• 대한수의사회지
• /
• 제28권6호
• /
• pp.344-347
• /
• 1992

This study was performed to investigate the infestation rate of heartworm(Dirofilaria immitis) in the peripheral blood of the dog being raised in Korea. Blood samples were obtained between 17 : 00 and 20 : 00 from June to August, 1991. Heartworm was exami

• 대한수의사회지
• /
• 제20권1호
• /
• pp.19-25
• /
• 1984

Seasonal infestation rate of Sarcoptes scabiei var suis were surveyed in 560 slaughter pigs of Kwangju area by means of microscopical detection of eggs and mites from ear scrapings, supplementing morphological observation of the mites. The results were su

• Parasites, Hosts and Diseases
• /
• 제33권3호
• /
• pp.243-244
• /
• 1995

인천시 소재 한 국민학교 어린이들이 머릿니 감염율을 알아보기 위하여 1995년 5월 26일과 27일 이틀간 국민학교를 방문하여 성충이나 서캐 감염 여부를 조사하였으며, 1,530명의 조사 대상자 중 5.0%가 성충이나 서캐에 감염되어 있었다. 여학생 762명 rdnsep 72명이 감염되어 9.4%의 감염율을 보였고, 남학생 768명 가운데 4명만이 감염되어 0.5%의 가염율을 나타내어, 여학생이 남학생보다 이에 대한 감염율이 높았다.

• Parasites, Hosts and Diseases
• /
• 제38권1호
• /
• pp.41-43
• /
• 2000

The infestation status of head louse among children attending primary schools and kindergartens in Chinju-shi, Kyongsangnam-do, Korea, was investigated between June and July 1999. Out of 2,288 children examined, 3.9% of boys (48/1,242) and 23.5% of girls (246/1,046) were infested with nits or adult/nymphs of lice. The effectiveness of lindane shampoo (1% gamma benzene hexachloride solution) was evaluated after one or two time applications to all the children infested. The negative conversion rate of pediculosis was 93.5%. Effective control measures are needed to control and prevent such ectoparasite infestation amongst children.

• Parasites, Hosts and Diseases
• /
• 제25권1호
• /
• pp.85-86
• /
• 1987

In order to know the prevalence of head louse among the school children in rural area, we visited 3 primary schools and a kindergarten in Sanbuk-myon, Mungyong-gun, Kyongsangbuk-do in July 1985, and examined the children to identify the adult worms of head louse and/or its nits on the hair. The overall infestation rate was 91.9% among 420 children examined, and there was a difference between schools (P<0.05). The school girls' rate, 96.1% was higher than that of boys' 88.9%(P<0.05). By grade, the rate of infant school was 88.5% and 1st to 6th grade were 100, 100, 95.8, 90.4, 89.7, 80.0% respectively. Above result indicates that the head louse is an important health problem in this community. Therefore, the chemotherapy and the effort to improve the hygiene are necessary in this community by physicians, teachers and health administrators.

• Asian-Australasian Journal of Animal Sciences
• /
• 제15권10호
• /
• pp.1453-1457
• /
• 2002

The experiment was conducted to find out the effect of 4 feeding systems on growth, feed intake, eating behavior, lactation performance, gestation period, post-partum heat period, conception rate and parasitic infestation of Black Bengal goat. Twenty four does of approximately 1 year of age were randomly selected for 4 treatment (feeding systems) groups having 6 replications in each. Treatments were stall feeding ($T_1$), tethering ($T_2$), restricted grazing ($T_3$) and grazing ($T_4$). $T_1$ group was housed continuously and adequate amounts of natural grass were supplied for ad libitum feeding. $T_2$ group was tethered for grazing natural grass from 8 a.m. to 4 p.m. being moved at one hour intervals. Goats of $T_3$ group were allowed grazing from 8 a.m. to 1 p.m. $T_4$ group was grazed from 8 a. m. to 4 p.m. Concentrate supplement was given at the rate of 150 g per day per goat for all of the treatment groups. Duration of experiment was 219 days. Daily live weight gain was significantly (p<0.05) higher in case of stall fed goats than that of others. DM intake also significantly (p<0.05) differed among the treatment groups and was 3.40 3.95, 3.76 and 4.05 per cent of their live weight for stall feeding, tethering, restricted grazing and grazing groups, respectively. Rate of rumination was significantly (p<0.05) higher in case of tethering group of goats than that of others. Birth weight of kids, milk yield, lactation period and post-partum heat period were significantly higher in case of stall fed goats than others. Tethering group showed significantly (p<0.05) higher litter size than others. Infestation rate of Fasciola was significantly (p<0.05) higher in the grazing group. In conclusion, it may be stated that among these feeding groups overall performance of stall fed goats was more satisfactory, and that the tethering group showed better performance than the others.

