Two seriously neutropenic patients (a 23-year-old man with a promyelocytic acute myeloid leukemia [AML-M3] and a 77-year old male with an immature acute myeloid leukemia [AML-M1] diagnosis) with severe infections caused by Stenotrophomonas maltophilia were treated with aztreonam/clavulanic acid (2:1) combination. In the first patient the infection was caused by a multiresistant strain and in the second, by a strain with poor response to trimethoprim-sulfamethoxazole and other antimicrobial agents. After treatment with aztreonam/clavulanic acid both patients evolved favorably.
Background Infectious processes are frequent complications presented in pediatric patients with cancer. Currently, the indiscriminate use of antibiotics induces resistance to available treatments, creating the emergence of multi-drug-resistant organisms (MDROs). Due to the impact in morbidity and mortality secondary to MDRO infection, we aimed to identify risk factors associated with mortality in infections due to MDROs in pediatric patients with cancer. Methods Case–control study nested in a prospective cohort of pediatric oncology patients with febrile neutropenia (FN) at Hospital Infantil de México Federico Gómez (HIMFG) in Mexico City from March 2015 to September 2017. MDRO was defined as acquired non-susceptibility to at least one agent in three or more antimicrobial categories. Patients with FN episodes who died from an infection due to MDROs were defined as cases and patients with FN episodes of an infection due to MDROs who did not die were defined as controls. Mucositis, septic shock, PICU stay, and bacterial prophylaxis (Trimethoprim/Sulfamethoxazole) were compared between groups. Descriptive statistics was performed and Pearson χ 2 or Student’s t-test were used to compare risk factors between groups. Results A total of 929 FN episodes were documented, 44.4% episodes occurred in male patients, mean age was 7.9 years, with the population under 5 years being the most represented (68.2%). The most frequent diagnosis was acute lymphoblastic leukemia in 75% followed by rhabdomyosarcoma in 10.5% and acute myeloid leukemia in 9.6%. Prophylaxis (trimethoprim/sulfamethoxazole) was used in 86%, mucositis was present in 9.2% of episodes. 12.1% had septic shock and 4.7% were admitted to PICU. In 148 FN episodes (15.9%) a microorganism was identified, of these 50 (33.7%) were due to an MDROs. Urinary tract infection was the most frequent site (49%), followed by bloodstream infections (47%). K. pneumoniae was the most frequent MDRO in 22.8%, followed by E. coli in 19.2% and P. aeruginosa in 14%. Septic shock was presented in 26% of MDROs infections. Overall mortality was 1.94% and only 0.86% (8) were secondary to MDROs. Of patients with MDRO isolated mortality was 30% (15/50). Mortality associated with bloodstream infection due to MDROs was 25% compared with other source of MDROs infections (3%) (P = 0.01). Septic shock was present in 40% of patients with death due to MDROs infection (P = 0.001). Conclusions In our population of children with FN episodes who had an isolated microorganism, infection due to MDROs are high (33.7%) and MDROs infection-directed mortality was as high as 30%. Bloodstream infections and septic shock were risk factors associated with mortality due to MDROs.
Background Cancer is one of the leading causes of death in children in Mexico. Infections are the main cause of morbidity and mortality in these patients. Febrile neutropenia (FN) constitutes an infectious emergency and early aggressive antibiotic treatment is the standard of care. Recent guidelines suggest discontinuing empirical antibiotics in patients who have negative blood cultures at 48 hours, who have been afebrile for at least 24 hours, and who have evidence of marrow recovery. Nevertheless, recommendations about discontinuing antibiotics and discharging patients while they are still neutropenic are less clear. We aimed to evaluate the safety of early hospital discharge of FN patients who are still neutropenic. Methods Observational, case–control study nested in a prospective cohort of pediatric oncology patients with FN at Hospital Infantil de México Federico Gómez (HIMFG) in Mexico City from May 2015 to September 2017. We defined early discharge as when a patient is discharged while neutropenic (ANC <500 cell/mm3) and has completed at least 7 days of antibiotics. Patients with FN who were discharged with neutropenia were defined as cases and patients with FN who were discharged after recovering from neutropenia were controls. To assess the safety of hospital early discharge, the following outcomes were analyzed until 7 days after discharge: new onset of fever, hospital readmission, need to restart antibiotic treatment, septic shock, and death. Descriptive statistics were performed with measures of central tendency. Variables of interest were compared with Pearson’s χ 2 or Student’s test. Results In total, 929 febrile neutropenia episodes were analyzed. The mean age was 7.5 years, 55.3% were female. Hematologic malignancies were the most frequent type of malignances in 50.8%. Acute lymphoblastic leukemia (ALL) was the underlying disease in 41%. Of the 929 FN episodes, 180 (19.3%) were discharged with neutropenia. Patients with ALL were the most frequent in 49.4%, followed by acute myeloid leukemia 18.8% and rhabdomyosarcoma 6.6%. Thirty-five percent were in maintenance therapy, 22% in remission induction therapy, and 9% in consolidation. 19.4% of discharged patients received granulocyte-colony stimulating factor. Ten patients (5.5%) were re-admitted during the 7 days following discharge. Six patients returned for chemotherapy administration and one was scheduled for liver biopsy. Three patients were re-admitted due to infectious complications (1.6%), none of them were under oral antibiotic treatment; two patients due to FN without microbiological isolation and one patient with septic shock due to multi-drug-resistant Pseudomonas aeruginosa. Older patients had a higher risk of readmission, with a mean age of 14.6 years (SD 4.6 years, 95% CI 7.7–21.6) (P = 0.01), compared with the mean of 7.7 years (SD 2.7 years, (95% CI 7.0, – 8.4) of patients who were not re-admitted. Conclusions In our population of pediatric patients with FN who were discharged before neutrophil recovery, readmission due to infectious complications was low (1.6%). Discharging patients with persistent neutropenia who are afebrile and had completed a course of antibiotics seems an acceptable practice with a low risk of readmission.
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