Incidence and risk factors of bacteria causing infectious keratitis

To study the incidence and risk factors of the bacteria causing infectious keratitis among patients in Qassim province of Saudi Arabia. This is a cross sectional study conducted at the Department of Optometry, College of Applied Medical Sciences, Qassim University, Qassim, Kingdom of Saudi Arabia from December 2010 to May 2011. One hundred patients suspected of keratitis were subjected to clinical examinations. A total of 115 corneal swabs from these cases were collected under aseptic conditions for bacteriological examinations. Culture of the corneal swabs revealed Pseudomonas aeruginosa [25.2%], Staphylococcus aureus [15.7%], and unclassified bacteria [13.9%]. However, 52 swabs of infectious keratitis cases [45.2%] were negative to bacteria. Contact lens wearing [44.4%] was the most common risk factor among the examined patients, followed by corneal trauma [21.7%], ocular surface disease [11.3%], and corneal surgery [7%]. No significant correlation was observed between systemic risk factor and clinical presentation. It could be concluded that infectious keratitis was mostly due to Pseudomonas aeruginosa and Staphylococcus aureus. Therefore, strict measures are recommended to control and treat infectious keratitis to avoid visual complications

cleansing action of disinfectant solutions on acrylic denture base materials

This study compared the disinfectant action of three traditional disinfectantsolutions which were sodium chloride, hydrogen peroxide and sodiumhypochlorite on S. aureus, C. albicans and Ps. aeruginosa. Sterile acrylicresin pieces were immersed in different disinfectant solutions for 1, 3, 5minutes and over-night. The results showed that the disinfectant action ofthe three disinfectants used depend upon the concentration and time ofimmersion

Effect of denture base material on dental plaque bacterial mutation

The present study examined the effect of acrylic resin and chrome cobalt alloyon mutation of bacterial plaque both in-vivo and in- vitro. Marked changes inthe counts and species were observed with an emphasis on the control groups. Amarked mutation was observed with acrylic resin denture base, especially in theunpolished surfaces