• Parasites, Hosts and Diseases
• /
• 제26권1호
• /
• pp.65-68
• /
• 1988

경상남도 남해 지방산 숭어에서 Stellantchasmus falcatus의 길낭유충을 발견하고 횐쥐에 감염시킨 후 성충을 얻어 동정하였다. 검사한 숭어는 모두 10마리로서 크기 20~30cm이었고 그중 3마리에서 S. falcatus로 생각되는 퍼낭유충이 470개 검출되었다. 피낭유충은 원형 또는 타원형으로 크기 $0.15~0.20{\times}0.13~0.19mm$이었고 대부분이 숭어의 근육에서 발견되었다. 총 280개의 피낭유충을 횐쥐 5마리에 각각 30~100개씩 나누어 감염시키고 7~10일후에 흰쥐를 희생시켜 소장(소장) 내용물을 검경한 바 총 83마리의 성충이 회수되었다. 회수된 충체는 길이 0.41~0.70mm, 폭 0.32~0.39mm이었고, 장낭형(장낭형 ; elongated sac-like)의 expulsor를 가진 저정낭(seminal vesicle) 등 몇가지 형태학적 특징을 근거로 S. ialcatus Onji et Nishio, 1915로 동정되었다. 이 연구로 우리나라에서도 숭어가 S. falcatus의 제2중간숙주역할을 하고 있음이 확인되었고 이 홉충의 인체감염원이 되고 있을 것으로 추측되었다.

• Parasites, Hosts and Diseases
• /
• 제32권4호
• /
• pp.275-276
• /
• 1994

서을 소재 한 정신병원에서 이가 유행한다며. 관리를 요청받아 1988년 6월 27 28 이틀간 이 병원을 방문하여 환자들의 이 감염 여부를 조사하였다. 입원환자들의 일부인 대상자는 8개의 병동에 있었으며 모두 17세 이상이었다. 남자 143명 가운데 22명, 여자 438명 가운데 142명이 이에 감염되어 있었다. 이에 감염된 여자 142명 가운데 47명(33.1%)에서 층체가 발견되어 이 집단에서 매우 활발한 전파가 일어나고 있었음을 알 수 있었다. 이 병원에는 행려자들의 수용병동이 있어서, 새로 입원하는 사람들이 감염원이 되기에 계속 정기 검사와 화학요법을 통하여 관리하여야 이 퇴치가 가능할 것이다.

• Parasites, Hosts and Diseases
• /
• 제50권2호
• /
• pp.137-141
• /
• 2012

From 2006 to 2010, hospitals in Hanoi treated 10 human patients for dirofilariasis. The worms were collected from parasitic places, and identification of the species was completed by morphology and molecular methods. Ten parasites were recovered either from the conjunctiva (n=9) or subcutaneous tissue (n=1). The parasites were 4.0-12.5 cm in length and 0.5-0.6 mm in width. Morphological observations suggested all parasites as Dirofilaria repens. Three of the 10 parasites (1 from subcutaneous tissue and 2 from eyes) were used for molecular confirmation of the species identification. A portion of the mitochondrial cox1 (461 bp) was amplified and sequenced. Nucleotide and amino acid homologies were 95% and 99-100%, respectively, when compared with D. repens (Italian origin, GenBank AJ271614; DQ358814). This is the first report of eye dirofilariasis and the second report of subcutaneous tissue dirofilariasis due to D. repens in Vietnam.

• Parasites, Hosts and Diseases
• /
• 제52권6호
• /
• pp.701-705
• /
• 2014

The rumen parasite, Gastrothylax crumenifer (Platyhelminthes: Gastrothylacidae), is a highly pathogenic trematode parasite of goat (Capra hircus). It sucks blood that causes acute disease like anemia, and severe economic losses occur due to morbidity and mortality of the ruminant infected by these worms. The study of these rumen paramphistomes, their infection, and public health importance remains unclear in India especially in the western part of state Uttar Pradesh (U.P.), Meerut, India, where the goat meat consumption is very high. This paper provides the molecular characterization of G. crumenifer recovered from the rumen of Capra hircus from Meerut, U.P., India by the partial sequence of 28S rDNA. Nucleotide sequence similarity searching on BLAST of 28S rDNA from parasites showed the highest identity with those of G. crumenifer from the same host Capra hircus. This is the first report of molecular identification of G. crumenifer from this part of India.

• Parasites, Hosts and Diseases
• /
• 제51권2호
• /
• pp.177-182
• /
• 2013

The purpose of the present study was to evaluate the potential role of the 27-Kilodalton (KDa) antigen versus Fasciola gigantica adult worm regurge antigens in a DOT-Blot assay and to assess this assay as a practical tool for diagnosis fascioliasis in Egyptian patients. Fasciola gigantica antigen of an approximate molecular mass 27- (KDa) was obtained from adult worms by a simple elution SDS-PAGE. A Dot-Blot was developed comparatively to adult worm regurge antigens for the detection of specific antibodies from patients infected with F. gigantica in Egypt. Control sera were obtained from patients with other parasitic infections and healthy volunteers to assess the test and compare between the antigens. The sensitivity, specificity, positive and negative predictive values of Dot-Blot using the adult worm regurge were 80%, 90%, 94.1%, and 69.2% respectively, while those using 27-KDa were 100% which confirms the diagnostic potential of this antigen. All patients infected with Fasciola were positive, with cross reactivity reported with Schistosoma mansoni serum samples. This 27-KDa Dot-Blot assay showed to be a promising test which can be used for serodiagnosis of fascioliasis in Egyptian patients especially, those presenting with hepatic disease. It is specific, sensitive and easy to perform method for the rapid diagnosis particularly when more complex laboratory tests are unavailable.

