| 1. |
- Ariel Gianecini, Ricardo, et al.
(författare)
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Genomic Epidemiology of Azithromycin-Nonsusceptible Neisseria gonorrhoeae, Argentina, 2005-2019
- 2021
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Ingår i: Emerging Infectious Diseases. - : Centers for Disease Control and Prevention. - 1080-6040 .- 1080-6059. ; 27:9, s. 2369-2378
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Tidskriftsartikel (refereegranskat)abstract
- Azithromycin-nonsusceptible Neisseria gonorrhoeae strains are an emerging global public health threat. During 2015-2018, the prevalence of azithromycin-nonsusceptible gonococcal infection increased significantly in Argentina. To investigate the genomic epidemiology and resistance mechanisms of these strains, we sequenced 96 nonsusceptible isolates collected in Argentina during 2005-2019. Phylogenomic analysis revealed 2 main clades, which were characterized by a limited geographic distribution, circulating during January 2015-November 2019. These clades included the internationally spreading multilocus sequence types (STs) 1580 and 9363. The ST1580 isolates, which had MICs of 2-4 mu g/mL, had mutations in the 23S rRNA. The ST9363 isolates, which had MICs of 2-4 or >256 mu g/mL, had mutations in the 23S rRNA, a mosaic mtr locus, or both. Identifying the geographic dissemination and characteristics of these predominant clones will guide public health policies to control the spread of azithromycin-nonsusceptible N. gonorrhoeae in Argentina.
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| 2. |
- Börjesson, Stefan, 1979-, et al.
(författare)
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Limited Dissemination of Extended-Spectrum β-Lactamase- and Plasmid-Encoded AmpC-Producing Escherichia coli from Food and Farm Animals, Sweden
- 2016
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Ingår i: Emerging Infectious Diseases. - : U.S. Department of Health and Human Services, Centers for Disease Control and Prevention. - 1080-6040 .- 1080-6059. ; 22:4, s. 634-640
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Tidskriftsartikel (refereegranskat)abstract
- Extended-spectrum β-lactamase (ESBL)- and plasmid-encoded ampC (pAmpC)-producing Enterobacteriaceae might spread from farm animals to humans through food. However, most studies have been limited in number of isolates tested and areas studied. We examined genetic relatedness of 716 isolates from 4,854 samples collected from humans, farm animals, and foods in Sweden to determine whether foods and farm animals might act as reservoirs and dissemination routes for ESBL/pAmpC-producing Escherichia coli. Results showed that clonal spread to humans appears unlikely. However, we found limited dissemination of genes encoding ESBL/pAmpC and plasmids carrying these genes from foods and farm animals to healthy humans and patients. Poultry and chicken meat might be a reservoir and dissemination route to humans. Although we found no evidence of clonal spread of ESBL/pAmpC-producing E. coli from farm animals or foods to humans, ESBL/pAmpC-producing E. coli with identical genes and plasmids were present in farm animals, foods, and humans.
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| 3. |
- Du, Juan, et al.
(författare)
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Prevalence of Oral Human Papillomavirus Infection among Youth, Sweden
- 2012
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Ingår i: Emerging Infectious Diseases. - : Centers for Disease Control and Prevention. - 1080-6040 .- 1080-6059. ; 18:9, s. 1468-1471
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Tidskriftsartikel (refereegranskat)abstract
- Human papillomavirus (HPV) causes cervical, head, and neck cancers. We studied 483 patients at a youth clinic in Stockholm, Sweden, and found oral HPV prevalence was 9.3% and significantly higher for female youth with than without cervical HPV infection (p = 0.043). Most oral HPV types matched the co-occurring cervical types.
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| 4. |
- Eliasson, Henrik, et al.
(författare)
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The 2000 tularemia outbreak : a case-control study of risk factors in disease-endemic and emergent areas, Sweden
- 2002
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Ingår i: Emerging Infectious Diseases. - : Centers for Disease Control and Prevention (CDC). - 1080-6040 .- 1080-6059. ; 8:9, s. 956-960
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Tidskriftsartikel (refereegranskat)abstract
- A widespread outbreak of tularemia in Sweden in 2000 was investigated in a case-control study in which 270 reported cases of tularemia were compared with 438 controls. The outbreak affected parts of Sweden where tularemia had hitherto been rare, and these "emergent" areas were compared with the disease-endemic areas. Multivariate regression analysis showed mosquito bites to be the main risk factor, with an odds ratio (OR) of 8.8. Other risk factors were owning a cat (OR 2.5) and farm work (OR 3.2). Farming was a risk factor only in the disease-endemic area. Swollen lymph nodes and wound infections were more common in the emergent area, while pneumonia was more common in the disease-endemic area. Mosquito bites appear to be important in transmission of tularemia. The association between cat ownership and disease merits further investigation.
