What is the validity of nasal MRSA swab screening in predicting culture-positive MRSA?

2022 ◽  
Vol Publish Ahead of Print ◽  
Author(s):  
Anika Godhwani ◽  
Jenil Modi ◽  
Margarita Vinogradova
Keyword(s):  
Culture Positive

Dual stain kit for the microscopic gram classification of ocular infection bacteria

1993 ◽  
Vol 51 ◽  
pp. 248-249
Author(s):  
Jacob S. Hanker ◽  
Dale N. Holdren ◽  
Kenneth L. Cohen ◽  
Beverly L. Giammara
Keyword(s):  
Contact Lenses ◽  
Ocular Infection ◽  
Gram Negative Bacteria ◽  
Gram Negative ◽  
Gram Staining ◽  
Ocular Infections ◽  
Different Types ◽  
Culture Positive ◽  
Increased Susceptibility

Keratitis and conjunctivitis (infections of the cornea or conjunctiva) are ocular infections caused by various bacteria, fungi, viruses or parasites; bacteria, however, are usually prominent. Systemic conditions such as alcoholism, diabetes, debilitating disease, AIDS and immunosuppressive therapy can lead to increased susceptibility but trauma and contact lens use are very important factors. Gram-negative bacteria are most frequently cultured in these situations and Pseudomonas aeruginosa is most usually isolated from culture-positive ulcers of patients using contact lenses. Smears for staining can be obtained with a special swab or spatula and Gram staining frequently guides choice of a therapeutic rinse prior to the report of the culture results upon which specific antibiotic therapy is based. In some cases staining of the direct smear may be diagnostic in situations where the culture will not grow. In these cases different types of stains occasionally assist in guiding therapy.

ANTIMICROBIAL SUSCEPTIBILITY IN CULTURE POSITIVE ENTERIC FEVER

2019 ◽  
Vol 3 (7) ◽  
Author(s):  
Dr. Manish Kulshrestha ◽  
Dr. Anjali Kulshrestha
Keyword(s):  
Bone Marrow ◽  
Blood Culture ◽  
Nalidixic Acid ◽  
Antimicrobial Susceptibility ◽  
Salmonella Enterica ◽  
Enteric Fever ◽  
Multidrug Resistant ◽  
Bone Marrow Culture ◽  
Diffusion Method ◽  
Culture Positive

INTRODUCTION: Enteric fever includes typhoid and paratyphoid fever. Peak incidence is seen in children 5–15 years of age; but in regions where the disease is highly endemic, as in India, children younger than 5 years of age may have the highest infection rates. There are about 22 million new typhoid cases occur each year. Young children in poor, resource limited areas, who make up the majority of the new cases and there is a mortality figures of 215,000 deaths annually. A sharp decline in the rates of complications and mortality due to typhoid fever is observed as a result of introduction of effective antibiotic therapy since 1950s. MDR-ST became endemic in many areas of Asia, including India soon after multidrug-resistant strains of Salmonella enterica serotype typhi (MDR-ST) that were resistant to all the three first-line drugs then in use, namely chloramphenicol, amoxycillin and co-trimoxazole emerged in early 1990s. MATERIAL AND METHODS: Only blood culture or bone marrow culture positive cases were included. The patients with culture isolated enteric fever were included in the study. Antimicrobial susceptibility testing was carried out by disk diffusion method using antibiotic discs. The analysis of the antimicrobial susceptibility was carried out as per CLSI interpretative guidelines. RESULTS: A total of 82 culture positive cases were included in the present study. 80 culture isolates were from blood culture and 2 from the bone marrow culture. Salmonella entericasubspecies enterica serovartyphi (S typhi) was isolated from 67 (81.70%) patients while Salmonella enterica subspecies entericaserovarparatyphi (S paratyphi A) was isolated from 13 (15.85%) cases and 2 (2.44%) were Salmonella enterica subspecies entericaserovarschottmuelleri (S paratyphi B). Of the 82 cases 65(79.3%) isolates were resistant to ciprofloxacin, 17 (20.7%) were resistant to nalidixic acid, one (1.2%) case each was resistant to Cefotaxime and ceftriaxone, 2 (2.4%) were resistant to chloramphenicol, 10 (12.2%) were resistant and to cotrimoxazole 3 (3.7%) were resistant. CONCLUSION: In a culture positive cases 65(79.3%) isolates were resistant to ciprofloxacin and 17 (20.7%) were resistant to nalidixic acid. Multidrug resistant isolates were 65(79.3%).

