scholarly journals Correlation Between Time to Positivity Blood Culture and Procalcitonin on Bacteremia Patient

2019 ◽  
Vol 25 (3) ◽  
pp. 283
Author(s):  
Nelly Elfrida Samosir ◽  
Ricke Loesnihari ◽  
Adi Koesoema Aman
Keyword(s):  
Blood Culture ◽  
Clinical Pathology ◽  
Gram Negative Bacteria ◽  
Initial Amount ◽  
Gram Positive ◽  
Cross Sectional ◽  
Gram Negative ◽  
Gram Positive Bacteria ◽  
Time To Positivity ◽  
Clinical Conditions

IntroductionBacteremia causes a high mortality rate. Detection of bacteremia is needed as quickly as possible. The gold standard for bacteremia is blood culture which takes between 24-48 hours. Procalcitonin (PCT) is a marker of infection that is caused by bacteria that can be detected quickly in 2-6 hours. Time to positivity (TTP) blood culture is affected by the initial amount of bacteria and the addition of procalcitonin stimulated by bacteria that causes bacteremia where short TTP and high PCT show bad clinical conditions. Materials and MethodsAnalitical cross sectional research on patients with bacteremia. Fourty six bacteremia cases become the sample of research. Time to Positivity is calculated with Bactec 9050 and Procalcitonin is analyzed with mini VIDAS B.R.A.H.M.S. Examination is conducted in Department of Clinical Pathology FK-USU/ Installation of Clinical Pathology of RSUP H. Adam Malik, Medan, June – October 2016. ResultsThere was significant correlation between Time to Positivity blood culture and procalcitonin on bacteremia patients (p<0.05). There was no significant correlation between Time to Positivity and procalcitonin on bacteremia which was caused by gram-positive bacteria or gram-negative bacteria (p>0.05). Procalcitonin was significantly higher on bacteremia which was caused by gram-negative bacteria compared to gram-positive bacteria (p<0.05). ConclusionThere was significant correlation between Time to Positivity blood culture and procalcitonin on bacteremia patients. Significantly higher levels of procalcitonin in cases of bacteremia are more likely to be caused by Gram-negative bacteria than Gram-positive bacteria

scholarly journals Evaluation of Verigene Blood Culture Test Systems for Rapid Identification of Positive Blood Cultures

2016 ◽  
Vol 2016 ◽  
pp. 1-6 ◽  
Author(s):  
Jae-Seok Kim ◽  
Go-Eun Kang ◽  
Han-Sung Kim ◽  
Hyun Soo Kim ◽  
Wonkeun Song ◽  
...  
Keyword(s):  
Blood Culture ◽  
Resistance Genes ◽  
Rapid Identification ◽  
Blood Cultures ◽  
Gram Negative Bacteria ◽  
Gram Positive ◽  
Single Strain ◽  
Gram Negative ◽  
Gram Positive Bacteria ◽  
Susceptibility Tests

The performance of molecular tests using the Verigene Gram-Positive and Gram-Negative Blood Culture nucleic acid tests (BC-GP and BC-GN, resp.; Naosphere, Northbrook, IL, USA) was evaluated for the identification of microorganisms detected from blood cultures. Ninety-nine blood cultures containing Gram-positive bacteria and 150 containing Gram-negative bacteria were analyzed using the BC-GP and BC-GN assays, respectively. Blood cultures were performed using the Bactec blood culture system (BD Diagnostic Systems, Franklin Lakes, NJ, USA) and conventional identification and antibiotic-susceptibility tests were performed using a MicroScan system (Siemens, West Sacramento, CA, USA). When a single strain of bacteria was isolated from the blood culture, Verigene assays correctly identified 97.9% (94/96) of Gram-positive bacteria and 93.8% (137/146) of Gram-negative bacteria. Resistance genesmecAandvanAwere correctly detected by the BC-GP assay, while the extended-spectrumβ-lactamase CTX-M and the carbapenemase OXA resistance gene were detected from 30 cases cultures by the BC-GN assay. The BC-GP and BC-GN assays showed high agreement with conventional identification and susceptibility tests. These tests are useful for rapid identification of microorganisms and the detection of clinically important resistance genes from positive Bactec blood cultures.

scholarly journals Incidence of secondary blood stream infections in Covid 19 (SARS-nCoV II.) patients