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| 5. |
- Lee, Hyukmin, et al.
(författare)
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Emergence and Spread of Cephalosporin-Resistant Neisseria gonorrhoeae with Mosaic penA Alleles, South Korea, 2012-2017
- 2019
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Ingår i: Emerging Infectious Diseases. - : Centers for Disease Control and Prevention. - 1080-6040 .- 1080-6059. ; 25:3, s. 416-424
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Tidskriftsartikel (refereegranskat)abstract
- In South Korea, surveillance of antimicrobial drug resistance in Neisseria gonorrhoeae is extremely limited. We describe the emergence and subsequent national spread of N. gonorrhoeae strains with mosaic penA alleles associated with decreased susceptibility and resistance to extended-spectrum cephalosporins. From 2012 through 2017, the proportion of mosaic penA alleles in gonococcal-positive nucleic acid amplification test (NAAT) specimens across South Korea increased from 1.1% to 23.9%. Gonococcal strains with mosaic penA alleles emerged in the international hubs of Seoul in Gyeonggi Province and Busan in South Gyeongsang Province and subsequently spread across South Korea. Most common was mosaic penA-10.001 (n = 572 isolates; 94.7%), which is associated with cefixime resistance. We also identified mosaic penA-34.001 and penA-60.001, both of which are associated with multidrug-resistant gonococcal strains and spread of cefixime and ceftriaxone resistance. Implementation of molecular resistance prediction from N. gonorrhoeae-positive nucleic acid amplification test specimens is imperative in South Korea and internationally.
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| 6. |
- Rizzardi, Kristina, et al.
(författare)
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National Surveillance for Clostridioides difficile Infection, Sweden, 2009-2016
- 2018
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Ingår i: Emerging Infectious Diseases. - : Centers for Disease Control and Prevention. - 1080-6040 .- 1080-6059. ; 24:9, s. 1617-1625
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Tidskriftsartikel (refereegranskat)abstract
- We report results from a national surveillance program for Clostridioides difficile infection (CDI) in Sweden, where CDI incidence decreased by 22% and the proportion of multidrug-resistant isolates decreased by 80% during 2012-2016. Variation in incidence between counties also diminished during this period, which might be attributable to implementation of nucleic acid amplification testing as the primary diagnostic tool for most laboratories. In contrast to other studies, our study did not indicate increased CDI incidence attributable the introduction of nucleic acid amplification testing. Our results also suggest that successful implementation of hygiene measures is the major cause of the observed incidence decrease. Despite substantial reductions in CDI incidence and prevalence of multidrug-resistant isolates, Sweden still has one of the highest CDI incidence levels in Europe. This finding is unexpected and warrants further investigation, given that Sweden has among the lowest levels of antimicrobial drug use.
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| 7. |
- Squire, Michele M., et al.
(författare)
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Novel Molecular Type of Clostridium difficile in Neonatal Pigs, Western Australia
- 2013
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Ingår i: Emerging Infectious Diseases. - : Centers for Disease Control and Prevention (CDC). - 1080-6040 .- 1080-6059. ; 19:5, s. 790-792
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Tidskriftsartikel (refereegranskat)abstract
- Clostridium difficile causes neonatal enteritis in piglets; strains of PCR ribotype 078 are most commonly identified. We investigated C. difficile prevalence in piglets in Australia and isolated a novel strain with a unique pathogenicity locus. In a mouse infection model, this strain produced more weight loss than did a ribotype 078 strain.
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| 8. |
- Svensson, Kerstin, et al.
(författare)
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Landscape epidemiology of tularemia outbreaks in Sweden
- 2009
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Ingår i: Emerging Infectious Diseases. - : Centers for Disease Control and Prevention (CDC). - 1080-6040 .- 1080-6059. ; 15:12, s. 1937-1947
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Tidskriftsartikel (refereegranskat)abstract
- Summer outbreaks of tularemia that occurred from 1995 through 2005 in 2 locations in Sweden affected 441 persons. We performed an epidemiologic investigation of these outbreaks using a novel strategy, involving high-resolution genotyping of Francisella tularensis isolates obtained from 136 patients (using 18 genetic markers developed from 6 F. tularensis genome sequences) and interviews with the patients. Strong spatial associations were found between F. tularensis subpopulations and the places of disease transmission; infection by some subpopulations occurred within areas as small as 2 km(2), indicating unidentified environmental point sources of tularemia. In both locations, disease clusters were associated with recreational areas beside water, and genetic subpopulations were present throughout the tularemia season and persisted over years. High-resolution genotyping in combination with patients' statements about geographic places of disease transmission provided valuable indications of likely sources of infection and the causal genotypes during these tularemia outbreaks.
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