lida mousavi

For two algebras $A$ and $B$, a linear map $T : A lo B$ is disjointness preserving if $x cdot y = 0$ implies $Tx cdot Ty = 0$ for all $x, y in A$ and is said Fredholm if dim(ker($T$)) i.e. the  nullity of $T$ and codim($T(E)$) i.e. the corank of $T$ are finite. We develop some results of  Fredholm linear disjointness preserving operators from $C_0(X)$ into $C_0(Y)$ for locally compact  Hausdorff spaces $X$ and $Y $in cite{JW28}, into regular Banach function algebras. In particular,  we consider weighted composition Fredholm operators as a typical example of disjointness preserving  Fredholm operators on certain regular Banach function algebras.

Aim and Background. Listeria monocytogenes is the ethiologic agent of abortion, preterm labour, neonatal septicemia and meningitis. The aim of this study was to determine the prevalence of listeriosis in aborted mothers or preterm labour. Two methods of indirect immunofluorescens (IF) and amniotic culturing also were compared. Material and Method. This is an analytical study for evaluation of laboratory tests. In this research, the blood samples were collected from mothers and their serum were tested by indirect IF for anti-listerial antibodies. Products of aborted fetus or preterm labour (amniotic fluid or a piece of placenta) were obtained as a specimen for culturing. Result. In this study, 518 mothers, 29 cases (5.59%) admitted with preterm labour, 125 cases (24.1%) with repeated abortion and 364 cases (70.31%) with first time abortion. Six cases (1.15%) had higher titer of anti-listeria antibody (1/800) in indirect IF but in 5 cases (0.96%) L.monocytogenes was detected in culture. Conclusions. Indirect IF should be confirmed by culturing of infected specimens. Determining of anti-listerial antibody in pregnant women and selection of listeriosis for antimicrobial treatment may prevent the spontaneous abortion, still birth and preterm labour. Therefore, we suggest monitoring L.monocytogenes seropositivity in pregnant women with high risk of threatened abortion, and also microbiological assessment of symptomatic women for detection of L.monocytogenes and insidious infection.

Nosocomial infections are one of the most important causes of morbidity and hospital mortality rate in hospitalized patients. The infections that are usually occur 48 to 72 hours after admission are called nosocomial infections. These infections increase the duration of hospitalization for 1-30 days. In Iran, nosocomial infections were reported in 1.9% to 25% of hospitalized patients. 

This cross sectional study was conducted among 252 medical students (80 interns and 172 externs). Questionnaires including 40 questions in the form of multiple choices were prepared and distributed randomly among medical students. The answer sheets were collected and corrected. Then, results were analysed using SPSS software. 

Totally, 33% of students had poor knowledge of nosocomial infections, while 50% and 17% had moderate and good (high) knowledge, respectively. There was no statistically significant relationship between gender and knowledge, however, extern's knowledge were significantly better than intern's.

With respect to the poor knowledge of medical students towards nosocomial infection, we suggest a course dealing with nosocomial infections for medical students.