scholarly journals Spectrum of Causative Pathogens and Resistance Rates to Antibacterial Agents in Bacterial Prostatitis

Diagnostics ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 1333
Author(s):  
Alberto Trinchieri ◽  
Khalid Mohammed Abdelrahman ◽  
Kamran Hassan Bhatti ◽  
Jibril O. Bello ◽  
Krishanu Das ◽  
...  

Objective: To evaluate spectrum and resistance rates to antibacterial agents in causative pathogens of bacterial prostatitis in patients from Southern Europe, the Middle East, and Africa. Materials: 1027 isolates from cultures of urine or expressed prostatic secretion, post-massage urine or seminal fluid, or urethral samples were considered. Results: Escherichia coli (32%) and Enterococcus spp. (21%) were the most common isolates. Other Gram-negative, Gram-positive, and atypical pathogens accounted for 22%, 20%, and 5%, respectively. Resistance was <15% for piperacillin/tazobactam and carbapenems (both Gram-negative and -positive pathogens); <5% for glycopeptides against Gram-positive; 7%, 14%, and 20% for aminoglycosides, fosfomycin, and macrolides against Gram-negative pathogens, respectively; 10% for amoxicillin/clavulanate against Gram-positive pathogens; <20% for cephalosporins and fluoroquinolones against to Gram-negative pathogens (higher against Gram-positive pathogens); none for macrolides against atypical pathogens, but 20% and 27% for fluoroquinolones and tetracyclines. In West Africa, the resistance rates were generally higher, although the highest rates for ampicillin, cephalosporins, and fluoroquinolones were observed in the Gulf area. Lower rates were observed in Southeastern Europe. Conclusions: Resistance to antibiotics is a health problem requiring local health authorities to combat this phenomenon. Knowledge of the spectrum of pathogens and antibiotic resistance rates is crucial to assess local guidelines for the treatment of prostatitis.

Author(s):  
Manoj N. Bhoi ◽  
Mayuri A. Borad ◽  
Edwin A. Pithawala ◽  
Shweta Modi ◽  
Hitesh D. Patel

Some novel N'-(7-chloroquinolin-4-yl)-6-methyl-2-oxo-4-phenyl-1,2,3,4-tetrahydropyrimidine-5-carbohydrazide derivatives were synthesized via three step reactions by convectional method. The structures of all the compounds have been confirmed by FT-IR, NMR, and MASS and by elemental analysis. We have been evaluated it inhibition capacity for various gram positive and gram negative bacterial strain. All compounds were found to be good to excellent active against all four bacterial strains.


1999 ◽  
Vol 43 (8) ◽  
pp. 2027-2031 ◽  
Author(s):  
Kim L. Credito ◽  
Lois M. Ednie ◽  
Michael R. Jacobs ◽  
Peter C. Appelbaum

ABSTRACT Time-kill studies examined the activities of telithromycin (HMR 3647), erythromycin A, azithromycin, clarithromycin, roxithromycin, clindamycin, pristinamycin, amoxicillin-clavulanate, and metronidazole against 11 gram-positive and gram-negative anaerobic bacteria. Time-kill studies were carried out with the addition of Oxyrase in order to prevent the introduction of CO2. Macrolide-azalide-ketolide MICs were 0.004 to 32.0 μg/ml. Of the latter group, telithromycin had the lowest MICs, especially against non-Bacteroides fragilis group strains, followed by azithromycin, clarithromycin, erythromycin A, and roxithromycin. Clindamycin was active (MIC ≤ 2.0 μg/ml) against all anaerobes except Peptostreptococcus magnus and Bacteroides thetaiotaomicron, while pristinamycin MICs were 0.06 to 4.0 μg/ml. Amoxicillin-clavulanate had MICs of ≤1.0 μg/ml, while metronidazole was active (MICs, 0.03 to 2.0 μg/ml) against all exceptPropionibacterium acnes. After 48 h at twice the MIC, telithromycin was bactericidal (≥99.9% killing) against 6 strains, with 99% killing of 9 strains and 90% killing of 10 strains. After 24 h at twice the MIC, 90, 99, and 99.9% killing of nine, six, and three strains, respectively, occurred. Lower rates of killing were seen at earlier times. Similar kill kinetics relative to the MIC were seen with other macrolides. After 48 h at the MIC, clindamycin was bactericidal against 8 strains, with 99 and 90% killing of 9 and 10 strains, respectively. After 24 h, 90% killing of 10 strains occurred at the MIC. The kinetics of clindamycin were similar to those of pristinamycin. After 48 h at the MIC, amoxicillin-clavulanate showed 99.9% killing of seven strains, with 99% killing of eight strains and 90% killing of nine strains. At four times the MIC, metronidazole was bactericidal against 8 of 10 strains tested after 48 h and against all 10 strains after 24 h; after 12 h, 99% killing of all 10 strains occurred.


