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Hoshino T, Takeuchi N, Ohkusu M, Hachisu Y, Hirose S, Fukasawa C, Kubota T, Ishida M, Watanabe H, Oishi K, Ishiwada N. Identification of Haemophilus influenzae serotype e strains missing the fucK gene in clinical isolates from Japan. J Med Microbiol 2019; 68:1534-1539. [PMID: 31368885 DOI: 10.1099/jmm.0.001055] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
Introduction. Certain nontypeable Haemophilus influenzae cannot be assigned a sequence type (ST) by Multilocus Sequence Typing (MLST) due to the lack of the fucK gene, one of seven MLST loci in H. influenzae, which encodes a fucose-operon enzyme.Aims. To confirm whether the loss of fucK is also found in the encapsulated strains, we analysed clinical isolates of H. influenzae serotype e (Hie).Methodology. We conducted MLST, PFGE, and antimicrobial susceptibility tests of 45 Hie strains; the majority (n=43) were derived from respiratory samples of pediatric patients at Chiba Children's Hospital between 2000 and 2016. The two remaining strains were obtained from the blood of elderly patients with invasive H. influenzae diseases (IHiDs) between 2015 and 2016 at general hospitals. For the fucK-negative strains, PCR analysis for fucose operon was also performed.Results. Four STs (ST18, 122, 621 and 1758) were assigned to 13 strains, and remaining 32 (including one associated with IHiD) were fucK-negative, completely missing the fucose operon. The allelic profiles of six other loci were identical among 31 strains and to that of ST18, 122 and 621, and these strains were genetically closely related. Forty of 45 isolates were ampicillin-sensitive.Conclusions. The loss of fucK was frequently observed in clinical isolates of Hie from children. Moreover, fucK-negative Hie may be the cause of IHiD in adult patients. The majority of Hie, including fucK-negative strains, were shown to be clonally related and were ampicillin sensitive. This represents the first report examining fucK losses in encapsulated H. influenzae.
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Affiliation(s)
- Tadashi Hoshino
- Division of Infectious Diseases, Chiba Children's Hospital, 579-1, Heta-cho, Midori-ku, Chiba-city, Chiba 266-0007, Japan
| | - Noriko Takeuchi
- Department of Infectious Diseases, Medical Mycology Research Center, Chiba University, 1-8-1, Inohana, Chuo-ku, Chiba-city, Chiba 260-8673, Japan
| | - Misako Ohkusu
- Department of Infectious Diseases, Medical Mycology Research Center, Chiba University, 1-8-1, Inohana, Chuo-ku, Chiba-city, Chiba 260-8673, Japan
| | - Yushi Hachisu
- Chiba Prefectural Institute of Public Health, 666-2, Nitona-cho, Chuo-ku, Chiba-city, Chiba 260-8715, Japan
| | - Shoko Hirose
- Department of Pediatrics, Tokyo Women's Medical University Yachiyo Medical Center, 477-96, Owadashinden, Yachiyo-city, Chiba 276-8524, Japan.,Division of Infectious Diseases, Chiba Children's Hospital, 579-1, Heta-cho, Midori-ku, Chiba-city, Chiba 266-0007, Japan
| | - Chie Fukasawa
- Division of Infectious Diseases, Chiba Children's Hospital, 579-1, Heta-cho, Midori-ku, Chiba-city, Chiba 266-0007, Japan
| | - Tetsuya Kubota
- Department of Hematology and Respiratory Medicine, Kochi Medical School, Kochi University, Kohasu, Oko-cho, Nankoku-city, Kochi 783-8505, Japan
| | - Masayuki Ishida
- Department of Infectious Diseases, Chikamori Hospital, 1-1-16, Okawasuji, Kochi-city, Kochi 780-8522, Japan
| | - Hiroshi Watanabe
- Department of Infectious Control and Prevention, Kurume University School of Medicine, 67, Asahi-machi, Kurume-city, Fukuoka 830-0011, Japan
| | - Kazunori Oishi
- Toyama Institute of Health, 1-17 Nakataikouyama, Imizu, Toyama, 930-0363, Japan
| | - Naruhiko Ishiwada
- Department of Infectious Diseases, Medical Mycology Research Center, Chiba University, 1-8-1, Inohana, Chuo-ku, Chiba-city, Chiba 260-8673, Japan
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Kaneko M, Bando Y, Fujita T, Hirose Y, Suganuma E, Ishii M, Takahashi T. Encapsulated pleural effusion due to Haemophilus influenzae biotype II in a child with trisomy 21: A case report and literature review. IDCases 2017; 10:93-96. [PMID: 29062709 PMCID: PMC5645171 DOI: 10.1016/j.idcr.2017.09.007] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2017] [Revised: 09/23/2017] [Accepted: 09/25/2017] [Indexed: 11/19/2022] Open
Abstract
This is the second case report of pediatric encapsulated pleural effusion (EPE) due to Haemophilus influenzae. We represent typical images of chest X-P, CT, echography to find the EPE. Nontypeable H. influenzae was isolated from the throat after the discharge.