• ALGAE
• /
• 제18권3호
• /
• pp.191-197
• /
• 2003

Histones are important proteins that interact with the DNA double helix to form nucleosome. Two putative histone genes, GjH2A-1 and GjH2A-2 were isolated from a red alga Griffithsia japonica. The putative open reading frame of GjH2A-1 and GjH2A-2 shared high similarity with the previously reported amino acid sequences of histone H2As. They have a motif consisting of seven amino acids A-G-L-Q-F-P-V, which matches the histone H2A motif [AC]-G-L-x-F-P-V. Phylogenetic trees were constructed from amino acid sequences of 38 histone H2As. The histone H2As were divided into two groups: major H2As and H2A.F/Z variants. The major histone H2A group consisted of animals, fungi, plants + green algae, and red algae H2A subgroups. The animal histone H2A subgroup was divided into vertebrates, echinoderms, nematodes, insects, and segmented worms H2As. The putative red algal histone genes, GjH2A-1 and GjH2A-2, constituted an independent lineage. This is the first report on red algal histone genes.

• Parasites, Hosts and Diseases
• /
• 제39권4호
• /
• pp.329-332
• /
• 2001

More than 1,500 clams of Corbicula fluminea, the most favorable food source of freshwater bivalves in Korea, were collected from 5 localities to examine cercarial and metacercarial infection with Echinostoma cinetorchis. Although 3 clams infected with suspicious E. cinetorchis metacercariae out of 200 specimens collected at Kangjin, Chollanam-do were detected, no cercarial and metacercarial infections with E. cinetorchis were observed in field-collected Corbicula specimens. In the susceptibility experiments with laboratory-reared clams, those infected with miracidia of E. cinetorchis did not release their cercariae up to 60 days after infection. To confirm the identity of second intermediate host of E. cinetorchis experimentally, a total of 30 clams were exposed to the cercariae from Segmentina hemisphaerula that had been infected with miracidia of E. cinetorchis. The clams were susceptible to cercariae of E. cinetorchis with an infection rate of 93.3%. Metacercariae from clams taken more than 7 days after cercarial exposure were fed to rats (S/D strain), and adult worms of E. cinetorchis, characterized by 37-38 collar spines on the head crown, were recovered from the ileocecal regions. This is the first report of C. fluminea as a possible second intermediate host of E. cinetorchis.

• Parasites, Hosts and Diseases
• /
• 제37권3호
• /
• pp.189-194
• /
• 1999

A case of human infection with Heterophyes nocens (Heterophyidae) was incidentally found in a biopsy specimen of the Meckel's diverticulum at the upper part of the small intestine. The patient was a 58-year-old man living in a rural area of Talsong-gun, Kyongsangbuk-do.He had gastrointestinal symptoms such as epigastric pain, indigestion, and abdominal discomfort for 3 months, and severe diarrhea, abdominal pain, and vomiting for about 1 month before hospitalization. Endoscopy of the upper part of the small intestine revealed a Meckel's diverticulum, and it was excised and histo-pathologically examined. Three adult flukes were incidentally found sectioned in the mucosa, and they were identified as H.nocens. The patient had a history of eating raw mullets at a fish market in Pusan 6 months ago, and the mullets were presumed to be the source of infection. This case brings a considerable interest in that specific diagnosis of heterophyid infections could be done by sectional morphology of the worms.

• Parasites, Hosts and Diseases
• /
• 제48권4호
• /
• pp.303-307
• /
• 2010

Stellantchasmus falcatus is a minute intestinal fluke in the family Heterophyidae. Metacercariae, the infective stage, were reported in a marine fish, mullet Liza subviridis, and a fresh water fish, Dermopgenus pusillus, in Thailand. Adults were found in chicks, rats, cats, and humans. Morphological studies were done for comparing Stellantchasmus sp. worms found in 2 different fish hosts; their shapes and organ arrangements were very similar except for the prepharynx length. Therefore, the present study aimed to compare their DNA fingerprints using the HAT-RAPD method for both types of Stellantchasmus and several other related species. Ten arbitrarily selected primers (OPA-04, OPA-09, OPN-02, OPN-03, OPN-09, OPN-12, OPP-11, OPR-15, OPX-13, and OPAD-01) were used. It was found that OPA-09, OPN-03, and OPAD-01 were able to generate S. falcatus specific fragments in mullets which consisted of 200, 760, and 280 bp, respectively. In addition, the results of morphologic, DNA fingerprinting, and phylogenetic analyses strongly suggest that the fresh water and marine specimens of Stellantchamus may be different species.

• 융합보안논문지
• /
• 제14권4호
• /
• pp.19-26
• /
• 2014

모바일 악성코드는 웜에 의한 전파가 대표적이며, 웜의 확산 특징을 분석하기 위한 모델링 기법들이 제시되었지만 거시적인 분석만 가능하였고 특정 바이러스, 악성코드에 대해 예측하기는 한계점이 있다. 따라서 본 논문에서는 과거의 악성코드 데이터를 활용하여 미래의 악성코드의 발생을 예측 할 수 있는 마코프 체인을 기반으로 한 예측 방법을 제시하였다. 마코프 체인 예측 모델링에 적용할 악성코드 평균값은 전체 평균값, 최근 1년 평균값, 최근 평균값(6개월)의 세 가지 범위로 분류하여 적용하였고, 적용하여 얻어진 예측 값을 비교하여 최근 평균 값(6개월)을 적용하는 것이 악성코드 예측 확률을 높일 수 있음을 확인하였다.