scholarly journals Gram-negative Versus Gram-positive in Primary Pyogenic Spondylitis and Analysis of Risk Factors for Relapse

2020 ◽  
Author(s):  
Guohua Dai ◽  
Shu Zhong Li ◽  
Chuqiang Yin ◽  
Yuanliang Sun ◽  
Qizun Wang ◽  
...  
Keyword(s):  
Body Temperature ◽  
Independent Risk Factor ◽  
Treatment Time ◽  
Recurrent Infection ◽  
The Body ◽  
Negative Group ◽  
Gram Positive ◽  
Gram Negative ◽  
Positive Group ◽  
Pyogenic Spondylitis

Abstract Purpose：In the present study, we aimed to compare and analyze the clinical features, diagnosis, treatment and prognosis of primary pyogenic spondylitis caused by Gram-positive and Gram-negative bacteria.Methods: A retrospective analysis consisting of 76 cases of primary pyogenic spondylitis with complete clinical information was carried out from January 2013 to January 2020 in our hospital. The patients were divided into two groups according to Gram staining: Gram-negative group (n=33) and Gram-positive group (n=43). The clinical characteristics, diagnosis, treatment and prognosis of the two groups were compared and analyzed.Results: Staphylococcus aureus accounted for the highest proportion of the Gram-positive group, while Escherichia coli accounted for the highest proportion of the Gram-negative group. Before treatment, there were no significant differences in terms of age, gender, affected segment, spinal abscess, diabetes mellitus, course of disease, admission erythrocyte sedimentation rate (ESR), admission C-reactive protein (CRP), and admission white blood cell (WBC) count between the two groups (P>0.05). After treatment, there were no statistically significant differences in discharge ESR, discharge CRP, ESR decline rate, CRP decline rate, surgery, recurrence, follow-up time, hospital stay, and body temperature ≥38℃ between the two groups (P>0.05). The body temperature of the Gram-negative group was higher compared with the Gram-positive group, and the number of patients with urinary tract infection in the Gram-negative group was significantly greater compared with the Gram-positive group (P<0.05). Antibiotic treatment time <6 weeks was an independent risk factor for recurrent infection.Conclusions: The body temperature of the Gram-negative group was higher compared with the Gram-positive group, and there were significantly more cases with urinary tract infection in the Gram-negative group compared with the Gram-positive group (P<0.05). Antibiotic treatment time <6 weeks was an independent risk factor for recurrent infection.

scholarly journals KEPEKAAN ANTIMIKROBA KULTUR DARAH DI SEPSIS NEONATAL

2016 ◽  
Vol 19 (1) ◽  
pp. 24
Author(s):  
Tajuddin Noor ◽  
Nurhayana Sennang ◽  
Benny Rusli
Keyword(s):  
Blood Culture ◽  
Staphylococcus Epidermidis ◽  
Secondary Data ◽  
Klebsiella Pneumonia ◽  
Negative Group ◽  
Gram Positive ◽  
Gram Negative ◽  
Positive Group ◽  
Antimicrobial Sensitivity ◽  
Mortality Causes

Sepsis was one of the morbidity and mortality causes in neonatal. The diagnosis and treatment requires the bacterial identification and selection of sensitive antimicrobials. The aim of this study was to know the bacterial pattern and antimicrobial sensitivity of blood culture in the suspected neonatal sepsis patients who were treated at NICU in Dr.Wahidin Sudirohusodo Hospital Makassar. A retrospective study was conducted with secondary data from the culture and antimicrobial susceptibility test between the period of June 2010−July 2011. In this present study was found that from the total 91 blood culture isolates, bacteria Gram-negative group was 85.7% and Grampositive was 14.3% and the isolate encountered in order of frequency were Alkali genes faecalis 50.5%, Klebsiella pneumonia 25.3%, and Staphylococcus epidermidis 9.9%. In the Gram-negatives group, the isolate often encountered were Alkali genes faecalis 59.0%, Klebsiella pneumonia 29.4% and Enterobacter spp 6.4% while in the Gram-positive group were found Staphylococcus epidermidis 69.2% and Staphylococcus saprophytic 23.1%. The more sensitive antimicrobal that belong to Gram-negative group were Meropenem 94.4%, Levofloxacin 92.1%, and Ceftazidime 77.0% while the more resistant were Ampicillin 94.6%, Gentamycin 89.1% and Cefuroxime 82.7%. The more sensitive antimicrobal that belong to Gram-positive group were Vancomycin and Chloramphenicol 91.7% and Novobiosin 76.9% while the more resistant were Gentamycin and Ceftriaxone 100.0% and Amoxicillin 91.7%. Based on this study it can be concluded that Gram-negative aerobe bacteria was more common than the Gram-positive one. Meropenem, Levofloxacin and Ceftazidime antimicrobal were high sensitive to Gram-negative while Vancomycin, Chloramphenicol, and Novobiocin were high sensitive to Gram-positive. The resistance of Ampicillin and Gentamycin were found in both bacterially groups of sepsis suspected neonatal patients in NICU

