were suspect with Bendixen's Key, and 7 (1.3%) were positive; 26(5.%) were suspect with Goetze's Key. 2. Of 14 herds, 5 were involved in positive or suspect for lymphosarcoma with Bendixen's and Goetze's Key more than 5 per cent. Of the above 5 herds, 3 were involved in positive or suspect more than 30 per cent. These findings suggest that repeated hematological examinations and continuous clinical observations are required in the herds showed higher level of per cent of positive or suspect.

Blood-examinations of 30 sexually intact female and male Korean cattle with normal blood values have been cescribed, to find drumstick (sex bud). The results obtained were as follows: 1) The cattle of positive appearance of drumstick in more than 500 neutrophils per individuals was 100% in female and 30% in male, respectively. 2) The appearance rate of drumstick in neutrophils to be found the hig hest in frequency of sex bud ranged in females from 0.2% to 2.0% (average 0.7%) and in males from 0% to 0.6% (average 0.08%). 3) Drumsticks were detected in lymphocytes (33%) as well as neutrophils and eosinophils in Korean cow.

1. The albumin, ${\beta}-globurin$ and ${\gamma}-globurin$ fractions of non-vaccinated bovine serum (Control) int declined, and a total protein and ${\alpha}-globurin$ level are advanced on the reversible rather than of vaccinated immumized bovine serum. (Table 5.) 2. Some few exists the to bring about changed in the individuals and sexual in a vaccinated bovine serum, however, Male serum globurin fractions are higher than Female globurin fractions percentage. (Table 1 and 3.) 3. Albumin fractions are Age-ablly variable, so that, younger's are rather lower than adult's such reported as in the another litratures. 4. In the monthly analysis of immunized bovine serum the first week to at dulation for third weeks were slowly advanced as variablly in serum-protein fractions of ater by the Black-leg No. 2 vaccination, then, albumin fractions were illustated as maximum ratio (42.73 3.49%) and increased much as 14.9% more than non-vaccinates, and ${\alpha}-globurin$ fractions indicated the minimum ratio(15.11 2.35%) at for 4th month after vaccination decrease much as about 7.71 % rather non-vaccinated normal bovine serum. (Table 4. and Fig 3.) Next, continuous advanced the ${\beta}-globurin$ fractions at first month as primary crisis in a diagram, and indicated the maximum ratio at 8th months as the second crieir on the its diagram of after vaccinati on, however, few changed in non-vaccinated bovine serum. (Figs 4.) Especially, ${\gamma}-globurin$ fractions are advanced the maximum ratio as 41. 45% 4.48% anp advanced to be widely range much as about 22.55% more than control serum at 5th months of after the vaccination. That is one of the most considerable evalution in Black-leg No. 2 vaccination to Korean calevs as great presence of the maximum immune antibodies at for 5th month after the vaccination. (Table 4. and Fig 4.) 5. In the relationship between vaccinated rabbit and Korean calves, serum protein fraractions were to be changed within the 3 weeks, so that albumin fractions of vaccinated immune bovine serum are increased as directly ratio, while vaccinated rabbit immunized serum showed the decrease as to reciprocal ratio. Although, conclude that ${\gamma}-globurin$ fractions are increased gradually by and large on the vaccinated immune bovine serum(B. P. S.) and vaccinated immune rabbit serum(R. P. S.) together. (Table 6).