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This paper studies the characteristics of a micro-beam interacting with an incompressible fluid in a fluid chamber with an opening in its bottom face for fluid flow. The Euler–Bernoulli equation for transverse deformation of an elastic beam is coupled with the fundamental hydrodynamic equation, which is solved by Galerkin and separation of variables method. The 2D fluid flow assumption in Cartesian coordinate has been used. Natural frequencies and mode shapes of wet beam are calculated and compared with the dry beam. The effects of geometrical parameter changes are also computed as a benchmark for the design of the micro-pump. It is observed that fluid coupling causes a decrease for beam’s natural frequencies, especially in higher modes. Furthermore, since the results of the dry and wet beam show a small discrepancy in lower modes, the mode related to the dry beam was employed as the trial function in the forced vibration analysis of the coupled system.

Prevalence and antimicrobial susceptibility of Salmonella and Shigella spp [2] Morbidity and mortality of elderly patients with zoonotic Salmonella and Campylobacter: a population-based study [3] Polycystic ovary syndrome: Important underrecognised ... [4] Role of Salmonella Typhi Vi Antigen and Secretory Systems on Immune Response [5] The Salmonella enterica serotype Typhi regulator TviA reduces interleukin-8 production in intestinal epithelial cells by repressing flagellin secretion [6] Isolation of Salmonella typhi from high vaginal swab in a case of septic abortion [7] High prevalence of typhoidal Salmonella enterica serovars excreting food handlers in Karachi-Pakistan: a probable factor for regional typhoid endemicity [8] Prevalence of Salmonella typhi among food handlers from bukkas in Nigeria [9] Salmonella enterica Serotype Typhi Bacteremia Complicating Pregnancy in the Third Trimester [10] Evaluation of false negativity of the Widal test among culture proven typhoid fever cases [11] What proportion of Salmonella Typhi cases are detected by blood culture? A systematic literature review [12] Hematological abnormalities in patients with malaria and typhoid in Tamale Metropolis of Ghana [13] Salmonella colonies in a bone marrow filmBackgrounds & Aims Intestinal fever or typhoid fever caused by a variety of Salmonella serotypes is still one of the most important medical infections in developing countries. Hormonal changes and its inhibitory effect on the immune system in pregnant women may predispose them to various infections, including typhoid fever caused by Salmonella enterica. Gastroenteritis and septicemia caused by this bacterium can infect the placenta and fetus if they occur during pregnancy, and if not treated early, they may be associated with risks such as abortion. This report is about a pregnant woman with an infectious abortion who referred to Sarem Hospital in Tehran. Patient Information In this report, a case of abortion caused by Salmonella enterica serotype Typhi was reported in a 35-year-old pregnant woman who was admitted to a hospital in Iraq with symptoms of gastroenteritis about a month before abortion and was discharged without antibiotics. Widal serological test and blood culture of the patient were negative and the bacterium was isolated from placenta in culture. Conclusion Gastroenteritis and gastrointestinal symptoms such as diarrhea and vomiting in pregnant women, especially in the first trimester of pregnancy, should be monitored for salmonella infections, because there is a risk of infection and abortion due to infection. Serologic tests such as Widal test or a blood culture are not enough for this purpose, as false negative results are likely to occur in such cases.

Heavy metal ions (e.g. cadmium, chromium, copper, nickel, arsenic, lead, zinc) have significantly serious side effects on the human health. They can bind with proteins and enzymes, altering their activity, increasing neurotoxicity, generating reactive oxygen species (ROS), promote cellular stress and resulting in their damage. Furthermore, the size, shape and type of metal are important for considering nano-or microtoxicity. It then becomes clear that the levels of these metals in drinking water are an important issue. Herein, a new micro-mechanical sensor is proposed to detect and measure these hazardous metals. The sensor consists of a micro-beam inside a micro-container. The surface of the beam is coated with a specific protein that may bind heavy metals. The mass adsorbed is measured using the resonant frequency shift of the micro-beam. This frequency shift due to the admissible mass (which is considered acceptable for drinking water based on the World Health Organization (WHO) standard) of manganese (Mn), lead (Pb), copper (Cu) and cadmium (Cd) is investigated for the first, second and third mode, respectively. Additionally, the effects of micro-beam off-center positions inside the micro-container and the mass location are investigated.