Fever and lethargy induced by subcutaneous pyrogen infusion in unrestrained rats

2005 ◽  
Vol 83 (11) ◽  
pp. 1007-1014 ◽  
Author(s):  
I du Plessis ◽  
D Mitchell ◽  
H P Laburn ◽  
T Cartmell
Keyword(s):  
Body Temperature ◽  
Continuous Infusion ◽  
Bolus Injection ◽  
Sickness Behavior ◽  
The Body ◽  
Voluntary Activity ◽  
Night Time ◽  
Gram Positive ◽  
Time Activity ◽  
Gram Negative

We have investigated the effects of continuous subcutaneous infusion of lipopolysaccharide (LPS), muramyldipeptide (MDP), or saline on abdominal temperature and voluntary activity in unrestrained rats. Both pyrogens were infused via osmotic pumps at a rate of ~2 µg·kg–1·min–1 for 7 d. LPS infusion evoked a 3-d and MDP a 1-d elevation in body temperature. Night-time activity was suppressed on days 1 and 2 during LPS infusion and on day 1 of MDP infusion. Body mass was significantly decreased on infusion day 4 in rats receiving either LPS or MDP; however, the rate of weight gain had been restored by day 8 (1 d after cessation of pyrogen infusion). We further tested the body temperature response of the same experimental animals to a single subcutaneous bolus injection (250 µg/kg) of the same pyrogen that had been infused for 7 d, 2 d after cessation of pyrogen infusion (day 9). The fever response in rats receiving a bolus injection of either LPS or MDP was significantly attenuated in rats that had previously been infused with the same pyrogen. These data suggest that tolerance developed to continuous infusion of both Gram-negative and Gram-positive pyrogens, and that mechanisms of tolerance development set in early during the 7-d infusion period of both pyrogens and persisted for at least 2 d after the cessation of pyrogen infusion. We propose that cytokine intermediates were involved or required in inducing these responses to continuous infusion of both LPS and MDP.Key words: lipopolysaccharide, muramyldipeptide, rats, osmotic pump, tolerance, Gram-negative, Gram-positive, sickness behavior.

scholarly journals Autoinducer 2 Signaling via the Phosphotransferase FruA Drives Galactose Utilization by Streptococcus pneumoniae , Resulting in Hypervirulence

mBio ◽  
2017 ◽  
Vol 8 (1) ◽  
Author(s):  
Claudia Trappetti ◽  
Lauren J. McAllister ◽  
Austen Chen ◽  
Hui Wang ◽  
Adrienne W. Paton ◽  
...  
Keyword(s):  
Streptococcus Pneumoniae ◽  
Quorum Sensing ◽  
Capsular Polysaccharide ◽  
The Body ◽  
Gram Negative Bacteria ◽  
Phosphotransferase System ◽  
Gram Positive ◽  
Gram Negative ◽  
Autoinducer 2 ◽  
Leloir Pathway

ABSTRACT Communication between bacterial cells is crucial for the coordination of diverse cellular processes that facilitate environmental adaptation and, in the case of pathogenic species, virulence. This is achieved by the secretion and detection of small signaling molecules called autoinducers, a process termed quorum sensing. To date, the only signaling molecule recognized by both Gram-positive and Gram-negative bacteria is autoinducer 2 (AI-2), synthesized by the metabolic enzyme LuxS ( S -ribosylhomocysteine lyase) as a by-product of the activated methyl cycle. Homologues of LuxS are ubiquitous in bacteria, suggesting a key role in interspecies, as well as intraspecies, communication. Gram-negative bacteria sense and respond to AI-2 via the Lsr ABC transporter system or by the LuxP/LuxQ phosphorelay system. However, homologues of these systems are absent from Gram-positive bacteria and the AI-2 receptor is unknown. Here we show that in the major human pathogen Streptococcus pneumoniae , sensing of exogenous AI-2 is dependent on FruA, a fructose-specific phosphoenolpyruvate-phosphotransferase system that is highly conserved in Gram-positive pathogens. Importantly, AI-2 signaling via FruA enables the bacterium to utilize galactose as a carbon source and upregulates the Leloir pathway, thereby leading to increased production of capsular polysaccharide and a hypervirulent phenotype. IMPORTANCE S. pneumoniae is a Gram-positive bacterium frequently carried asymptomatically in the human nasopharynx. However, in a proportion of cases, it can spread to other sites of the body, causing life-threatening diseases that translate into massive global morbidity and mortality. Our data show that AI-2 signaling via FruA promotes the transition of the pneumococcus from colonization to invasion by facilitating the utilization of galactose, the principal sugar available in the upper respiratory tract. AI-2-mediated upregulation of Leloir pathway enzymes results in increased production of capsular polysaccharide and hypervirulence in a murine intranasal challenge model. This identifies the highly conserved FruA phosphotransferase system as a target for new antimicrobials based on the disruption of this generic quorum-sensing system.