Pharyngeal gonorrhoea in men who have sex with men

2021 ◽  
pp. 095646242097562
Author(s):  
Daniel Richardson ◽  
Alice Pickering ◽  
Daniel Trotman ◽  
Kayleigh Nichols ◽  
Zoe Buss ◽  
...  
Keyword(s):  
Antimicrobial Resistance ◽  
Sore Throat ◽  
Routine Screening ◽  
Transmission Dynamics ◽  
Hiv Status ◽  
Sex With Men ◽  
Culture Positive

Pharyngeal gonorrhoea is important in the transmission dynamics of gonorrhoea, and generation of antimicrobial resistance and the performing of culture remains vital. We reviewed the notes of men who have sex with men (MSM) presenting to our clinic with a positive pharyngeal NAAT for gonorrhoea between January and December 2019. There were 383 cases of NAAT-positive pharyngeal gonorrhoea, and 28 (7%, 95% CI = 5.11–10.36) reported sore throat at presentation. Pharyngeal cultures were taken from 270/383 (70%), and 73/270 (27%) were culture positive with available antimicrobial sensitivities. Overall, the presence of pharyngeal symptoms was not associated with pharyngeal chlamydia (OR = 1.6, CI = 0.19–13.32, p = 0.7), HIV status (OR = 1.1, CI = 0.47–2.57, p = 0.8), positive cultures (OR = 1.9, CI = 0.78–4.62, p = 0.2) or age ( p = 0.3). Routine screening of MSM for pharyngeal gonorrhoea is important to maintain surveillance and measures need to be taken to improve pharyngeal culture sampling from MSM.

scholarly journals Bacteremic sepsis leads to higher mortality when adjusting for confounders with propensity score matching

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Lisa Mellhammar ◽  
Fredrik Kahn ◽  
Caroline Whitlow ◽  
Thomas Kander ◽  
Bertil Christensson ◽  
...  
Keyword(s):  
Intensive Care ◽  
Clinical Review ◽  
Pathogen Detection ◽  
Mortality Rates ◽  
Blood Cultures ◽  
Population Heterogeneity ◽  
Sepsis Diagnosis ◽  
Culture Positive ◽  
Culture Negative ◽  
Microbial Samples

AbstractOne can falsely assume that it is well known that bacteremia is associated with higher mortality in sepsis. Only a handful of studies specifically focus on the comparison of culture-negative and culture-positive sepsis with different conclusions depending on study design. The aim of this study was to describe outcome for critically ill patients with either culture-positive or -negative sepsis in a clinical review. We also aimed to identify subphenotypes of sepsis with culture status included as candidate clinical variables. Out of 784 patients treated in intensive care with a sepsis diagnosis, blood cultures were missing in 140 excluded patients and 95 excluded patients did not fulfill a sepsis diagnosis. Of 549 included patients, 295 (54%) had bacteremia, 90 (16%) were non-bacteremic but with relevant pathogens detected and in 164 (30%) no relevant pathogen was detected. After adjusting for confounders, 90-day mortality was higher in bacteremic patients, 47%, than in non-bacteremic patients, 36%, p = 0.04. We identified 8 subphenotypes, with different mortality rates, where pathogen detection in microbial samples were important for subphenotype distinction and outcome. In conclusion, bacteremic patients had higher mortality than their non-bacteremic counter-parts and bacteremia is more common in sepsis when studied in a clinical review. For reducing population heterogeneity and improve the outcome of trials and treatment for sepsis, distinction of subphenotypes might be useful and pathogen detection an important factor.

