Abstract:Staphylococcus cohnii subsp. cohnii belongs to the family Staphylococcaceae in the order Bacillales, class Bacilli and phylum Firmicutes. The increasing relevance of S. cohnii to human health prompted us to determine the genomic sequence of Staphylococcus cohnii subsp. cohnii strain hu-01, a multidrug-resistant isolate from a hospital in China. Here we describe the features of S. cohnii subsp. cohnii strain hu-01, together with the genome sequence and its annotation. This is the first genome sequence of the sp… Show more
“…Often methicillin resistance occurs in combination with resistance to other various antimicrobials. 22,23 After susceptibility testing to other antibiotic groups, in this study we found that the MRSA isolates from blood cultures (at 39.2%) were predominated compared to those from abscesses (15.6%) (p=0.01). The isolates from group I were from inpatients with bacteriemia.…”
Section: Discussionmentioning
confidence: 55%
“…This suggests that there is a difference in the origin of the causative agent -community acquired or hospital acquired, which is more frequently described as a reason for increasing the health care-associated infections in relation to MRSA and MRSCoNS. 6,17,22 MLS resistance that did not correlate with hospital acquired infections. Moreover, a dramatic increase in clindamycin resistance among S. aureus isolates has been described.…”
Section: Discussionmentioning
confidence: 95%
“…cohnii hu-01 is isolated from hospital environments with increasing frequency compared to other CoNS in China and Poland in recent years. 22,23 S. lugdunensis, which was isolated in only 2% of the examined patients' abscess punctures and in 1.3% of the blood cultures, can cause clinically significant infections, especially skin and soft tissue ones, prevalent in older individuals, but bacteriemia, septic arthritis, toxic shock syndrome and postoperative endophthalmitis have been observed with this etiology. Its virulence is higher than that of other CoNS and this species has common virulence factors with S. aureus.…”
Citation: Gergova RT, Tsitou VMS, Mitov IG. Molecular-genetic method for fast direct detection of Staphylococcus aureus and methicillin resistance in blood cultures and punctures. Folia Med (Plovdiv) 2019;61(4):559-65.
AbstractBackground: Invasive infections caused by methicillin resistant Staphylococcus aureus and coagulase-negative staphylococci (MRSA/ MRSCoN) require fast, adequate treatment.The aim of this study was to develop a faster protocol for direct detection of MRSA/MRSCoN in blood cultures and in abscess punctures based on mecA and species specific identification of S. aureus by polymerase-chain reaction (PCR).
Materials and methods:We examined 77 growth-positive BACTEC blood cultures and 50 abscess punctures by routine microbiological assay and simultaneous PCR detection of MRSA/MRSCoN. The specificity of the PCR was evaluated by using DNA from another 15 microbial species for negative controls. We determined the minimum inhibitory concentration (MIC) of oxacillin, vancomycin, tigecycline, linezolid, levofloxacin, clindamycin, and erythromycin against the S. aureus isolates using the E-test.
Results:In the blood cultures, the two methods detected 39.3% of MRSA, and 93.9% of MRCoNS. In the punctures, the PCR assay identified 20.9% of MRSA and 79.2% of MSSA. In the puncture cases, there were three PCR MRSA positive and culture negative samples. Screening for susceptibility to 14 antimicrobial agents demonstrated significantly higher (p<0.05) methicillin resistance in blood culture isolates than in the puncture ones (39.3% and 20.0%, respectively).
Conclusion:The new PCR protocol was very fast and specific. It was more sensitive in detecting MRSA from abscess punctures than the routine microbiological techniques. This protocol will speed up the right choice of empirical therapy, which is extremely important for saving patients' lives.
“…Often methicillin resistance occurs in combination with resistance to other various antimicrobials. 22,23 After susceptibility testing to other antibiotic groups, in this study we found that the MRSA isolates from blood cultures (at 39.2%) were predominated compared to those from abscesses (15.6%) (p=0.01). The isolates from group I were from inpatients with bacteriemia.…”
Section: Discussionmentioning
confidence: 55%
“…This suggests that there is a difference in the origin of the causative agent -community acquired or hospital acquired, which is more frequently described as a reason for increasing the health care-associated infections in relation to MRSA and MRSCoNS. 6,17,22 MLS resistance that did not correlate with hospital acquired infections. Moreover, a dramatic increase in clindamycin resistance among S. aureus isolates has been described.…”
Section: Discussionmentioning
confidence: 95%
“…cohnii hu-01 is isolated from hospital environments with increasing frequency compared to other CoNS in China and Poland in recent years. 22,23 S. lugdunensis, which was isolated in only 2% of the examined patients' abscess punctures and in 1.3% of the blood cultures, can cause clinically significant infections, especially skin and soft tissue ones, prevalent in older individuals, but bacteriemia, septic arthritis, toxic shock syndrome and postoperative endophthalmitis have been observed with this etiology. Its virulence is higher than that of other CoNS and this species has common virulence factors with S. aureus.…”
Citation: Gergova RT, Tsitou VMS, Mitov IG. Molecular-genetic method for fast direct detection of Staphylococcus aureus and methicillin resistance in blood cultures and punctures. Folia Med (Plovdiv) 2019;61(4):559-65.