Haemophilus influenzae (Hi) can colonize in the upper respiratory tract and cause severe pulmonary infections, especially among immunocompromised children. Herein, we report a case of left encapsulated pleural effusion (EPE) due to Hi in a 24-month-old girl with trisomy 21. She was already vaccinated against Hi type b. The Hi biotype II was isolated from both the blood and aspirated sputum obtained upon admission. Ampicillin/sulbactam 180 mg/kg/day was administered intravenously for 34 days with oxygen supplementation for 4 days. She clinically recovered without undergoing thoracic drainage. One month after discharge, the girl developed acute otitis media, and the throat swab was cultured. Nontypeable Hi with the same biotype II was isolated, and the infection was controlled by administering antimicrobials. In this report, a literature review regarding the EPE due to Hi in children is also summarized. Pediatric clinicians should be aware of the possibility of Hi-related EPE because of its rapid progression, although it is rare in clinical settings. In addition, they need to consider the possibility of repetitive respiratory infections with Hi in a child with trisomy 21.
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Affiliation(s)
- Masanori Kaneko
- Department of Pediatrics, Kitasato University Medical Center, 6-100 Arai, Kitamoto, Saitama 364-8501, Japan
| | - Yuki Bando
- Department of Pediatrics, Kitasato University Medical Center, 6-100 Arai, Kitamoto, Saitama 364-8501, Japan
- Department of Infection Control and Prevention, Kitasato University Medical Center, 6-100 Arai, Kitamoto, Saitama 364-8501, Japan
- Corresponding author at: Department of Pediatrics, Kitasato University Medical Center, 6-100 Arai, Kitamoto, Saitama 364-8501, Japan.Department of PediatricsKitasato University Medical Center6-100 AraiKitamotoSaitama364-8501Japan
| | - Tomohiro Fujita
- Department of Clinical Laboratory, Kitasato University Medical Center, 6-100 Arai, Kitamoto, Saitama 364-8501, Japan
| | - Yoneji Hirose
- Department of Clinical Laboratory, Kitasato University Medical Center, 6-100 Arai, Kitamoto, Saitama 364-8501, Japan
| | - Eisuke Suganuma
- Division of Infectious Diseases and Immunology, Saitama Children’s Medical Center, 1-2 Shintoshin, Chuuou-ku, Saitama, Saitama 330-8777, Japan
| | - Masahiro Ishii
- Department of Pediatrics, Kitasato University School of Medicine, 1-15-1 Kitasato, Minami-ku, Sagamihara, Kanagawa 252-0374, Japan
| | - Takashi Takahashi
- Laboratory of Infectious Diseases, Kitasato Institute for Life Sciences & Graduate School of Infection Control Sciences, Kitasato University, 5-9-1 Shirokane, Minato-ku, Tokyo 108-8641, Japan
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Yamamoto N, Hamaguchi S, Akeda Y, Santanirand P, Kerdsin A, Seki M, Ishii Y, Paveenkittiporn W, Bonomo RA, Oishi K, Malathum K, Tomono K. Clinical Specimen-Direct LAMP: A Useful Tool for the Surveillance of blaOXA-23-Positive Carbapenem-Resistant Acinetobacter baumannii. PLoS One 2015. [PMID: 26218925 PMCID: PMC4517775 DOI: 10.1371/journal.pone.0133204] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