scholarly journals Gram Positive Bacterial Lipoteichoic Acid Role in a Root Canal Infection – A Literature Review

2021 ◽  
Author(s):  
Vinoo Subramaniam Ramachandran ◽  
Mensudar Rathakrishnan ◽  
Malathy Balaraman Ravindrran ◽  
Alargarsamy Venkatesh ◽  
Vidhya Shankari Shanmugasundaram ◽  
...  
Keyword(s):  
Cell Wall ◽  
Immune Surveillance ◽  
Lipoteichoic Acid ◽  
The Body ◽  
Gram Positive ◽  
Gram Negative ◽  
Cell Wall Components ◽  
Root Canals ◽  
Endodontic Infection ◽  
Wall Components

Bacteria and its by-products are found to be the main cause of pulpal and periapical infection of tooth. Infected root canals of tooth harbours a wide variation of microbial flora that includes both Gram-positive and Gram-negative microorganisms. Bacterial components such as Lipopolysaccharide (LPS) of gram negative bacteria and Lipoteichoic Acid (LTA) of gram positive bacteria have the potential to enter the peri-apical tissue of tooth and initiate the inflammatory process. After microbial death that occurs either due to body’s defence cells or by antibiotic action, bacterial cell wall components such as LTA are released which can persist inside macrophages for prolonged periods causing chronic inflammation. Once these cell-wall components are recognized by the body immune surveillance cells, numerous inflammatory mediators are released leading to inflammation and subsequent pathological consequences. The purpose of this review is intend to summarize the role of gram positive bacterial component LTA in causing endodontic infection and use of potential therapeutic agents against LTA.

THE STRUCTURE OF CONDITIONALLY PATHOGENIC MICROFLORA, ISOLATED FROM THE UROGENITAL TRACT OF WOMEN WITH PATHOLOGICAL COURSE OF PREGNANCY

2020 ◽  
Vol 65 (1) ◽  
pp. 50-54
Author(s):  
A. V. Kozlov ◽  
A. V. Lyamin ◽  
A. V. Zhestkov ◽  
O. A. Gusyakova ◽  
E. I. Popova ◽  
...  
Keyword(s):  
Pregnant Women ◽  
Inflammatory Diseases ◽  
The Body ◽  
Urogenital Tract ◽  
Quantitative Composition ◽  
Cervical Canal ◽  
Coagulase Negative Staphylococci ◽  
Gram Positive ◽  
Gram Negative ◽  
Staphylococcus Spp

The structure of the microflora of the urogenital tract of a woman is variable and diverse, changing its qualitative and quantitative composition can affect various physiological processes in the body of a woman, including the course of pregnancy. In this study, the results of cultures of 1415 samples of urine and cervical canal discharge of pregnant women were analyzed. Species identification was carried out by MALDI-ToF mass spectrometry using Microflex LT (Bruker) mass spectrometer. Gram-positive bacteria (69.5%) dominated the structure of the cervical canal microflora, among which Staphylococcus spp prevailed., Enterococcus spp. and Lactobacillus spp. Among gram-negative bacteria most often encountered microorganisms of the order Enterobacteriales, the predominant species among which was E. coli. Also, yeast-like fungi were isolated from the material of the cervical canal, their number was 11% of the total number of crops. Qualitative microbiological composition of urine was represented by gram-positive flora (68.7%), gram-negative flora (30.1%) and Candida fungi (1.2%). There is a significant predominance of coagulase-negative staphylococci (97.3%) over coagulase-positive (2.7%) in the structure of gram-positive microorganisms. The composition of gram-negative flora is mainly represented by bacteria of the order Enterobacteriales (71.4%). The study identified microorganisms that can cause postpartum complications and the development of inflammatory diseases of the newborn, which suggests the need for regular microbiological examination for pregnant women.