2021 ◽  
Vol 8 (2) ◽  
pp. 128-131
Author(s):  
Asmabanu Shaikh ◽  
Rachana Patel ◽  
Anant Marathe
Keyword(s):  
Blood Culture ◽  
Blood Stream ◽  
Blood Cultures ◽  
Automated System ◽  
Empiric Antibiotic Therapy ◽  
Gram Negative Bacteria ◽  
Gram Positive ◽  
Blood Stream Infections ◽  
Gram Negative ◽  
Gram Positive Bacteria

The symptomatology and severity of covid-19 ranges widely depending on stage of infection. Most of the patients with mild to moderate disease can be managed without hospitalization. The patients with risk factors are likely to progress to severe disease. Patients developing secondary blood stream infections require longer hospital stay and are likely to develop fatal disease. The antibiotic selection is key to successful treatment of secondary BSI. This is cross-sectional study of 166 COVID 19 patients admitted to ICU of Parul Sevashram Hospital who developed sepsis like syndrome and were subjected to blood culture.Blood cultures were performed of all the patients developing sepsis like syndrome. IDSA guidelines were followed during blood collection for culture. Blood cultures were monitored on automated blood culture system. ID and susceptibility of all the isolates were performed on automated system (VITEK 2).A total of 1915 patients were reported RT-PCR positive for SARS nCoV2 during the period of 1st March2020 to 30 October 2020. 452 patients needed hospitalization based on their Oxygen saturation and co-morbidities. Out of 452, 166 patients developed sepsis like syndrome and were subjected to blood culture. The Blood culture positivity was 37/166 (22.28%). Gram positive bacteria were found in 48.64% while gram negative bacteria were 43.24%. The Enterococcus was the most common Gram positive bacterial isolates in patients. Candida was isolated in 2/37 positive blood cultures. Gram negative bacteria were isolated mostly amongst those patients who were on Ventilator. Most of the Gram positive bacteria were sensitive to Clindamycin, Linezolid, Vancomycin, Daptomycin and Teicoplanin.The incidence rate of BSI was high. Early secondary blood stream infections were mostly endogenous. Enterococcus was the most common amongst Gram positive bacteria. Gram negative secondary bacterial infections were more common with patients on ventilator. The susceptibility pattern would help in decision making of empiric antibiotic therapy. Interestingly as described by some authors earlier the relationship between SARS nCoV 2 and Enterococci needs to be studied further.

scholarly journals Bacterial etiology and antibiotic resistance pattern of neonatal sepsis: a study in a tertiary care hospital, in Bangladesh

2019 ◽  
Vol 6 (5) ◽  
pp. 1839
Author(s):  
Mahfuza Shirin ◽  
M. Monir Hossain ◽  
Manifa Afrin ◽  
Mohammad Abdullah Al Mamun
Keyword(s):  
Neonatal Sepsis ◽  
Tertiary Care ◽  
Resistance Pattern ◽  
Gram Negative Bacteria ◽  
Care Hospital ◽  
Gram Positive ◽  
Cross Sectional ◽  
Gram Negative ◽  
Mortality And Morbidity ◽  
Gram Positive Bacteria

Background: Neonatal sepsis is a leading cause of neonatal mortality and morbidity. The objective of the study was to detect causative microorganisms of neonatal sepsis and their antimicrobial resistance patterns.Methods: This prospective cross-sectional study was conducted from July 2017 to June 2018 in the Department of Neonatal Medicine and NICU of Dhaka Shishu (Children) Hospital (DSH). Neonates diagnosed with probable sepsis were studied. After enrollment, 1 mL blood was taken and sent to Microbiology department of DSH for culture and sensitivity. With baseline characteristics, clinical examination findings and outcome, were also recorded.Results: Rate of isolation of single organism was 9.2% (84/913). Out of 84 isolates, gram negative bacteria were 77.4% with Klebsiella pneumonae being the commonest (35, 41.7%), gram positive bacteria were 11.9% with Staphylococcus aureus and Streptococcus were equal (5, 5.95% each) and the remaining (9, 10.7%) isolated organism was Candida. Most of the isolated gram-negative bacteria were resistant to ampicillin, gentamicin, and ceftazidime; but gram-positive bacteria preserved 20-80% sensitivity. Klebsiella was more resistant than Acinetobacter to amikacin, netilmicin, ciprofloxacin and levofloxacin. Around 45-65% of gram-negative bacteria were resistant to imipenem and meropenem but gram-positive bacteria showed lesser resistance. Among the gram-negative bacteria, Klebsiella and Acinetobacter were resistant to piperacillin as same as carbapenem group, but gram-positive bacteria were 100% sensitive to piperacillin. All the gram-negative bacteria showed more resistance to 4th generation cephalosporin, cefepime than carbapenem. Out of culture positive 84 neonates, 63 (75.0%) were cured but 21 (25.0%) died. Among the 21 expired neonates, 47.6% (10/21) were infected with Klebsiella.Conclusion: This study observed that gram-negative bacteria causing neonatal sepsis predominantly, with emergence of Candida. All the isolated gram-positive and gram-negative organisms were mostly resistant to available antibiotics

