全北地方 乳牛에 感染된 Hypoderma spp.에 關한 疫學的 調査(豫報) = Epideminological Studies on Hypoderma spp.Infection in Dairy Cattle of Jeonbuk District(Preliminary Report)

다국어 초록 (Multilingual Abstract)

Epideminological investigations have been carried out into Hypoderma spp. larva infection in 237dairy cattle from the 49 scattered farms of Jeonbuk District. The following is a brief summary of the leading facts gained through the investigations :
1.An investigation of 1972 as to the occurrence of Hypoderma spp. larva has disclosed that only 91(68.8%) out of 132 Canadian cattle imported in 1971 were holding larva whereas none of the larva was detected from the rest.
2. On an investigation by the method of 'anamnesis' as to the occurrence for the year 1971, it is found that the larva infection occurred in 22 only out of 32 Canadian cattle which were imported in 1970.
3. 110 mature larvae at their third periods, which were detected from 25 cattle, have been identified as those of H. bovis. The average size of the larva is 22.98mm. in length and 11.83mm. in width.
The question as to the acclimatifation of the Hypoderma spp. is likely to be settled through another investigation into occurrence of the larva in cattle for the year 1973 and also through breeding experiments of larva, pupa and adult. It is assumed, however, that they will find it hard to survive in such different climatic region as Korea.