• Parasites, Hosts and Diseases
• /
• 제31권1호
• /
• pp.67-70
• /
• 1993

강원도내 국민학생들에게서 머릿니 감염상황을 알아보기 위하여 1990년 12월 도내 4개 국민학교에서 성충이나 서캐 감염 여부를 조사하였다. 912명의 대상 학생들 가운데 37.2%가 성충이나 서캐에 감염되어 있었다. 270명에서는 성충 및 서캐 감염을 구분하여 조사하였는데, 서캐만 발견된 경우가 36.3%, 성충만 발견된 경우 1.5%, 둘다 보인 경우가 21.9%로 머릿니 성충 감염율은 23.3% 이었다. 어떠한 구제법도 시행하지 알고 6개월 뒤 재조사한 한 학교에서 감염율이 처음 66.0% 에서 57.3%로 나타나 유의한 차이가 얼었다. 이러한 현상은 고도 감염집단에서 짧은 기간 동안 화학요법 시행 없이 자연적인 감염율의 감소를 기대하기 어려움을 잘 보여준다. 머릿니 감염의 역학에서 충체 양성율이 한 집단에서 직접적인 전파력을 표현하는 지수로 중요하다고 판단한다.

• 대한수의학회지
• /
• 제42권4호
• /
• pp.531-536
• /
• 2002

A total of 576 fatteners selected randomly from 6 Korean native goat farms in Chonnam area were examined for louse infestation from March 1997 to February 1998. The lice collected from the goats were identified. Four goat farms were selected and 20 goats were randomly chosen from each farm; blood samples were taken from the goats seasonally and examined hematologically and chemically. It was found that 495 out of 576 goats (85.9%) were infested with lice. The infestation rate in one of the 6 farms reached 92.9%. Two species of lice were identified; Linognathus sp. (sucking lice) and Bovicola sp. (biting lice). Goats infested with lice showed higher values in white blood cell, neutrophil and eosinophil counts than the goats not infested counterparts; same trend was seen with total protein, albumin and globulin concentrations. The results of this study indicate that louse infestation in the goat should be investigated extensively in view of the goat farming.

• Journal of Microbiology and Biotechnology
• /
• 제26권3호
• /
• pp.549-557
• /
• 2016

Aphids are a large group of hemipteran pests that affect the physiology, growth, and development of plants by using piercing mouthparts to consume fluids from the host. Based an recent data, aphids modulate the microbiomes of plants and thereby affect the overall outcome of the biological interaction. However, in a few reports, aboveground aphids manipulate the metabolism of the host and facilitate infestations by rhizosphere bacteria (rhizobacteria). In this study, we evaluated whether aphids alter the plant resistance that is mediated by the bacterial community of the root system. The rhizobacteria were affected by aphid infestation of pepper, and a large population of gram-positive bacteria was detected. Notably, Paenibacillus spp. were the unique gram-positive bacteria to respond to changes induced by the aphids. Paenibacillus polymyxa E681 was used as a rhizobacterium model to assess the recruitment of bacteria to the rhizosphere by the phloem-sucking of aphids and to test the effect of P. polymyxa on the susceptibility of plants to aphids. The root exudates secreted from peppers infested with aphids increased the growth rate of P. polymyxa E681. The application of P. polymyxa E681 to pepper roots promoted the colonization of aphids within 2 days of inoculation. Collectively, our results suggest that aphid infestation modulated the root exudation, which led to the recruitment of rhizobacteria that manipulated the resistance of peppers to aphids. In this study, new information is provided on how the infestation of insects is facilitated through insect-derived modulation of plant resistance with the attraction of gram-positive rhizobacteria.

• Journal of Forest and Environmental Science
• /
• 제26권2호
• /
• pp.113-116
• /
• 2010

The Acacia seyal Del. var. seyal belongs to family Mimosaceae is known locally as gum Talha tree. It is a multipurpose tree species occurs throughout the African gum belt in Savannah mostly in pure forest. In Sudan it thrives on heavy clay soils that receive an annual rainfall between 400-800 mm. It is an important source of rural energy (fuelwood and charcoal) and forage. As mentioned by Nair (2007) the economic damage causes by insect in natural forest often difficult to judge due to no enough research attention The tree is frequently affected by biotic factors among them the insect pests. During a survey in the 1980's the tree was severely infested by the longhorned beetles (Cerambycidae) severely infesting other Acacia species, but the ecological data are overlooked. Therefore, the objective of the study was to assess infestation characteristics and to determine environmental factors triggering the attack of longhorned beetles. A temporary random sampling technique was applied to observe the damage characteristics of the longhorned beetles on tree species during May-July 2007. Five sample plots occupies by A. seyal were taken in Kordofan region directly observed for the presence of hole of emergence of the longhorned beetles, presence of dusts, presence of insect stages, girdling as well as other characteristics of damage. The study results indicate that the infestation rate of trees in the sampled sites ranged between zero and 23.08%. Further ecological researches are recommended.