scholarly journals IDENTIFIKASI BAKTERI PADA DEPOT AIR MINUM ISI ULANG DI KOTA MANADO

2014 ◽  
Vol 2 (2) ◽  
Author(s):  
Perisai P. Rumondor ◽  
John Porotu’o ◽  
Olivia Waworuntu
Keyword(s):  
Drinking Water ◽  
Bacillus Subtilis ◽  
Enterobacter Cloacae ◽  
Gram Negative Bacteria ◽  
Enterobacter Agglomerans ◽  
Proteus Vulgaris ◽  
Gram Positive ◽  
Cross Sectional ◽  
Gram Negative ◽  
Gram Positive Bacteria

Abstract: Water is a chemical compound that has a very important role for the life of humans and other living creatures but also serve as a medium of transmission of diseases. Refillable drinking water has become a common choice for the people in Indonesia, including in the city of Manado. One of the diseases caused by drinking poor quality water is diarrhea. To determine the condition of the contaminated refillable drinking water, a research or clinical testing in the laboratory is needed. The purpose of this research was to determine the pattern of bacteria in refillable drinking water. This study uses a descriptive research method with a cross sectional approach. Samples were taken from 20 refillable drinking water depots in Manado city that have met the inclusion criteria. Identification of bacteria performed with the culture medium. The results showed 4 samples contained gram positive bacteria, 5 samples contained gram negative bacteria and 11 samples contained a mixture of gram positive and gram negative. Gram positive bacteria consists of three species which are Bacillus subtilis (14 samples; 42,42%), Streptococcus spp. (1 sample; 3,03%) and Staphylococcus spp. (1 sample; 3,03%) and. Six species of gram negative bacteria which are Shigella (1 sample; 3,03%), Diplococcus (1 sample; 3,03%), Enterobacter cloacae (2 samples; 6,06%), Enterobacter agglomerans (2 samples; 6,06%), Pseudomonas spp. (4 samples; 12,12%), and Proteus vulgaris (7 samples; 21,21%). The conclusion of this research most types bacteria of found were Bacillus subtilis. Keywords: bacteria, refillable drinking water    Abstrak: Air merupakan senyawa kimia yang sangat penting fungsinya bagi kehidupan umat manusia dan mahkluk hidup lainnya tapi juga dapat berperan sebagai media penularan penyakit. Air minum isi ulang telah menjadi pilihan umum masyarakat Indonesia, termasuk di kota Manado.Salah satu penyakit yang disebabkan oleh air minum yang kualitas mikrobiologisnya buruk adalah diare.Untuk mengetahui kondisi terkontaminasi tidaknya air minum isi ulang diperlukan penelitian atau pengujian secara klinis di laboratorium.Tujuan dari penelitian ini adalah untuk mengetahui pola bakteri pada air minum isi ulang. Penelitian ini menggunakan metode penelitian deskriptif dengan pendekatan cross sectional. Sampel diambil dari 20 depot air minum isi ulang di Kota Manado yang telah memenuhi kriteria inklusi. Identifikasi bakteri dilakukan dengan media kultur. Hasil penelitian menunjukkan 4 sampel terdapat bakteri gram positif, 5 sampel terdapat gram negatif dan 11 sampel terdapat campuran bakteri gram positif dan gram negatif.Bakteri gram positif terdiri dari 3 spesies yaitu Bacillus subtilis (14 sampel; 42,42%), Streptococcus spp. (1 sampel; 3,03%)dan Staphilococcus spp. (1 sampel; 3,03%). Enam bakteri spesies gram negatif yaitu Shigella (1 sampel; 3,03%), Diplococcus (1 sampel; 3,03%), Enterobacter cloacae (2 sampel; 6,06%), Enterobacter agglomerans (2 sampel; 6,06%), Pseudomonas spp. (4 sampel; 12,12%) dan Proteus vulgaris (7 sampel; 21,21%). Kesimpulan pada penelitian ini jenis bakteri terbanyak yang ditemukan adalahBacillus subtilis. Kata Kunci: bakteri, air minum isi ulang