AbstractBackground: Invasive infections caused by methicillin resistant Staphylococcus aureus and coagulase-negative staphylococci (MRSA/ MRSCoN) require fast, adequate treatment.The aim of this study was to develop a faster protocol for direct detection of MRSA/MRSCoN in blood cultures and in abscess punctures based on mecA and species specific identification of S. aureus by polymerase-chain reaction (PCR).
Materials and methods:We examined 77 growth-positive BACTEC blood cultures and 50 abscess punctures by routine microbiological assay and simultaneous PCR detection of MRSA/MRSCoN. The specificity of the PCR was evaluated by using DNA from another 15 microbial species for negative controls. We determined the minimum inhibitory concentration (MIC) of oxacillin, vancomycin, tigecycline, linezolid, levofloxacin, clindamycin, and erythromycin against the S. aureus isolates using the E-test.
Results:In the blood cultures, the two methods detected 39.3% of MRSA, and 93.9% of MRCoNS. In the punctures, the PCR assay identified 20.9% of MRSA and 79.2% of MSSA. In the puncture cases, there were three PCR MRSA positive and culture negative samples. Screening for susceptibility to 14 antimicrobial agents demonstrated significantly higher (p<0.05) methicillin resistance in blood culture isolates than in the puncture ones (39.3% and 20.0%, respectively).
Conclusion:The new PCR protocol was very fast and specific. It was more sensitive in detecting MRSA from abscess punctures than the routine microbiological techniques. This protocol will speed up the right choice of empirical therapy, which is extremely important for saving patients' lives.
“…DSM 20610 T was grown aerobically on a Columbia blood agar base at 37°C for 24 h. Genomic DNA was extracted using the DNeasy blood and tissue kit (Qiagen, Germany), as described earlier ( 8 ). Whole-genome sequencing was performed at the State Key Laboratory for Diagnosis and Treatment of Infectious at Zhejiang University using an Illumina HiSeq 2000 genomic sequencer.…”
Staphylococcus gallinarum DSM 20610T is a rare pathogen in humans. The increasing relevance of human health prompted us to determine the genomic sequence of S. gallinarum. The complete genome sequence of S. gallinarum includes a genome of 3,171,720 bp (33.02% G+C content) without any plasmids.
“…Till date, 35 species are whole genome sequenced, assembled and annotated some of these are: Staphylococcus aureus strain N315 [3], Staphylococcus carnosus strain TM 300 [4], Staphylococcus epidermidis strain ATCC 1228 [5], Staphylococcus haemolyticus strain JCSC 1435 [6], Staphylococcus lugdunensis strain HKU09-01 [7], Staphylococcus pseudointermidus strain ED 99 [8], Staphylococcus saprophyticus strain ATCC 15305 [9], Staphylococcus warneri strain SG 1 [10], Staphylococcus xylosus strain SMQ-121 [11] and Staphylococcus cohnii subsp. cohnii [12]. Various members of the genus Staphylococcus are commensals and inhabitant of the skin and upper respiratory tracts of mammals [13].…”
Background
Staphylococcus xylosus is coagulase-negative staphylococci (CNS), found occasionally on the skin of humans but recurrently on other mammals. Recent reports suggest that this commensal bacterium may cause diseases in humans and other animals. In this study, we present the first report of whole genome sequencing of S. xylosus strain DMB3-Bh1, which was isolated from the stool of a mouse.ResultsThe draft genome of S. xylosus strain DMB3-Bh1 consisted of 2,81,0255 bp with G+C content of 32.7 mol%, 2623 predicted coding sequences (CDSs) and 58 RNAs. The final assembly contained 12 contigs of total size 2,81,0255 bp with N50 contig length of 4,37,962 bp and the largest contig assembled measured 7,61,338 bp. Further, an interspecies comparative genomic analysis through rapid annotation using subsystem technology server was achieved with Staphylococcus aureus RF122 that revealed 36 genes having similarity with S. xylosus DMB3-Bh1. 35 genes encoded for virulence, disease and defense and 1 gene encoded for phages, prophages and transposable elements.ConclusionsThese results suggest co linearity in genes between S. xylosus DMB3-Bh1 and S. aureus RF122 that contribute to pathogenicity and might be the result of horizontal gene transfer. The study indicates that S. xylosus DMB3-Bh1 may be a potential emerging pathogen for rodents.Electronic supplementary materialThe online version of this article (doi:10.1186/s13099-016-0139-8) contains supplementary material, which is available to authorized users.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.