Rev Esp Quimioter 2016, 29(2):91-98

Changes in the epidemiology of gastroenteritis caused by Salmonella during 2005-2014 in Salamanca, Spain    

                        

OLAIA CORES-CALVO, LUIS FÉLIX VALERO-JUAN, ENRIQUE GARCÍA-SÁNCHEZ, JOSÉ ELÍAS GARCÍA-SÁNCHEZ, MARÍA INMACULADA GARCÍA-GARCÍA             

Background. In Spain there are not many updated population studies about salmonellosis, despite being one of the most common etiologies of acute gastroenteritis (AGEs) caused by bacteria in the world. The aim of the study was to know the most relevant epidemiological features of AGEs produced by Salmonella spp. between 2005 and 2014 in Salamanca (Spain).
Methods. Descriptive cross-sectional study carried out through review of the clinical microbiologic records at Complejo Asistencial Universitario de Salamanca. Culture, isolation, identification and serotyping were performed according to standard methodology.
Results. Salmonella was isolated in 1,477 patients, representing 47.7% of all positive stool cultures and 53.3% of all income bacterial AGE. The average prevalence was 42.1 cases/100,000 people per year. The mean age was 23 ± 28 years and the median 7 years. 40.2% of all isolates occurred in children under 5 years, with an average prevalence of 45.1 cases/ 10,000 people per year. Overall, the most frequently isolated serotype was S. Typhimurium with 57%, followed by S. Enteritidis with 35.8%.
Conclusions. The prevalence of Salmonella decreased over time. The group aged 0-4 years had the highest rate throughout the period. However, Salmonella produced the highest percentage of hospitalizations for bacterial AGE. In recent years, S. Typhimurium serotype has replaced S. Enteritidis serotype and predominates in younger patients. It is observed under-reporting of cases of salmonellosis produced in Salamanca despite being mandatory notification of these since 2007.

Rev Esp Quimioter 2016; 29(2):91-98 [pdf]

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Rev Esp Quimioter 2016, 29(2):55-68

Current status in outpatient parenteral antimicrobial therapy: a practical view  

                    
FRANCISCO JAVIER CANDEL, AGUSTÍN JULIÁN-JIMÉNEZ, JUAN GONZÁLEZ-DEL CASTILLO             

Outpatient parenteral antimicrobial therapy (OPAT) programs are a current and widely spread trend in clinical practice because of it´s a cost-effective option, it´s associated with a greater comfort for the patient, a lower risk of nosocomial complications and an important cost saving for the health care system. OPAT is used for treating a wide range of infections, including skin and soft tissue infections, osteoarticular infections, bacteraemia, endocarditis and complex intra-abdominal and urinary tract infections, even in presence of multiresistant microorganisms. Correct choice of antimicrobial agent and adequate patient selection are crucial for reaching therapeutic success and avoiding readmissions, treatment prolongation or treatment-related toxicity. The optimal antimicrobial for OPAT must be highly effective, have a long half-life and an adequate spectrum of action. Ceftriaxone and teicoplanin are currently the most prescribed antibiotics for OPAT, though daptomycin and ertapenem are also on the rise, due to their high efficiency, safety and wide spectrum of action. Antibiotics that are stable at room temperature can be administered through a continuous perfusion, though self-administration is preferable although it requires training of the patient or the caregiver. Factors that are most frequently associated with OPAT failure include advanced age, recent hospitalization and isolation of multiresistant microorganisms.

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Rev Esp Quimioter 2016, 29(3):113-118

Bacteriobilia: a non-resolved problem  

                    
CARLOS ARMIÑANZAS, LUIS ANTONIO HERRERA, MARÍA CARMEN FARIÑAS             

Bile duct is usually sterile, and the isolating of microorganisms (bacteriobilia) has been related to some factors, such as age, biliary drainage before pancreatic surgery or bile duct stones. Gramnegative strains remain the most frequent pathogens, especially Escherichia coli. Among grampositives Enterococcus spp should be mentioned.
Currently, there is controversy about whether the presence of bacteriobilia has an impact on unfavorable outcome of biliary disease or surgical procedures or mortality rates, with complications such as surgical site infections or bacteremia.
In high-risk patients, such as immunosuppressed or those underwent pancreaticoduodenectomy, bile duct cultures performed routinely, even if there are not clinical data of infection, could be necessary in order to start antibiotic treatment or to reduce its spectrum.

