ABSTRACT
Gastric angiodysplasia is an uncommon cause of upper gastrointestinal blood loss that may occur in the stomach or duodenum, and is responsible for up to 1~6% of upper gastrointestinal bleeding. In contrast to colonic angioectasia, gastric lesions are more common in young individuals and originate from developmental causes. On an endoscopic examination, the lesions typically show a spider-shape or coral reef-like pattern of dilated and tortuous vessels and measure approximately 2 to 10 mm in diameter. We encountered a case of huge gastric angiodysplasia that presented with overt bleeding and anemia and was successfully treated with argon plasma coagulation.
Subject(s)
Anemia , Angiodysplasia , Anthozoa , Argon Plasma Coagulation , Argon , Colon , Duodenum , Hemorrhage , StomachABSTRACT
Experimental dermatophyte infections are essential for studying dermatophytosis. Induction of standard infections depends on control of three factors-spore dose, scarification, and species of the experimental animals. The authors evaluated the three factors in the experimental infection models, which were inoculated with quantitated spore solution of N.gypsea “+” and A. benhomiae “+” in rabbit, guinea pig, rat, and mouse. The results were as follows. 1. Infection was correlated with concentration of inoculums. 2. In traumatization method, abrasion with knife was the most effective for inoculation, followed by pricking, epilation, and shaving of hair in decreasing order. 3. Rabbit and guinea pig were more susceptible to dermatophyte infection rather than the rat and mouse. However, the mouse was not infected at all. 4. Guinea pig was the proper animal model for experimental dermatophytosis in susceptibility, degree of clinical response, and duration of the infection. 5. A.benhamiae “+” showed more severe inflammation and shorter course the N.gypsea “+”.
Subject(s)
Animals , Mice , Rats , Arthrodermataceae , Guinea Pigs , Hair , Hair Removal , Inflammation , Methods , Models, Animal , Spores , TineaABSTRACT
No abstract available.
ABSTRACT
The soil bacterium Agrobacterium tumefaciens is a plant pathogen that causes crown gall tumors by infecting the wounded dicotyledonous plants and subsequent integration of bacterial DNA into plant nuclear DNA. Virulent A. tumefaciens strains harbor a large Ti (tumor–inducing) plasmid that carries genes essential for tumorigenesis. In the present study, 13 strains (Malus pumila Mill; A₁₋₃, Populus monilifera; W₁₋₆, Populus tomentiglandlosa; P₁₋₃ and Rosa species; R₁) of Agrobacterium isolated in korean crown gall tumors and plasmids were observed in 6 strains (W₂, W₃, W₆, P₁, P₃ and A₂). The test for crown gall tumor formation was resulted only in ATCC15955 and KW2 strains inoculated into the stem of sun flower and the development was observed for 4 and 6 weeks after inoculation. Above two Ti plasmids (pTi) were purified by cesium chloride-ethidium bromide density gradient centrifugation and digested with restriction enzyme and fragments of pTiATCC15955 and pTiKW₂ observed by EcoR I ; 25&27, Hind III ; 23&21, BamH I ; each 20 and Hpa I ; 12&27. And sizes of pTiATCC15955 and and pTiKW₂ calculated as 200 and 87 kbases. Octopine was isolated from tumor tissue (W₁₋₆ and P₁₋₃) and these strains confirmed as octopine type.