scholarly journals FURTHER OBSERVATIONS ON THE GROWTH OF BACTERIA ON MEDIA CONTAINING VARIOUS ANILIN DYES, WITH SPECIAL REFERENCE TO AN ENRICHMENT METHOD FOR TYPHOID AND PARATYPHOID BACILLI

1914 ◽  
Vol 19 (5) ◽  
pp. 501-512 ◽  
Author(s):  
Charles Krumwiede ◽  
Josephine S. Pratt
Keyword(s):  
Special Reference ◽  
Pathogenic Bacteria ◽  
Negative Group ◽  
Enrichment Method ◽  
Gram Positive ◽  
Gram Negative ◽  
Selective Action ◽  
Gram Positive Bacteria ◽  
Growth Of Bacteria

Several green dyes show a marked selective action for members of the typhoid-paratyphoid-colon group. This can be used for the enrichment of typhoid and paratyphoid bacilli present in feces. Forty dyes were tested with thirty strains covering all types of pathogenic bacteria. In general the dyes restrained the growth of the Gram-positive bacteria but had no effect on the growth of the Gram-negative group.

Prognostic value of deep sequencing method for minimal residual disease (MRD) detection in multiple myeloma.

2013 ◽  
Vol 31 (15_suppl) ◽  
pp. 8511-8511 ◽  
Author(s):  
Joaquin Martinez-Lopez ◽  
Ramon Garcia-Sanz ◽  
Francois Pepin ◽  
Rosa Ayala ◽  
Maria Angeles Montalban ◽  
...  
Keyword(s):  
Multiple Myeloma ◽  
Prognostic Value ◽  
Treatment Time ◽  
Group Versus ◽  
Response Criteria ◽  
Negative Group ◽  
Positive Group ◽  
Time Points ◽  
Diagnostic Samples

8511 Background: Most multiple myeloma (MM) patients will relapse due to persistence of residual tumor cells, or MRD. We compared the prognostic value of traditional response criteria and MRD measurement by a sequencing-based method, LymphoSIGHT, and multiparameter flow cytometry (MFC) in a cohort of 68 uniformly-treated MM patients from the Spanish Myeloma Group trials. Methods: Bone marrow samples were obtained from 68 patients at diagnostic and post-treatment time points on GEM clinical trials (GEM00 and GEM05). All patients were in CR or VGPR at the post-treatment time point. Using sequencing, we identified clonal rearrangements of immunoglobulin (IGH-VDJ, IGH-DJ, and IGK) genes in diagnostic samples. We assessed MRD in follow-up samples, analyzed concordance between sequencing and MFC MRD results, and compared the prognostic value of each method with traditional response criteria. Results: The sequencing assay detected a myeloma-specific gene rearrangement in diagnostic samples from 59 of 68 (87%) patients. We tested MRD in follow-up time points in 56 of the 59 patients. We observed high correlation between MFC and sequencing MRD results (r2=0.86), with MFC underestimating the myeloma burden (Slope=0.4). Of the 56 patients, 45 were positive by sequencing at MRD levels of 10-5 or higher and 11 were MRD negative. There was significantly improved overall survival (OS) in the MRD negative group versus the MRD positive group (median not reached vs. 86 mos, p=0.026). Similar differences were found in progression free survival. When limiting the analysis to the 35 patients in conventional CR, 24 of 35 patients were positive by sequencing at MRD levels at 10-5 and higher and 10 were MRD negative. There was significantly improved OS in the MRD negative group versus the MRD positive group (median not reached vs. 80.92 mos, p=0.041). Conclusions: Our data shows high correlation between MFC and sequencing MRD levels in MM patients. For patients in CR by traditional response criteria, the presence or absence of MRD by sequencing delineated 2 groups of patients with significantly different OS. MRD negativity by sequencing may be a better prognostic indicator than CR by traditional response criteria.