scholarly journals Analysis of risk factors and clinical indicators in bloodstream infections among patients with hematological malignancy : a retrospective study

2020 ◽  
Author(s):  
Yating Ma ◽  
Ming Yang ◽  
Jinfeng Bao ◽  
Chengbin Wang
Keyword(s):  
Risk Factors ◽  
Blood Culture ◽  
Hematological Malignancy ◽  
Gram Negative Bacteria ◽  
Negative Group ◽  
Infection Group ◽  
Gram Positive ◽  
Gram Negative ◽  
Gram Positive Bacteria ◽  
Culture Positive

Abstract Background: The incidence of bloodstream infection caused by bacteremia is more common in patients with hematological malignancy. It is important to distinguish infectious episodes from non-infectious episodes. The present study was aimed to describe epidemiology and clinical indexes for in-hospital infection of hematological malignancy patients.Methods: Single-center retrospective research was performed on hematological malignancy patients admitted to our hospital from July 2015 to March 2018. Laboratory and clinical information from 322 febrile patients were acquired. These episodes were divided by blood culture results into two groups: (1) blood culture positive group, (2) blood culture negative group.Results: In the 322 febrile cases, 81 (25.2%) patients were blood culture positive, and among them, Gram-negative bacteria (51.9%) were more isolated than Gram-positive bacteria (32.1%) and fungi (7.4%). Gram-negative bacteria were more likely to have a drug resistance than Gram-positive bacteria. Independent risk factors revealed that patients with complications, high levels of procalcitonin (PCT), glucose, interleukin-6 (IL-6) and d-dimer (D-D), and low concentration of albumin were correlated with occurrence of infection. PCT, IL-6 and D-D performed well in differentiating not only the infection group from the non-infection group, but also in the Gram-negative group from the Gram-positive group with the areas under the curve all above 0.75.Conclusions: We analyzed the risk factors for bloodstream infection in patients with hematological malignancy, the distribution of bacteria, antibiotics resistance and the changes of clinical parameters. This single-center retrospective study may provide clinicians insight to the diagnosis and treatment of infection.

Rapid demonstration of septic or infectious arthritis due to Gram-negative bacteria

1992 ◽  
Vol 50 (1) ◽  
pp. 686-687
Author(s):  
Jacob S. Hanker ◽  
Paul R. Gross ◽  
Beverly L. Giammara
Keyword(s):  
Chronic Arthritis ◽  
Blood Cultures ◽  
Gram Negative Bacteria ◽  
Infectious Arthritis ◽  
Bacterial Arthritis ◽  
Gram Positive ◽  
Gram Negative ◽  
Gram Positive Bacteria

Blood cultures are positive in approximately only 50 per cent of the patients with nongonococcal bacterial infectious arthritis and about 20 per cent of those with gonococcal arthritis. But the concept that gram-negative bacteria could be involved even in chronic arthritis is well-supported. Gram stains are more definitive in staphylococcal arthritis caused by gram-positive bacteria than in bacterial arthritis due to gram-negative bacteria. In the latter situation where gram-negative bacilli are the problem, Gram stains are helpful for 50% of the patients; they are only helpful for 25% of the patients, however, where gram-negative gonococci are the problem. In arthritis due to gram-positive Staphylococci. Gramstained smears are positive for 75% of the patients.