Rev Esp Quimioter 2016; 29(3):113-118 [pdf]

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Rev Esp Quimioter 2016, 29(3):123-129

Role of bacteriobilia in postoperative complications  

                    
CARLOS ARMIÑANZAS, TERESA TIGERA, DIEGO FERRER, JORGE CALVO, LUIS ANTONIO HERRERA, MARCOS PAJARÓN, MANUEL GÓMEZ-FLEITAS, MARÍA CARMEN FARIÑAS             

Introduction. At present there is a controversy regarding the impact of positive bile cultures on morbidity and mortality rates, and on the incidence of readmissions in patients with biliar disease. The aim of this study was to evaluate the role of bacteriobilia in postoperatory infections, mortality or readmissions in these patients.
Methods. The information was obtained from all patients with bile cultures admitted to Hospital Universitario Marqués de Valdecilla (Santander, Spain) from January to December 2011. Clinical, epidemiological and microbiological data and laboratory findings were analyzed. The patients were followed for two years.
Results. One hundred and fifty-two patients (65% men) were included. Mean age was 67 years (SD= 15 years). The most frequent diagnoses were acute cholecystitis (79%) and cholangitis (8%). Laparoscopic cholecystectomy was performed in 42% of patients, open cholecystectomy in 45% and percutaneous cholecystostomy in 8%. Bacteriobilia was present in 83 patients (55%). The most frecuent microorganisms isolated were Escherichia coli (31%), Enterococcus faecium (13%) and Klebsiella pneumoniae (13%). The initial antimicrobial agent was a carbapenem in 62 patients (44%) and piperacillin-tazobactam in 28 (18%). There were 39 postoperative infections (26%), 21 readmissions (14%) and 17 patients died during admission (11%). The presence of microorganisms in bile cultures was not a statistically significant predictor of neither complications nor readmissions.
Conclusions. Intra-operative bile cultures would allow guide early appropriate antibiotic treatment use in case of infection, or empiric antimicrobial therapy, however there was no correlation between bacteriobilia and postoperative infections, length of stay, mortality or readmissions.

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Rev Esp Quimioter 2016, 29(3):155-158

Clinical interest of Streptococcus bovis isolates in urine 

                    
JAVIER DE TERESA-ALGUACIL, MIGUEL GUTIÉRREZ-SOTO, JAVIER RODRÍGUEZ-GRANGER, ANTONIO OSUNA-ORTEGA, JOSÉ MARÍA NAVARRO-MARÍ, JOSÉ GUTIÉRREZ-FERNÁNDEZ             

Introduction. Streptococcus bovis includes variants related to colorectal cancer and non-urinary infections. Its role as urinary pathogen is unknown. Our objective was to assess the presence of urinary infection by S. bovis, analysing the patients and subsequent clinical course.
Material and Methods. Observational study, with longitudinal data collection, performed at our centre between all the cultures requested between February and April 2015. Clinical course of the patients and response to treatment were analysed.
Results. Two thousand five hundred and twenty urine cultures were analysed, of which 831 (33%) had a significant microbial count. S. bovis was isolated in 8 patients (0.96%). In 75% of these cases the urine culture was requested because of urinary tract infection symptoms; the remaining 25% because of fever of uncertain source; during the follow-up period no evidence of cancer or endocarditis was detected. S. gallolyticus subspecie pasteurianus was the only variant observed (100%). The clinical response to initial treatment was favourable in all cases.
Conclusions. S. bovis bacteriuria may have clinical significance, especially when S. gallolyticus subspecies pasteurianus is isolated in cases with underlying urinary tract disease.