scholarly journals Culture-negative versus culture-positive in pyogenic spondylitis and analysis of risk factors for relapse

2021 ◽  
pp. 1-5
Author(s):  
Guohua Dai ◽  
Shuzhong Li ◽  
Chuqiang Yin ◽  
Yuanliang Sun ◽  
Jianwen Hou ◽  
...  
Keyword(s):  
Risk Factors ◽  
Pyogenic Spondylitis ◽  
Culture Positive ◽  
Culture Negative

scholarly journals Epidemiology of culture-positive mucormycosis in Queensland: 2013–2018

Pathology ◽  
2021 ◽  
Vol 53 ◽  
pp. S18
Author(s):  
Anna Hume ◽  
Claire Heney
Keyword(s):  
Culture Positive

scholarly journals Outbreak of Burkholderia cepacia Complex Due to Multiple Brands of Contaminated Aqueous Chlorhexidine in Hong Kong

2020 ◽  
Vol 41 (S1) ◽  
pp. s337-s337
Author(s):  
Shuk-Ching WONG ◽  
Vincent Chi-Chung CHENG
Keyword(s):  
Hong Kong ◽  
Peritoneal Dialysis ◽  
Burkholderia Cepacia ◽  
Environmental Samples ◽  
Community Pharmacies ◽  
Site Visit ◽  
Newly Diagnosed ◽  
Environmental Isolates ◽  
Exit Site ◽  
Culture Positive

Background: Contaminated chlorhexidine produced by a single company has been implicated in the outbreak or pseudo-outbreak of Burkholderia cepacia complex (BCC). However, simultaneous occurrence of multiple brands of contaminated chlorhexidine supplied by different manufacturers resulting in a persistent outbreak for >1 year has not been well described. Objective: We report an outbreak of BCC with epidemiological investigation and using whole-genome sequencing (WGS) analysis of patient and environmental isolates in Hong Kong. Methods: Upon the investigation of a cohort of renal patients undergoing peritoneal dialysis colonized or infected with BCC in their exit sites, different brands of 0.05% aqueous chlorhexidine (aqCHX) used for exit site dressing, supplied from hospital or purchased from community pharmacies by patients, were cultured. A risk factor analysis for exit-site acquisition of BCC was performed. A site visit to a local manufacturer was conducted to investigate the process of production and to collect environmental samples for culture, which were further analyzed by WGS along with the BCC isolates cultured from patients and aqCHX purchased from community pharmacies. Results: Four patients undergoing peritoneal dialysis had cultures positive for BCC in the exit site swab in September 2019. A snapshot screening revealed 88 (32.0%) of 275 renal dialysis patients colonized with BCC. Of these patients, 47 (17.1%) were newly diagnosed and 41 (14.9%) were known to be colonized or infected with BCC according to retrospective data retrieval from January 1, 2018. A significantly greater proportion of patients with newly diagnosed BCC (cases) had used contaminated aqCHX for exit-site dressing than those with culture negative for BCC (controls): 38 of 47 (80.9%) versus 54 of 187 (28.9%) (P < .001). Of 161 aqCHX samples, 10 brands from 4 manufacturers (purchased from community pharmacies), 125 (77.6%) were culture positive for BCC, whereas all 77 aqCHX samples supplied by the hospital, which are different brands and are produced by different manufacturers, were proven to be sterile. Of the 28 environmental samples taken from a local manufacturer during the site visit, 19 samples (67.9%, 3 collected from the instrument for production of aqCHX and all 16 newly produced aqCHX samples) were culture positive for BCC. WGS revealed 3 major clusters characterized by B. cenocepacia genomovar IIIA ST1547 and 2 novel MLST clusters from 52 patients and 26 environmental isolates selected. Conclusions: This outbreak was terminated by product recall, and the government has decided to take regulatory actions to ensure the sterility of antiseptics, including aqCHX.Funding: NoneDisclosures: None

scholarly journals Relationships among intramammary health, udder and teat characteristics, and productivity of extensively managed ewes

