[MGIT and other methods for diagnosing tuberculosis in a private hospital system with low incidence].

Background: Tuberculosis (TB) is still a threat to public health; in 2014 caused 1.5 million deaths worldwide; in hospitals where the prevalence of TB is low, it is appropriate to evaluate the effectiveness of tests to diagnose it.

Methods: We reviewed reports of airway clinical specimens sent for studies of tuberculosis to the microbiology laboratory from Tec Salud System private hospitals (400 beds) in the metropolitan area of ​​Monterrey, NL, from May 2012 to December 2015.

[Role of anaerobic blood culture in the simultaneous blood culture taking for the diagnosis of bacteremia].

Background: Harboring a high mortality, the incidence of sepsis is increasing; thus detection, identification and susceptibility tests of the involved microorganisms become urgent.

Methods: We reviewed the records from January 2013 until July 2014 of a total of 4110 blood culture bottles taken from adult patients in a private tertiary hospital.

Results: Growth of microorganisms was observed in 559 bottles (12.

[Necrotizing fasciitis, myositis, arthritis, and streptococcal toxic shock syndrome caused by group G Streptococcus. Report of one case].

Background: Necrotizing fasciitis (NF), myositis, and streptococcal toxic shock syndrome (STSS) associated with group G ß-hemolytic streptococcus (GGS) occasionally coincide.

Clinical Case: We describe a case of GGS simultaneously occurring with NF, myositis, arthritis, and STSS in an 83-year-old woman with sequelae of cerebrovascular disease, hospitalized after two days of fever and with a painful swollen left foot. She was hypotensive, her foot had purplish discoloration, which showed blisters spreading to the lower third of the leg, and no crepitus was present.

[Necrotizing fasciitis and group A streptococcal toxic shock syndrome in two patients without risk factors].

Necrotizing fasciitis associated to group A streptococcus (S. pyogenes) infection is a deep-seated infection of the subcutaneous tissue that results in progressive destruction of fascia and fat, with a high mortality rate due to a rapid progression of the illness to shock and multiple organ dysfunction. The challenge is to perform a prompt diagnosis because it is often confused with a minor soft-tissue infection.

[Catheter-associated bloodstream infections. Review of five-year surveillance among hospitalized patients].

Background: Catheter related infections (CRI) and bloodstream infection (BSI) associated to central venous catheter (CVC) is cause of frequent hospital-acquired infection (HAI) and a major reason of morbidity and mortality among patients and it is itself an indicator of quality health care.

Objective: To determine the incidence of CRI and BSI and to identify the hospital areas where they occurred over a five-year period.

Methods: A prospective study from 2004 to 2008 in a population of hospitalized patients who required the use of CVC was made.