Incidence and Outcome of Bacterial Blood Stream Infections in Allotransplanted Patients: Rethinking the Role of Fluoroquinolone Prophylaxis

Blood ◽  
2016 ◽  
Vol 128 (22) ◽  
pp. 2223-2223
Author(s):  
Benedetta Rambaldi ◽  
Michele Malagola ◽  
Giuseppe Ravizzola ◽  
Giorgio Giannetta ◽  
Nicola Polverelli ◽  
...  
Keyword(s):  
Stem Cell ◽  
Peripheral Blood ◽  
Antimicrobial Prophylaxis ◽  
Blood Stream ◽  
Gram Positive ◽  
Blood Stream Infections ◽  
Hematopoietic Stem ◽  
Gram Negative ◽  
Positive Group ◽  
E Coli

Abstract Introduction. Blood stream infections (BSIs) represent a common event during allogeneic hematopoietic stem cell transplantation (allo-SCT) and are associated with high rate of mortality. Prophylaxis with fluoroquinolones is commonly adopted to prevent severe infection during the neutropenic phase. The emerging bacterial strains resistant to these antimicrobial agents could lead to change this type of approach. Patients and methods. We retrospectively analyzed positive blood cultures (BCs) from patients allotransplanted from January 2010 to December 2015 within our transplant program. Antimicrobial prophylaxis was conducted with a quinolone during the neutropenic period, acyclovir and fluconazole starting from the day prior to reinfusion until the withdrawn of immunosuppressive therapy and sulfametoxazole/trimethoprim starting from the hematological recovery. GVHD prophylaxis consisted on cyclosporine and methotrexate in all cases, with the addition of ATG in patients transplanted from matched unrelated donor (MUD) or with cord-blood (CB) units. Post-transplant cyclophosphamide was used in the setting of haploidentical donors. At fever onset, BCs were collected from peripheral blood (PB-BCs) and central venous catheter (CVC-BCs). A CVC related infection was defined when a positive CVC-BC proceeded by 2 hours the positivity of PB-BCs. CVC contamination was defined by the presence of positive CVC-BCs and negative PB-BCs. Empirical broad-spectrum antimicrobial therapy was usually conduct with a third or fourth generation cephalosporin with the addiction of a glycopeptide agent, if mucositis occurred. Results. One hundred-sixty-two patients underwent allo-SCT of whom 88 (54%) had acute leukemia (AL); 70 (43%) were transplanted in first CR or up-front; 71 (44%) received a myeloablative conditioning (MAC). The stem cell source was bone marrow (BM) in 33 (20%), peripheral blood stem cells (PBSC) in 122 (75%) and CB in 7 (5%) cases. Donors were matched related donor (MRD) in 58 (36%), MUD in 86 (53%) and alternative (haploidentical or CB) in 18 (11%) cases. The median time to positive BCs since allo-SCT was 13 days (range -4 - +1482). Eighty patients (49%) had a positive BCs, for a total of 119 samples. No difference in the clinical characteristics of patients with or without BSI was detected (Table 1). The median follow up was 399 days (range 21-2039) for the BSI positive group and 437 (range 12-2157) for the BSI negative (p=0.52). In 43 out of 80 patients with BSI (53%) we observed a correlation between the BCs and an organ involvement (mainly the lung in 34% of the cases). Seventy-seven (65%) and 42 (35%) out of 119 BCs were sustained by a Gram positive and a Gram negative agent, respectively. The distribution and the antimicrobial sensitivity of the different species is reported in Table 2. Briefly, S. epidermidis and E. coli were the most frequently isolated Gram positive and Gram negative bacteria, respectively (35% and 20%). 67% of E. coli were ESBL positive and 92% were resistant to fluoroquinolones. Moreover 40% and 90% of P. aeruginosa were resistant to carbapenems and to fluoroquinolones, respectively. Sixty (50%) and 59 (50%) out of 119 BCs were CVC-BCs and PB-BCs, respectively. Regarding positive CVC-BCs, 28 (24%) were CVC related BSIs; CVC contamination was observed in 21 cases (18%). The most common isolate from CVC-BCs was S. epidermidis, with 25 cases (21%). Forty -seven out of 80 patients (59%) in the BSI positive group and 35 out of 82 (43%) in the BSI negative group died (p=0.04). Overall, the infection-related mortality was 19% (15 cases). Species with the higher mortality rate were: P. aeruginosa (50%) and E. faecium (67%). Conclusions: Prophylaxis with fluoroquinolones predominantly selects Gram positive infections the majority of which were CVC related. Infections by Gram negative strains are frequently characterized by multi-antimicrobial agent resistance. These results urge to reconsider the antimicrobial prophylaxis strategy. Prospective surveillance of BSIs is a mainstay in the management of patients addressed to allo-SCT. Disclosures No relevant conflicts of interest to declare.