2021 ◽  
Author(s):  
Mi Yan ◽  
Shuyue Dong ◽  
Xue Shen ◽  
Chengwen Lu ◽  
Haiqing Ye ◽  
...  

Seeking all-nature derived antibacterial agents with effective disinfection function, high human safety as well as environmentally-friendly characteristics is highly required in food industry. Herein, we report lactoferrin-thymol (LF-Thy) complex as...


2017 ◽  
Vol 15 (9) ◽  
pp. 2033-2051 ◽  
Author(s):  
Shashidhar Nizalapur ◽  
Onder Kimyon ◽  
Eugene Yee ◽  
Kitty Ho ◽  
Thomas Berry ◽  
...  

Novel antibacterial peptidomimetics that inhibit the growth of planktonic cells and reduce biofilm formation in both Gram-positive and Gram-negative bacteria.


Molecules ◽  
2021 ◽  
Vol 26 (13) ◽  
pp. 3891
Author(s):  
Giovanni Petrillo ◽  
Cinzia Tavani ◽  
Lara Bianchi ◽  
Alice Benzi ◽  
Maria Maddalena Cavalluzzi ◽  
...  

Twenty-two novel, variously substituted nitroazetidines were designed as both sulfonamide and urethane vinylogs possibly endowed with antimicrobial activity. The compounds under study were obtained following a general procedure recently developed, starting from 4-nitropentadienoates deriving from a common β-nitrothiophenic precursor. While being devoid of any activity against fungi and Gram-negative bacteria, most of the title compounds performed as potent antibacterial agents on Gram-positive bacteria (E. faecalis and three strains of S. aureus), with the most potent congener being the 1-(4-chlorobenzyl)-3-nitro-4-(p-tolyl)azetidine 22, which displayed potency close to that of norfloxacin, the reference antibiotic (minimum inhibitory concentration values 4 and 1–2 μg/mL, respectively). Since 22 combines a relatively efficient activity against Gram-positive bacteria and a cytotoxicity on eucharyotic cells only at 4-times higher concentrations (inhibiting concentration on 50% of the cultured eukaryotic cells: 36 ± 10 μM, MIC: 8.6 μM), it may be considered as a promising hit compound for the development of a new series of antibacterials selectively active on Gram-positive pathogens. The relatively concise synthetic route described herein, based on widely available starting materials, could feed further structure–activity relationship studies, thus allowing for the fine investigation and optimization of the toxico-pharmacological profile.


Antibiotics ◽  
2020 ◽  
Vol 9 (6) ◽  
pp. 341 ◽  
Author(s):  
Fernando Cobo ◽  
Vicente Guillot ◽  
José María Navarro-Marí