2021 ◽  
Vol 99 (4) ◽  
Author(s):  
Ryan M Knuth ◽  
Whitney C Stewart ◽  
Joshua B Taylor ◽  
Bledar Bisha ◽  
Carl J Yeoman ◽  
...  
Keyword(s):  
Future Research ◽  
Morphometric Traits ◽  
Maldi Tof Ms ◽  
Microbial Species ◽  
Maldi Tof ◽  
Microbial Invasion ◽  
Lactation Stage ◽  
The Impact ◽  
Culture Positive ◽  
Tof Ms

Abstract Mastitis is an economically important disease and its subclinical state is difficult to diagnose, which makes mitigation more challenging. The objectives of this study were to screen clinically healthy ewes in order to 1) identify cultivable microbial species in milk, 2) evaluate somatic cell count (SCC) thresholds associated with intramammary infection, and 3) estimate relationships between udder and teat morphometric traits, SCC, and ewe productivity. Milk was collected from two flocks in early (&lt;5 d) and peak (30 to 45 d) lactation to quantify SCC (n = 530) and numerate cultivable microbial species by culture-based isolation followed by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS; n = 243) identification. Within flock and lactation stage, 11% to 74% (mean = 36%) of samples were culture positive. More than 50 unique identifications were classified by MALDI-TOF MS analysis, and Bacillus licheniformis (18% to 27%), Micrococcus flavus (25%), Bacillus amyloliquefaciens (7% to 18%), and Staphylococcus epidermidis (26%) were among the most common within flock and across lactation stage. Optimum SCC thresholds to identify culture-positive samples ranged from 175 × 103 to 1,675 × 103 cells/mL. Ewe productivity was assessed as total 120-d adjusted litter weight (LW120) and analyzed within flock with breed, parity, year, and the linear covariate of log10 SCC (LSCC) at early or peak lactation. Although dependent on lactation stage and year, each 1-unit increase in LSCC (e.g., an increase in SCC from 100 × 103 to 1,000 × 103 cells/mL) was predicted to decrease LW120 between 9.5 and 16.1 kg when significant. Udder and teat traits included udder circumference, teat length, teat placement, and degree of separation of the udder halves. Correlations between traits were generally low to moderate within and across lactation stage and most were not consistently predictive of ewe LSCC. Overall, the frequencies of bacteria-positive milk samples indicated that subclinical mastitis (SCM) is common in these flocks and can impact ewe productivity. Therefore, future research is warranted to investigate pathways and timing of microbial invasion, genomic regions associated with susceptibility, and husbandry to mitigate the impact of SCM in extensively managed ewes.

scholarly journals Association Between Diabetic Foot Infection Wound Culture Positivity and 1-Year Admission for Invasive Infection: A Multi-Center Cohort Study

2021 ◽  
Author(s):  
Westyn Branch-Elliman ◽  
Daniel Sturgeon ◽  
Adolf W Karchmer ◽  
Hillary J Mull
Keyword(s):  
Diabetic Foot ◽  
Systemic Infection ◽  
Causative Organism ◽  
Invasive Infection ◽  
Diabetic Foot Ulcers ◽  
Diabetic Foot Infections ◽  
Culture Positivity ◽  
Wound Culture ◽  
Culture Positive ◽  
Culture Negative

Abstract Inpatients with culture-positive diabetic foot infections are at elevated risk for subsequent invasive infection with the same causative organism. In outpatients with index diabetic foot ulcers, we found that wound culture positivity was independently associated with increased odds of 1-year admission for systemic infection when compared to culture-negative wounds.

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