Sensitivities of Foodborne Pathogens to Pressure Changes

2006 ◽  
Vol 69 (1) ◽  
pp. 130-136 ◽  
Author(s):  
HAIQIANG CHEN ◽  
DONGSHENG GUAN ◽  
DALLAS G. HOOVER
Keyword(s):  
Foodborne Pathogens ◽  
Treatment Time ◽  
Shigella Flexneri ◽  
Gram Positive ◽  
Clear Trend ◽  
Gram Negative ◽  
Serovar Typhimurium ◽  
Ultrahigh Temperature ◽  
Pressure Resistance ◽  
Pressure Changes

Eight foodborne pathogens were suspended in ultrahigh-temperature whole milk and treated at pressure levels of 0.1 to 690 MPa at 21.5°C for 10 min. There was no clear trend in pressure resistance between gram-negative and gram-positive organisms. The order of the single strains tested, from most to least pressure sensitive, was Vibrio parahaemolyticus &lt; Yersinia enterocolitica &lt; Listeria monocytogenes &lt; Salmonella enterica serovar Typhimurium &lt; S. enterica serovar Enteritidis &lt; Escherichia coli O157:H7 ≃ Staphylococcus aureus &lt; Shigella flexneri. For each organism there existed a pressure range in which log(number of survivors) had a near linear relationship when plotted versus treatment pressure level. In this study, a decimal reduction pressure (DP) value was defined and used to measure the sensitivity of these pathogens to pressure changes. L. monocytogenes and V. parahaemolyticus were most sensitive to pressure changes, and S. flexneri was most resistant. The DP values were 16.3 MPa for L. monocytogenes, 21.7 MPa for V. parahaemolyticus, and 127.0 MPa for S. flexneri. The most pressure-resistant gram-negative bacterium, S. flexneri, and most pressure-resistant gram-positive bacterium, S. aureus, were treated at 50°C and pressures of 0.1 to 650 MPa for 10 min. High temperature considerably enhanced pressure inactivation of these two organisms and affected their sensitivities to pressure changes. The effect of treatment time on the DP values of L. monocytogenes and V. parahaemolyticus was also determined, and it was found that it did not significantly affect their DP values.

scholarly journals Clinical and Laboratory Findings of Nosocomial Sepsis in Extremely Low Birth Weight Infants According to Causative Organisms

2022 ◽  
Vol 11 (1) ◽  
pp. 260
Author(s):  
Kyung-Hee Park ◽  
Su-Jung Park ◽  
Mi-Hye Bae ◽  
Seong-Hee Jeong ◽  
Mun-Hui Jeong ◽  
...  
Keyword(s):  
Birth Weight ◽  
Low Birth Weight ◽  
Age Of Onset ◽  
Extremely Low Birth Weight ◽  
Negative Group ◽  
Gram Positive ◽  
Laboratory Findings ◽  
Gram Negative ◽  
Nosocomial Sepsis ◽  
Negative Culture

Background: nosocomial sepsis remains a significant source of morbidity and mortality in extremely low birth weight (ELBW) infants. Early and accurate diagnosis is very important, but it is difficult due to the similarities in clinical manifestation between the causative microorganisms. We tried to identify the differences between causative microorganisms in clinical and laboratory findings and to help choose antibiotics, when sepsis was suspected in ELBW infants. Methods: a retrospective study was conducted on preterm infants, born at less than 28 weeks of gestation, with a birth weight of less than 1000 g between January 2009 and December 2019. Clinical and laboratory findings of suspected sepsis, after the first 72 h of life, were assessed. We classified them into four groups according to blood culture results (gram positive, gram negative, fungal, and negative culture groups) and compared them. Results: a total of 158 patients were included after using the exclusion criteria, with 45 (29%) in the gram positive group, 35 (22%) in the gram negative group, 27 (17%) in the fungal group, and 51 (32%) in the negative culture group. There were no significant differences in mean gestational age, birth weight, and neonatal morbidities, except for the age of onset, which was earlier in the fungal group than other groups. White blood cell (WBC) counts were the highest in the gram negative group and the lowest in the fungal group. The mean platelet counts were the lowest in the fungal group. C-reactive protein (CRP) levels were the highest in the gram negative group, while glucose was the highest in the fungal group. Conclusions: in conclusion, we showed that there are some differences in laboratory findings, according to causative microorganisms in the nosocomial sepsis of ELBW infants. Increased WBC and CRP were associated with gram negative infection, while decreased platelet and glucose level were associated with fungal infection. These data may be helpful for choosing empirical antibiotics when sepsis is suspected.

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