[Urinary tract infections in children--etiologic agents and susceptibility to antibiotics].

Urinary tract infections (UTIs) are common clinical problem in pediatric hospitals. The aim of this study was to compare the incidence of UTIs during two different time periods (from February 1999 to March 2000, and from April 2000 to September 2001) in pediatric patients treated in ambulatory or hospitalized in new children hospital. The frequency of occurrence of ESBL--producing Gram-negative rods increased during second period study.

[Incidence of selected bacterial pathogens of the respiratory tract in patients with bronchial asthma].

Chronic bacterial infections intensify the reactivity of bronchi and aggravate the course and the control of asthma. They cause the disorders of both function and the structure of respiratory epithelium. Not only structural elements of bacteria but also their toxins intensify the release of mediators of the inflammatory reaction (leucotriens, histamine, IL1, IL4, IL6, IL8, TNF alpha).

[Concentration of interleukin-6 and interleukin-12 in pregnant women infected and noninfected with parvovirus B19].

The aim of the study was to pay attention to the frequency and consequences of Parvovirus B19 infection and observation of IL-6 and IL-12 concentrations in pregnant women who have or have not undergone parvovirus infection. In 32 pregnant women in their first or the next pregnancy with the imminent abortion IgM and IgG antibodies against Parvovirus B19 and serum concentrations of IL-6 and IL-12 were determined using ELISA test. Parvovirus infection was diagnosed in 14 patients, abortion occurred in 5 cases and in 1 case fetal dystrophy was found.

[Bacterial flora in pharyngitis and tonsillitis].

The aim of the study was a microbiological analysis of pharyngeal swabs obtained from 158 patients with the diagnosis of pharyngitis and purulent exudates from the tonsillar crypts of 10 patients treated for chronic purulent tonsillitis. Beta haemolytic streptococci groups A, B, C and G were isolated from 30% of the patients. The most frequently isolated were Streptococcus pyogenes--12% of patients and Streptococcus group C--10.

[A Polish multicenter survey of antimicrobial susceptibility and prevalence of beta-lactamase production among bacterial pathogens isolated from hospitalized and ambulatory patients].

The aim of the study was to establish the frequency of occurrence of bacterial pathogens with beta-lactamase activity, and pattern of resistance among aerobic and anaerobic strains isolated from: respiratory tract, urinary tract, skin and soft tissues (hospitalized patients) and throat swabs (ambulatory patients). The study was conducted in 1994 year in 6 bacteriological laboratories in four Polish towns (Warszawa, Kraków, Katowice, Gdańsk) according to the protocol. Sensitivity of bacteria was tested by the disc method on the Müeller-Hinton agar or chocolate agar according to NCCLS, activity of beta-lactamase was tested with nitrocephin.