Rev Esp Quimioter 2016; 29(3):155-158 [pdf]

 

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Rev Esp Quimioter 2016,29(1):32-39

Intraabdominal candidiasis in surgical ICU patients treated with anidulafungin: A multicenter retrospective study     

                        
EMILIO MASEDA, MARTA RODRÍGUEZ-MANZANEQUE, DAVID DOMINGUEZ, MATILDE GONZÁLEZ-SERRANO, LORENA MOURIZ, JULIÁN ÁLVAREZ-ESCUDERO, NAZARIO OJEDA, PURIFICACIÓN SANCHEZ-ZAMORA, JUAN-JOSÉ GRANIZO, MARÍA-JOSÉ GIMÉNEZ, ON BEHALF OF THE PERI-OPERATIVE INFECTION WORKING GROUP OF THE SPANISH SOCIETY OF ANESTHESIOLOGY AND CRITICAL CARE              

Introduction. Patients with recent intraabdominal events are at uniquely risk for intraabdominal candidiasis (IAC). Candida peritonitis is a frequent and life-threatening complication in surgically ill patients. International guidelines do not specifically address IAC. This study describes clinical features of IAC in critical patients treated with anidulafungin in Surgical ICUs (SICUs).
Material and methods. A practice-based retrospective study was performed including all adults with IAC admitted to 19 SICUs for ≥24h treated with anidulafungin. IAC was documented (Candida isolation from blood/peritoneal fluid/abscess fluid and/or histopathological confirmation) or presumptive (host factors plus clinical criteria without mycological support). Total population and the subgroup of septic shock patients were analyzed.
Results. One hundred and thirty nine patients were included, 94 (67.6%) with septic shock, 112 (86.2%) after urgent surgery. Of them, 77.7% presented peritonitis and 21.6% only intraabdominal abscesses. Among 56.8% cases with documented IAC, C. albicans (52.8%) followed by C. glabrata (27.8%) were the most frequent species. Anidulafungin was primarily used as empirical therapy (59.7%), microbiologically directed (20.9%) and anticipated therapy (15.8%). Favourable response was 79.1% (76.6% among patients with septic shock). Intra-SICU mortality was 25.9% (28.7% among patients with septic shock).
Conclusions. Among IACs managed at SICUs, peritonitis was the main presentation, with high percentage of patients presenting septic shock. C. albicans followed by C. glabrata were the main responsible species. Anidulafungin treatment was mostly empirical followed by microbiologically directed therapy, with a favourable safety profile, even among patients with septic shock.

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Rev Esp Quimioter 2016, 29(3):146-150

Uropathogen pattern and antimicrobial susceptibility in positive urinary cultures isolates from paediatric patients   

                    
VANESSA MOYA-DIONISIO, MIKEL DÍAZ-ZABALA, ALEIDA IBÁÑEZ-FERNÁNDEZ, PILAR SUÁREZ-LEIVA, VENANCIO MARTÍNEZ-SUÁREZ, FLOR ÁNGEL ORDÓÑEZ-ÁLVAREZ, FERNANDO SANTOS- RODRÍGUEZ             

Introduction. Knowledge of urophatogens and antibiotic susceptibility should be used to assist with empirical urinary tract infection treatment.
Material and methods. We retrospectively analysed local bacterial pattern and antimicrobial susceptibility in positive urinary isolates from paediatric patients collected in the period 2009-2013. Results were compared with a previous study carried out in the same sanitary area between 1995 and 1999.
Results. We identified 2,762 urinary isolates. Escherichia coli was the most common uropathogen (58.9%), followed by Enterococcus sp. (11.6%) and Proteus mirabilis (10.9%). More than 95% of non extended-spectrum beta-lactamase (ESBL)-producing E. coli were susceptible to nitrofurantoin, fosfomycin, cefotaxime and aminoglycosides. However, 56%, 49%, and 22% of the E. coli isolates were resistant to ampicillin, oral first-generation cephalosporins, and trimethoprim-sulfamethoxazole, respectively. Ampicillin and amoxicillin-clavulanate were the most effective antibiotics to treat Enterococcus sp. and P. mirabilis, respectively. Not significant modifications were found compared to results published at the same area in the ‘90s.
Conclusions.  E. coli was the mostly isolated uropathogen, with a high percentage of resistance to ampicillin, oral first-generation cephalosporins, and trimethoprim-sulfamethoxazole. These urinary isolates and antimicrobial susceptibility patterns were similar to those reported in other paediatric studies and did not show significant changes compared to local previously published results. Thus, it can be considered that the current recommendations about empiric antibiotic therapy in paediatric urinary tract infections remain applicable nowadays.