The objectives of this study were to report the antimicrobial susceptibility of 35 clinically significant anaerobic bacteria isolated from breast abscesses between March 2017 and February 2020 in a tertiary hospital in Granada (Spain) and to describe key clinical features of the patients. Species identification was performed mainly by MALDI-TOF MS. Antimicrobial susceptibility tests were carried out against benzylpenicillin, amoxicillin–clavulanic acid, imipenem, moxifloxacin, clindamycin, metronidazole, and piperacillin–tazobactam using the gradient diffusion technique and European Committee on Antimicrobial Susceptibility Testing EUCAST breakpoints (except for moxifloxacin). The most frequent anaerobes were Finegoldia magna (31.4%; n = 11), Actinomyces spp. (17.1%; n = 6), Propionibacterium spp. (17.1%; n = 6), and Prevotella spp. (14.2%; n = 5). Imipenem, amoxicillin–clavulanic acid, and piperacillin–tazobactam were universally active against all genera tested. High overall resistance rates to clindamycin were observed, especially for Gram-positive anaerobic cocci (56.2%) and Gram-positive anaerobic bacilli (38.4%). High resistance rates to metronidazole were also observed for Gram-positive (76.9%) and Gram-negative anaerobic bacilli (50%). High resistance rates to moxifloxacin were found for Gram-negative anaerobic bacilli (50%) and Gram-positive anaerobic cocci (31.2%). No breast abscess cases of Bacteroides spp. were detected. Routine antimicrobial susceptibility testing for anaerobes in breast abscesses may contribute to allow empirical therapies to be selected in accordance with local data on resistant strains.


1968 ◽  
Vol 11 (3) ◽  
pp. 430-441 ◽  
Author(s):  
Eric J. C. Lien ◽  
Corwin Hansch ◽  
Susan M. Anderson

Author(s):  
Ahmed T. Sulaiman ◽  
Susan W. Sarsam

A new series of N-acyl hydrazones (4a-g) derived from indole-3-propionic acid (IPA) were synthesized. These N-acyl hydrazones were prepared by the reaction of 3-(1H-indol-3-yl) propane hydrazide and aldehyde in the existence of glacial acetic acid as a catalyst. 1HNMR and FT-IR analyses were used to identify the synthesized compounds and they were in vitro evaluated as antibacterial agents against six different types of microorganisms by using well diffusion method. All the tested N-acyl hydrazones (4a-g) displayed moderate activity against the Gram-negative E.coli, comparable to that of Amoxicillin. Some of the tested N-acyl hydrazones also exhibited intermediate activity against some of the examined Gram-positive and Gram-negative bacteria. While no activity was exhibited by any of the examined compounds against the Gram-positive S. aureus.


2020 ◽  
Author(s):  
Meng Li ◽  
Mingmei Du ◽  
Honghua Li ◽  
Yunxi Liu ◽  
Daihong Liu

Abstract Background: To investigate epidemiology, antibiotic-susceptibility of pathogens, and risk factors for mortality of bloodstream infection (BSI) in patients with hematological malignancies (HMs).Methods: Single-centre retrospective analysis of BSI episodes in patients with HMs in a Chinese tertiary hospital from 2012 to 2019.Results: Among 17,796 analyzed admissions, 508 BSI episodes (2.85%) were identified. Of the 522 isolates, 326 (62.45%) were Gram-negative bacteria, 173 (33.14%) were Gram-positive bacteria, and 23 (4.41%) were fungi. The incidence of BSI differed significantly among the patients with different HMs (P = 0.000): severe aplastic anemia (6.67%), acute leukemia (6.15%), myelodysplastic syndrome(3.22%), multiple myeloma (1.29%), and lymphoma (1.02%). Escherichia coli (30.65%, 160/522) was the most common pathogens, followed by Coagulase-negative staphylococci (CoNS) (19.35%, 101/522) and Klebsiella pneumonia(9.96%, 52/522). The resistance rates of E. coli, K. pneumonia, P. aeruginosa, and A. baumannii to carbapenems were 6.42%, 15.00%, 27.78%, and 78.95%, respectively. All the Gram-positive pathogens were susceptible to linezolid, and 3 vancomycin-resistant Enterococcus were isolated. The overall 14-day mortality was 9.84%. The mortality of BSI caused by A. baumannii was 73.86%, while caused by other pathogens was 7.36% (p=0.000). A multivariate analysis showed that age >65 years, A. baumannii and non-remission of the malignancy were independent predictors of 14-day mortality.Conclusion: Gram-negative bacteria continued to be the most common pathogens causing BSIs in HM patients. An extensive multi-drug resistant baumanni with high mortality rate in HM patients made empirical antimicrobial choice a highly challenging issue.


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