نتایج جستجو برای: all animals were seronegative
تعداد نتایج: 4498294 فیلتر نتایج به سال:
Nineteen per cent and 32% of serologically positive sheep and goats in heartwater endemic areas of the Republic of South Africa were susceptible to challenge with, respectively, the Ball 3 and Welgevonden stocks of Cowdria ruminantium. There was good correlation between the results of the indirect fluorescent antibody test and immunity, since without exception all the seronegative animals react...
Science is the most fun when it makes things simple. And it is at the best when we find a theory that makes many previously-unrelated observations fit together like a puzzle, and which then leads to new predictions and discoveries. During the midto late 1960s, Plate-Tectonics did this in grand style for most of the Earth sciences, allowing an entire host of observations from paleontology to pet...
this thesis attempts to measure learning styles, self efficacy and intrinsic motivation as predictors of iranian ielts reading comprehension. in order to address this issue, a quantitative study was conducted on some randomly selected intact students at ferdowsi university. these two groups were assigned as they were undergraduate (ba=91) and graduate (ma =74) students; they were all aged betwe...
the present research was conducted to accomplish two purposes. firstly, it aimed to explore and describe schematic structure or what halliday and hassan (1989, p.64) have called “generic structure potential” (gsp) of american english, iranian persian and iranian english newspaper editorials within systemic functional linguistics. secondly, a quantitative cross-comparison was made to investigate...
OBJECTIVES To compare the clinical and electrophysiological features of myasthenia gravis (MG) patients with (seropositive) or without (seronegative) antibodies to acetylcholine receptor. To investigate whether antibodies to muscle specific kinase (MuSK) and ryanodine receptor (RyR) are associated with particular features. METHODS Clinical profiles and single fibre electromyography (SFEMG) in...
Feline coronavirus (FCoV) is a highly contagious virus that is ubiquitous in multicat environments and may induce oxidative stress. This virus commonly causes an asymptomatic infection, which can persist in certain individuals. Sporadically and unpredictably, FCoV infection leads to feline infectious peritonitis (FIP), a highly fatal systemic immune-mediated disease. There are no data in the ve...
this study investigated the effects of planning on second-language written production with regard to task type. the participants were 75 iranian learners of english as a foreign language attending a private foreign language institution. they were asked to complete two different types of writing tasks (expository writing task and argumentative writing task) in different planned conditions (indiv...
Background: Neuromyelitis optica spectrum disorder (NMOSD) is an autoimmune demyelinating disease in the central nervous system. Association between NMOSD and Helicobacter pylori (H. pylori) infection has been investigated, but few studies have assessed the relationship between H. pylori and seronegative AQP4-Ab NMOSD. Objectives: This study aimed to survey the association between H. pylori...
To investigate the presence of Coxiella burnetii in sheep and cattle, the two major ruminant populations of New Zealand, its seroprevalence was determined in aborting cattle and sheepdogs. These groups of animals were chosen because of their accessibility and the fact that they would be good indicators for the presence of the organism. A total of 2181 bovine and 12,556 canine samples were all s...
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