RESUMO
AIM: Colistin resistance poses a serious clinical problem. This study aims to investigate the presence of plasmid-mediated resistance and heteroresistance among Escherichia coli (E. coli) and Klebsiella pneumoniae (K. pneumoniae) clinical isolates at intensive care units of Main Alexandria University Hospital. MATERIAL AND METHODS: Seventy colistin-resistant and 30 colistin-susceptible K. pneumoniae and E. coli isolates constituted the material of the study. The rapid polymyxin NP (Nordmann Poirel) test was performed. Heteroresistance in colistin-susceptible isolates was investigated by population analysis profile. mcr-1 and mcr-2 genes were amplified by polymerase chain reaction (PCR). RESULTS: The rapid polymyxin NP test showed 100% concordance with the results of BMD (broth microdilution method). Heteroresistance to colistin was detected in 23.3% of colistin-susceptible K. pneumoniae isolates. All colistin-resistant isolates were negative for mcr-1 and mcr-2 genes. CONCLUSIONS: The rapid polymyxin NP test is a reliable screening tool for colistin resistance, but not for heteroresistance. Other colistin resistance mechanisms should be investigated.
Assuntos
Colistina , Proteínas de Escherichia coli , Antibacterianos/farmacologia , Colistina/farmacologia , Farmacorresistência Bacteriana/genética , Escherichia coli/genética , Proteínas de Escherichia coli/genética , Humanos , Unidades de Terapia Intensiva , Klebsiella pneumoniae/genética , Testes de Sensibilidade Microbiana , PolimixinasRESUMO
This study was designed to estimate interferon-gamma (INF-gamma) levels among polytransfused haematology cases. Cases were selected from the haematology unit of Alexandria main university hospital, Egypt. Complete blood counts, estimation of INF-gamma and hepatitis B and C virus (HBV and HCV) status were conducted on 20 unsplenectomized patients with gamma-thalassaemia major and 20 patients with acute myeloid leukaemia (AML) in the maintenance phase and 20 healthy subjects. Mean haemoglobin levels and red blood cell counts were significantly higher in the control group than the AML and thalassaemia groups, while white blood cell counts were significantly lower in the control group than the case groups. Two AML patients (10%) and 1 thalassaemia patient (5%) were HBV-positive, while 5% of both case groups were HCV-positive. Mean values of INF-gamma were significantly different between AML, thalassaemia major and control groups: 5517 (SD 1142) pg/mL, 1024 (SD 249) pg/mL and 2980 (SD 604) pg/mL respectively.
Assuntos
Transfusão de Sangue/estatística & dados numéricos , Interferon gama/sangue , Leucemia Mieloide Aguda/sangue , Talassemia beta/sangue , Estudos de Casos e Controles , Egito , Contagem de Eritrócitos , Hemoglobinas/análise , Hepacivirus/isolamento & purificação , Vírus da Hepatite B/isolamento & purificação , Humanos , Leucemia Mieloide Aguda/terapia , Contagem de Leucócitos , Reação Transfusional , Talassemia beta/terapiaRESUMO
This study was designed to estimate interferon-gamma [INF-gamma] levels among polytransfused haematology cases. Cases were selected from the haematology unit of Alexandria main university hospital, Egypt. Complete blood counts, estimation of INF-gamma and hepatitis B and C virus [HBV and HCV] status were conducted on 20 unsplenectomized patients with thalassaemia major and 20 patients with acute myeloid leukaemia [AML] in the maintenance phase and 20 healthy subjects. Mean haemoglobin levels and red blood cell counts were significantly higher in the control group than the AML and thalassaemia groups, while white blood cell counts were significantly lower in the control group than the case groups. Two AML patients [10%] and 1 thalassaemia patient [5%] were HBV-positive, while 5% of both case groups were HCV-positive. Mean values of INF-? were significantly different between AML, thalassaemia major and control groups: 5517 [SD 1142] pg/mL, 1024 [SD 249] pg/mL and 2980 [SD 604] pg/mL respectively
Assuntos
Transfusão de Sangue , Contagem de Células Sanguíneas , Vírus da Hepatite B , Hepacivirus , Talassemia beta , Leucemia Mieloide Aguda , Hemoglobinas , Interferon gamaRESUMO
There is an interest in the use of IL-12 as a possible anti-cancer drug to induce immune responses and anti-IL-13 formulations to treat the undesirable effects of IL-13. Thus, the present study aimed at analyzing IL-12 and IL-13 profiles, viral hepatitis serology and blood cultures in acute myeloid leukemia (AML) patients. Forty individuals (20 without septicemia - Group A, and 20 with septicemia - Group B) and 20 healthy controls were evaluated. Hepatitis B virus antigens (HBsAg) and hepatitis C virus antibodies (HCV Ab) were quantified using commercial ELISA kits. IL-12 and IL-13 levels were estimated in culture supernatant of mitogen-stimulated peripheral blood mononuclear cells by ELISA. Significantly low IL-12 values were observed among AML patients compared to controls whereas the opposite was observed regarding IL-13. IL-12 levels were found to be elevated in the follow-up cases. M4 and M5 subtypes of AML presented higher IL-12 levels than M1 and M2 subtypes. The isolated organisms from AML with septicemia were Staphylococcus aureus (35 percent), Esherichia coli (25 percent), coagulase-negative staphylococci (25 percent), and Candida (15 percent). Fungemia cases showed higher IL-12 values than bacteremia cases. In conclusion, IL-12 and IL-13 should be further tested in large-scale studies to provide future immunotherapy against AML.(AU)
