trasal-contact method test using glass petri-dish rather than the conventional glass jar was used to evaluate the permethrin toxicity and synergism effect of piperonal butoxode (pbo) on nymphae of five strains of blattella germanica (l.). the test was carried out on 2-3 days old of first nympal stage, at four replicates of 10 cockroaches. the susceptible strain showed t50 and kt50 of 12.81 and ...

neonatal bacterial sepsis is one of the major cause of morbidity and mortality in neonates. this retrospective study was performed to determine the incidence of bacterial sepsis with focus on gram negative organisms in neonates admitted at beheshti hospital in kashan, during a 3-yr period, from september 2002 to september 2005. blood culture was performed on all neonates with risk factors or si...

abstract: this paper presents the results of pullout tests on uniaxial geogrid embedded in silica sand under monotonic and cyclic pullout forces. the new testing device as a recently developed automated pullout test device for soil-geogrid strength and deformation behavior investigation is capable of applying load/displacement controlled monotonic/cyclic forces at different rates/frequencies an...

race-specific resistance of wheat to yellow rust caused by puccinia striiformis f. sp. tritici has been reported as short-lived. partial resistance, a kind of quantitative resistance, has been reported to be more stable. partial resistance in terms of slow rusting parameters including final rust severity (frs), apparent infection rate (r), relative area under disease progress curve (raudpc), an...

helicobacter pylori is an important human pathogen and a gram-negative, spiral shaped and microaerophilic bacteria with persistence colonization in gastric mucosa, causes gastroduodenal inflammation and destruction, resulting in diseases such as duodenal ulcer disease, gastric ulcer disease. when h.pylori discovered by warren and marshall, effective therapy developed for this infection and resu...

objective(s) extensive use of quinolones has been associated with raising level of resistance. in the current, we focused on assessing the prevalence of escherichia coli resistance to quinolones and frequency of qnra, qnrb and qnrs in non esbls (extended spectrum beta-lactamases) and esbls producing e. coli with blashv and blatem. materials and methods one hundred and fifty e. coli isolates wer...

background blood infections are an extensive range of disorders that can vary from limited bacteremia to fatal septicemia. bacteremia refers to the transient presence of a bacterium in the bloodstream. a delay in the diagnosis and treatment of sepsis can cause mortality, with a 20% - 50% prevalence rate. objectives due to the changing patterns of antibiotic resistance, as well as differences in...

tuberculosis is an infectious disease caused by mycobacterium tuberculosis and is the primary cause of mortality in the world. m. tuberculosis strains are important intracellular pathogens causing infection in oxygen-rich macrophages in the lungs. the emergence of aids, declined socioeconomic standards and a lessened emphasis on tb control programs have contributed to the disease resurgence. re...

the russian wheat aphid (rwa), diuraphis noxia has been known as a major pest of small grains, particularly wheat, worldwide. this study evaluated the biological responses of rwa to six wheat cultivars including yavarus, pishgam, aadl, omid, darab 2 and sepahan. the experiment was conducted under greenhouse conditions of 25 ± 2 °c, 55 ± 10 % r. h. and a photoperiod of 16:8 (l: d) h. resistance ...