The microbial ecosystem in girls with clinical signs of vulvovaginitis is complex and variable, and the presence of a microorganism does not necessarily imply that it is the cause of infection. The diagnosis of vulvovaginitis in prepubertal girls requires a complex and comprehensive approach, and microbiological findings should be interpreted in the context of clinical findings.

In this paper we analyze and present some weaknesses and possible attacks on the RC4 stream cipher which were published in many journals. We review some advantages and disadvantages which come from several authors, as well as similarities and differences which can be observed in the published results. Also, we analyze the Key Scheduling Algorithm (KSA) which derives the initial state from a variable size key, and strengths and weaknesses of the RCS stream cipher. Using examples from other papers, we show that RC4 is completely insecure in a common mode of operation which is used in the widely deployed Wired Equivalent Privacy protocol (WEP, which is part of the 802.11 standard).

Staphylococcus aureus (S. aureus) is a microorganism that colonizes the skin and mucosal surfaces of healthy individuals, but it is also one of the most common causes of community-acquired and hospital infections. Nasal carriage of S. aureus represents a major risk factor for the development of infection with this bacterium. A special therapeutic problem are methicillin-resistant isolates of S. aureus (MRSA). The aim of this study was to assess the nasal carriage of S. aureus in healthy individuals in the local community, and the sensitivity of the microorganism to antibiotics. The study enrolled 56.868 healthy individuals aged 19 to 65 years, and 2.040 healthy school children aged 15 to 19 years. Specimens to be studied were obtained from anterior nares. We used the disk diffusion method (Kirby-Bauer) on Mueller-Hinton agar to assess the sensitivity of isolated S. aureus. S. aureus was isolated in 1.381 (2.34%) respondents. Positive findings were obtained in 2.33% of adult examinees, and in 2.59% of studied school children. We found a low level of susceptibility only to penicillin (5.36%). The susceptibility of S. aureus isolates to all other tested antibiotics was present in a high percentage, with the lowest percentage of susceptibility to doxycycline (71.54%) and erythromycin (86.09%). The highest percentage of susceptibility of tested isolates was reported for fusidic acid (99.27%). In relation to the total number of S. aureus isolates from nasal swabs in adults, MRSA was present in 8.96% (119 isolates), while there were 4 MRSA isolates from nasal swabs in school children. In this study, we established a low percentage of nasal carriage of S. aureus in the population of healthy individuals, but a high percentage of MRSA.

In this paper the binary locating-dominating number of convex polytopes is considered. The exact value is determined and proved for convex polytopes D n and R n , while for the convex polytopes R n , Q n and U n a tight upper bound of the locating-dominating number is presented.

In this paper, fault-tolerant metric dimension problem (FTMDP) is considered. The existing integer linear programing (ILP) formulation, from the literature is improved, using lesser number of variables and constraints. Correctness proof shows that improved linear programing formulation is equivalent to the existing one. Computational results on random graphs proposed for similar problems in the literature, clearly show the advantage of a new ILP formulation. Additionally, the exact value of fault-tolerant metric dimension of grid graphs are given and proved.

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Amoxicillin could be the therapy of choice in pediatric practice. The macrolides should not be recommended for the empirical therapy of pneumococcal respiratory tract infection in our local area.

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