Antibacterial activity of magnesium oxide nanoparticles prepared by Calcination method

2019 ◽  
Vol 10 (03) ◽  
Author(s):  
Elaf Ayad Kadhem ◽  
Miaad Hamzah Zghair ◽  
Sarah , Hussam H. Tizkam, Shoeb Alahmad Salih Mahdi ◽  
Hussam H. Tizkam ◽  
Shoeb Alahmad
Keyword(s):  
Antibacterial Activity ◽  
Magnesium Oxide ◽  
Diffusion Method ◽  
Oxide Nanoparticles ◽  
Gram Negative Bacteria ◽  
Gram Positive ◽  
Gram Negative ◽  
Gram Positive Bacteria ◽  
Magnesium Oxide Nanoparticles ◽  
Agar Disc

magnesium oxide nanoparticles (MgO NPs) were prepared by simple wet chemical method using different calcination temperatures. The prepared NPs were characterized by Electrostatic Discharge (ESD), Scanning Electron Microscope (SEM) and X-ray Diffraction (XRD). It demonstrates sharp intensive peak with the increase of crystallinty and increase of the size with varying morphologies with respect to increase of calcination temperature. Antibacterial studies were done on gram negative bacteria (E.coli) and gram positive bacteria (S.aureus) by agar disc diffusion method. The zones of inhibitions were found larger for gram positive bacteria than gram negative bacteria, this mean, antibacterial MgO NPs activity more active on gram positive bacteria than gram negative bacteria because of the structural differences. It was found that antibacterial activity of MgO NPs was found it has directly proportional with their concentration.

BAKTERI PADA KARANG SCLERACTINIA DI KAWASAN PERAIRAN BUNAKEN, MOROTAI DAN RAJA AMPAT

2020 ◽  
Vol 8 (1) ◽  
pp. 122
Author(s):  
Eghbert Eghbert Elvan Eghbert Elvan Ampou ◽  
Iis Iis Triyulianti ◽  
Nuryani Widagti ◽  
Suciadi Catur Nugroho ◽  
Yuli Pancawati
Keyword(s):  
Scleractinian Coral ◽  
Gram Negative Bacteria ◽  
Hard Coral ◽  
Field Sampling ◽  
Bacterial Isolation ◽  
Gram Positive ◽  
Coral Mucus ◽  
Gram Negative ◽  
Gram Positive Bacteria

Research on hard coral (Scleractinian coral) contaminated with bacteria is still not much done, especially in Indonesian waters. This study took samples of coral mucus in 2010 at 3 (three) different locations, namely Bunaken (May); Morotai (September) and Raja Ampat (November), which focused on the analysis of Research on hard coral (Scleractinian coral) contaminated with bacteria is still not much done, especially in Indonesian waters. This study took samples of coral mucus in 2010 at 3 (three) different locations, namely Bunaken (May); Morotai (September) and Raja Ampat (November), which focused on the analysis of gram-positive and gram-negative bacteria. The method used for field sampling is time swim, which is by diving at a depth of 5-10 meters for ± 30 minutes and randomly taking samples of coral mucus using siring or by taking directly on corals (reef branching). Mucus samples were analyzed by bacterial isolation in the laboratory. The result shows that there were differences between gram-positive and gram-negative bacteria in the three research sites and that gram-positive bacteria were higher or dominant. Further research that can identify the bacteria species and explain its relationship to the ecosystem is highly recommended.Keywords: Bacteria, Scleractinian coral, gram-positive and -negative, Bunaken, Morotai, Raja Ampat  AbstrakPenelitian tentang karang keras (Scleractinian coral) yang terkontaminasi bakteri masih belum banyak dilakukan, terutama di perairan Indonesia. Penelitian ini mengambil sampel mucus karang pada tahun 2010 di 3 (tiga) lokasi berbeda, yakni Bunaken (Mei); Morotai (September) dan Raja Ampat (November), yang difokuskan pada analisis bakteri gram postif dan gram negatif. Metode yang digunakan untuk pengambilan sampel di lapangan adalah time swim, yaitu dengan penyelaman pada kedalaman 5-10 meter selama ±30 menit dan mengambil sampel mucus karang secara acak menggunakan siring atau dengan mengambil langsung pada karang (fraksi cabang). Sampel mucus dianalisis dengan cara isolasi bakteri di laboratorium. Hasil analisis menunjukkan bahwa ada perbedaan antara bakteri gram positif dan gram negative di tiga lokasi survei dan bakteri gram positif lebih tinggi atau dominan. Penelitian lebih lanjut yang dapat menentukan jenis bakteri serta menjelaskan hubungannya dengan ekosistem sangat disarankan untuk dilakukan.Kata Kunci : Bakteri, Scleractinian coral, gram positif dan negatif, Bunaken, Morotai, Raja Ampat

