Inactivation of the mismatch repair system in Pseudomonas aeruginosa attenuates virulence but favors persistence of oropharyngeal colonization in cystic fibrosis mice.
نویسندگان
چکیده
The inactivation of the mismatch repair (MMR) system of Pseudomonas aeruginosa modestly reduced in vitro fitness, attenuated virulence in murine models of acute systemic and respiratory infections, and decreased the initial oropharyngeal colonization potential. In contrast, the inactivation of the MMR system favored long-term persistence of oropharyngeal colonization in cystic fibrosis mice. These results may help in understanding the reasons for the low and high prevalences, respectively, of hypermutable P. aeruginosa strains in acute and chronic infections.
منابع مشابه
Antibiotic Susceptibility of Pseudomonas Aeruginosa Isolated from Cystic Fibrosis Patients
Abstract Background and Objective: Cystic fibrosis (CF) is an autosomal recessive genetic disease and Pseudomonas aeruginosa is one of the most common bacteria colonized in CF patients. Growing resistance of this bacterium to antibiotics now a day is a challenge of controlling infection in CF patient. In this study colonization of CF patients with Pseudomonas aeruginosa and antibiotic suscep...
متن کاملHypersusceptibility of cystic fibrosis mice to chronic Pseudomonas aeruginosa oropharyngeal colonization and lung infection.
No transgenic cystic fibrosis (CF) mouse model developed to date mimics the major clinical phenotype found in humans with CF, chronic Pseudomonas aeruginosa lung infection. In a transgenic CF transmembrane conductance regulator (cftr) mouse colony, we found WT, heterozygous, and homozygous CF mice housed in the same cage became chronically colonized in the oropharynx with environmental P. aerug...
متن کاملGenetic Profiling of Pseudomonas aeruginosa Isolates from Iranian Patients with Cystic Fibrosis Using RAPD-PCR and PFGE
Objective(s) Pseudomonas aeruginosa is the most important cause of chronic lung infections and death in patients with cystic fibrosis. Determining the distribution of specific strains within patient populations is important in order to examine the epidemiology of the disease and the possibility of cross infection among patients. Materials and Methods Forty six Iranian patients with cystic fib...
متن کاملویژگیهای سیستم ترشحی نوع 3 در نمونههای سودوموناس ائروژینوزای جدا شده از بیماران مبتلا به سیستیک فیبروزیس
Abstract Background: Pseudomonas aeruginosalung infection is a major cause of morbidity and mortality in patients with cystic fibrosis (CF). The type III secretion system is an important and identified virulence determinant of P. aeruginosa that delivers effector proteins into targeted host cells. Three effector proteins have been described in P. aeruginosa: exoS, exoT, exoU. Unlike many studie...
متن کاملIsolation and Genetic Fingerprinting of Pseudomonas aeruginosa from Iranian Patients with Cystic Fibrosis Using RAPD-PCR
Sixty four Iranian patients with cystic fibrosis (CF) were studied for colonization with Pseudomonasaeruginosa. The patient’s age ranged between 2 months to 18 years old. Twenty one patients werecolonized, 15 with non-mucoid and 6 with mucoid strains of P. aeruginosa. The colonization rateincreased with age and the mucoid phenotype was only recovered from the older patients. A...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
- Journal of bacteriology
دوره 189 9 شماره
صفحات -
تاریخ انتشار 2007