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Rev Esp Quimioter 2016, 29(3):119-122

An antimicrobial stewardship program reduces antimicrobial therapy duration and hospital stay in surgical wards   

                    
ROBERT GÜERRI-FERNÁNDEZ, JUDIT VILLAR-GARCÍA, SABINA HERRERA-FERNÁNDEZ, MARTA TRENCHS-RODRÍGUEZ, JORDI FERNÁNDEZ-MORATO, LUCÍA MORO, JOAN SANCHO, LUIS GRANDE, ALBERT CLARÁ, SANTIAGO GRAU, JUAN PABLO HORCAJADA             

An antimicrobial stewardship program reduces antimicrobial therapy duration and hospital stay in surgical wardsWe report a quasi-experimental study of the implementation of an antimicrobial stewardship program in two surgical wards, with a pre-intervention period with just assessment of prescription and an intervention period with a prospective audit on antibiotic prescription model. There was a significant reduction of length of stay and the total days of antimicrobial administration. There were no differences in mortality between groups. The antimicrobial stewardship program led to the early detection of inappropriate empirical antibiotic treatment and was associated with a significant reduction in length of stay and the total duration of antimicrobial therapy.

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Rev Esp Quimioter 2016, 29(3):151-154

Identification and in vitro antifungal susceptibility of vaginal Candida spp. isolates to fluconazole, clotrimazole, and nystatin   

                    
MARIA CRISTINA DIAZ, ROSSANNA CAMPONOVO, INGRID ARAYA, ANN CERDA, MARÍA PAOLA SANTANDER, ALFONSO-JAVIER CARRILLO-MUÑOZ             

Objective. The aim of this study was to identify and determine the in vitro antifungal susceptibility testing to clotrimazole, fluconazole, and nystatin of 145 clinical isolates of Candida spp.
Material and methods. M27-A3 microdilution method was used to determine minimal inhibitory concentrations (MIC) and partial MICs (MIC50 and MIC90) of drugs. A total of 145 isolates were studied, 126 were C. albicans, 16 C. glabrata, 2 C. parapsilosis y 1 C. tropicalis.
Results. MIC50 and MIC90 for FLZ against C. albicans were 0.25 mg/L and 1 mg/L respectively and for C. glabrata was achieved at 8 mg/L and 16 mg/L for fluconazole. Five isolates of C. albicans and one isolate of C. tropicalis were in vitro resistant to fluconazole (M27-S4). In C. albicans MIC50 and MIC90 for clotrimazole were of 0.03 mg/L and 0.06 mg/L, respectively. These values for C. glabrata were 0.25 mg/L and 1 mg/L, respectively. Five C. glabrata and 1 C. tropicalis were in vitro resistant to clotrimazole. MIC50 and MIC90 of nystatin were of 1 mg/L and 2 mg/L, respectively for C. albicans and C. glabrata.
Conclusion. In this study, C. albicans is the most frequently isolated yeast, followed by C. glabrata. The antifungals tested were found to be in vitro active for the isolates, except for 6 isolates for fluconazole and 6 to clotrimazole.

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Rev Esp Quimioter 2016, 29(4):175-182

How should we approach Aspergillus in lung secretions of patients with COPD?   

                    

JOSÉ BARBERÁN, FRANCISCO JAVIER CANDEL, ANA ARRIBI             

Aspergillus spp. is frequently isolated in respiratory samples from patients with severe COPD; however, the clinical significance of this mold is unclear and its presence may indicate temporary passage, benign chronic carriage, or onset of invasive disease. The definitive diagnosis of pulmonary aspergillosis in COPD patients is often difficult owing to the lack of specific clinical and radiological signs. However, retrospective studies show the risk for developing pulmonary aspergillosis in older patients with severe COPD, and a high number of comorbidities who have received treatment with corticosteroids and/or broad spectrum antibioties. The development of algorithms based on microbiological and radiological data and risk factors for pulmonary aspergillosis can help to differentiate between colonization and infection.

Rev Esp Quimioter 2016; 29(4):175-182 [pdf]

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