scholarly journals N-Doped Carbon Quantum Dots as Fluorescent Bioimaging Agents

Crystals ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 789
Author(s):  
Shih-Fu Ou ◽  
Ya-Yun Zheng ◽  
Sin-Jen Lee ◽  
Shyi-Tien Chen ◽  
Chien-Hui Wu ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Carbon Nanomaterials ◽  
Graphene Quantum Dots ◽  
Carbon Quantum Dots ◽  
Gram Negative Bacteria ◽  
Gram Positive ◽  
Gram Negative ◽  
Gram Positive Bacteria ◽  
Fluorescence Characteristics ◽  
And Staphylococcus Aureus

Graphene quantum dots, carbon nanomaterials with excellent fluorescence characteristics, are advantageous for use in biological systems owing to their small size, non-toxicity, and biocompatibility. We used the hydrothermal method to prepare functional N-doped carbon quantum dots (N-CQDs) from 1,3,6-trinitropyrene and analyzed their ability to fluorescently stain various bacteria. Our results showed that N-CQDs stain the cell septa and membrane of the Gram-negative bacteria Escherichia coli, Salmonellaenteritidis, and Vibrio parahaemolyticus and the Gram-positive bacteria Bacillus subtilis, Listeria monocytogenes, and Staphylococcus aureus. The optimal concentration of N-CQDs was approximately 500 ppm for Gram-negative bacteria and 1000 ppm for Gram-positive bacteria, and the exposure times varied with bacteria. N-Doped carbon quantum dots have better light stability and higher photobleaching resistance than the commercially available FM4-64. When excited at two different wavelengths, N-CQDs can emit light of both red and green wavelengths, making them ideal for bioimaging. They can also specifically stain Gram-positive and Gram-negative bacterial cell membranes. We developed an inexpensive, relatively easy, and bio-friendly method to synthesize an N-CQD composite. Additionally, they can serve as a universal bacterial membrane-staining dye, with better photobleaching resistance than commercial dyes.

scholarly journals Gram-positive bacteria cell wall-derived lipoteichoic acid induces inflammatory alveolar bone loss through prostaglandin E production in osteoblasts

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Tsukasa Tominari ◽  
Ayumi Sanada ◽  
Ryota Ichimaru ◽  
Chiho Matsumoto ◽  
Michiko Hirata ◽  
...  
Keyword(s):  
Cell Wall ◽  
Bone Loss ◽  
Alveolar Bone ◽  
Osteoclast Differentiation ◽  
Lipoteichoic Acid ◽  
Alveolar Bone Loss ◽  
Gram Negative Bacteria ◽  
Gram Positive ◽  
Gram Negative ◽  
Gram Positive Bacteria

AbstractPeriodontitis is an inflammatory disease associated with severe alveolar bone loss and is dominantly induced by lipopolysaccharide from Gram-negative bacteria; however, the role of Gram-positive bacteria in periodontal bone resorption remains unclear. In this study, we examined the effects of lipoteichoic acid (LTA), a major cell-wall factor of Gram-positive bacteria, on the progression of inflammatory alveolar bone loss in a model of periodontitis. In coculture of mouse primary osteoblasts and bone marrow cells, LTA induced osteoclast differentiation in a dose-dependent manner. LTA enhanced the production of PGE2 accompanying the upregulation of the mRNA expression of mPGES-1, COX-2 and RANKL in osteoblasts. The addition of indomethacin effectively blocked the LTA-induced osteoclast differentiation by suppressing the production of PGE2. Using ex vivo organ cultures of mouse alveolar bone, we found that LTA induced alveolar bone resorption and that this was suppressed by indomethacin. In an experimental model of periodontitis, LTA was locally injected into the mouse lower gingiva, and we clearly detected alveolar bone destruction using 3D-μCT. We herein demonstrate a new concept indicating that Gram-positive bacteria in addition to Gram-negative bacteria are associated with the progression of periodontal bone loss.

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