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Some unusual microorganisms have been isolated from samples of patients with oral cavity periodontal disease. The objective of this research was to determine the frequency of Staphylococcus spp. in periodontal pockets based on the epidemiological characteristics of patients attending a dental center in the municipality of San Diego, Carabobo state. Samples from periodontal pockets of 50 patients attending the dental center were studied. The isolated strains were identified by biochemical tests and finally the profile of antimicrobial susceptibility was determined. It was found that the frequency of patients with Staphylococcus spp. was 32%, 16 patients. Staphylococcus Coagulase Negative (SCN) was isolated in 10 patients, followed by S. aureus in 6. Regarding to antimicrobial susceptibility profile, it was determined that of the 6 isolated strains of Staphylococcus aureus, 2 proved to be Methicillin-resistant. The presence of Staphylococcus spp. in periodontal pockets is low frequency; however in this study, the presence of said microorganism was determined in 32% of the patients studied, which means that these patients are more colonized than what is believed.

Urinary tract infections (UTI) are a common problem in medical practice, the etiology and susceptibility that produce the UTI may vary over time. It was conducted a study of no-experimental descriptive in order to detect the causative organisms of urinary tract infections and antimicrobial susceptibility in older adults residing in a health center of Carabobo state. They were evaluated 57 urine samples for bacteriological culture and the recovered microorganisms underwent susceptibility testing by disk diffusion method in agar (Kirby-Bauer). The most frequently isolated microorganisms in the ITU were Escherichia coli (53.84% and Klebsiella pneumoniae (15.40%), among others. In The antimicrobial susceptibility testing, the antibiotics that showed better antimicrobial activity were nitrofurantoin and amikacin (84.62%) each one, followed by gentamicin (76.92%) for all the Gramnegative bacilli recovered. The greater resistance was observed in ampicillin (61.54%), followed by trimethoprim-sulfamethoxazole (53.85%) and ciprofloxacin (46.15%), in enteric Gram-negative bacilli. In the present study was found a greater presence of Escherichia coli in the UTI as well as better antimicrobial activity of nitrofurantoin, amikacin and gentamicin against all the bacteria recovered.

Abstract: Urinary tract infections (UTI) are a common problem in medical practice, the etiology and susceptibility that produce the UTI may vary over time. It was conducted a study of no-experimental descriptive in order to detect the causative organisms of urinary tract infections and antimicrobial susceptibility in older adults residing in a health center of Carabobo state. They were evaluated 57 urine samples for bacteriological culture and the recovered microorganisms underwent susceptibility testing by disk diffusion method in agar (Kirby-Bauer). The most frequently isolated microorganisms in the ITU were Escherichia coli (53.84% and Klebsiella pneumoniae (15.40%), among others. In the antimicrobial susceptibility testing, the antibiotics that showed better antimicrobial activity were nitrofurantoin and amikacin (84.62%) each one, followed by gentamicin (76.92%) for all the Gramnegative bacilli recovered. The greater resistance was observed in ampicillin (61.54%), followed by trimethoprim-sulfamethoxazole (53.85%) and ciprofloxacin (46.15%), in enteric Gram-negative bacilli. In the present study was found a greater presence of Escherichia coli in the UTI as well as better antimicrobial activity of nitrofurantoin, amikacin and gentamicin against all the bacteria recovered. Resumen: Las infecciones del tracto urinario (ITU) representan un problema común en la práctica médica, la etiología y susceptibilidad que la producen pueden variar a través del tiempo. Se realizó un estudio de tipo descriptivo, no experimental con el objetivo de detectar los microorganismos causales de infecciones urinarias y susceptibilidad antimicrobiana en adultos mayores que residen en un centro de salud del Estado Carabobo. Fueron evaluadas 57 muestras de orina por cultivo bacteriológico, y a los microorganismos recuperados se les practico las pruebas de susceptibilidad por el método de difusión con discos en agar (Kirby-Bauer). Los microorganismos aislados con mayor frecuencia en las ITU fueron Escherichia coli (53,84%) y Klebsiella pneumoniae (15,40%) entre otros. En la prueba de susceptibilidad antimicrobiana, los antibióticos que mostraron mejor actividad antimicrobiana fueron nitrofurantoína y amikacina (84,62%) cada uno, seguido de gentamicina (76,92%) para todos los bacilos Gram-negativos recuperados. La mayor resistencia se observó en ampicilina (61,54%), seguido de trimetoprim-sulfametoxazol (53,85%) y ciprofloxacina (46,15%), en bacilos entéricos Gram-negativos. En el presente trabajo se encontró una mayor presencia de Escherichia coli en las ITU así como mejor actividad antimicrobiana de nitrofurantoina, amikacina y gentamicina frente a todas las bacterias recuperadas.