Healthcare-associated infections are a leading cause of morbidity and mortality worldwide. Treatment is increasingly complicated by the escalating incidence of antimicrobial resistance. Among drug-resistant pathogens, carbapenem-resistant Acinetobacter baumannii (CRAb) is of increasing concern because of the limited applicable therapies and its expanding global distribution in developed countries and newly industrialized countries. Therefore, a rapid detection method that can be used even in resource-poor countries is urgently required to control this global public health threat. Conventional techniques, such as bacterial culture and polymerase chain reaction (PCR), are insufficient to combat this threat because they are time-consuming and laborious. In this study, we developed a loop-mediated isothermal amplification (LAMP) method for detecting blaOXA-23-positive CRAb, the most prevalent form of CRAb in Asia, especially in Thailand, and confirmed its efficacy as a surveillance tool in a clinical setting. Clinical samples of sputum and rectal swabs were collected from patients in a hospital in Bangkok and used for LAMP assays. After boiling and centrifugation, the supernatants were used directly in the assay. In parallel, a culture method was used for comparison purposes to evaluate the specificity and sensitivity of LAMP. As a first step, a total of 120 sputum samples were collected. The sensitivity of LAMP was 88.6% (39/44), and its specificity was 92.1% (70/76) using the culture method as the “gold standard”. When surveillance samples including sputum and rectal swabs were analyzed with the LAMP assay, its sensitivity was 100.0%. This method enables the direct analysis of clinical specimens and provides results within 40 minutes of sample collection, making it a useful tool for surveillance even in resource-poor countries.
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Affiliation(s)
- Norihisa Yamamoto
- Division of Infection Control and Prevention, Osaka University Graduate School of Medicine, Osaka, Japan
- Laboratory of Clinical Research on Infectious Diseases, Research Institute for Microbial Diseases, Osaka University, Osaka, Japan
| | - Shigeto Hamaguchi
- Division of Infection Control and Prevention, Osaka University Graduate School of Medicine, Osaka, Japan
- Laboratory of Clinical Research on Infectious Diseases, Research Institute for Microbial Diseases, Osaka University, Osaka, Japan
| | - Yukihiro Akeda
- Division of Infection Control and Prevention, Osaka University Graduate School of Medicine, Osaka, Japan
- Laboratory of Clinical Research on Infectious Diseases, Research Institute for Microbial Diseases, Osaka University, Osaka, Japan
| | - Pitak Santanirand
- Faculty of Medicine Ramathibodi Hospital, Mahidol University, Bangkok, Thailand
| | - Anusak Kerdsin
- General Bacteriology Section, National Institute of Health, Department of Medical Sciences, Ministry of Public Health, Bangkok, Thailand
| | - Masafumi Seki
- Division of Infection Control and Prevention, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Yoshikazu Ishii
- Department of Microbiology and Infectious Diseases, School of Medicine, Faculty of Medicine, Toho University, Tokyo, Japan
| | - Wantana Paveenkittiporn
- General Bacteriology Section, National Institute of Health, Department of Medical Sciences, Ministry of Public Health, Bangkok, Thailand
| | - Robert A. Bonomo
- Research Service, Louis Stokes Cleveland Veterans Affairs Medical Center, Cleveland, Ohio, United States of America
| | - Kazunori Oishi
- Laboratory of Clinical Research on Infectious Diseases, Research Institute for Microbial Diseases, Osaka University, Osaka, Japan
- Infectious Disease Surveillance Center, National Institute of Infectious Diseases, Tokyo, Japan
| | - Kumthorn Malathum
- Faculty of Medicine Ramathibodi Hospital, Mahidol University, Bangkok, Thailand
| | - Kazunori Tomono
- Division of Infection Control and Prevention, Osaka University Graduate School of Medicine, Osaka, Japan
- * E-mail:
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Hoshino T, Hachisu Y, Kikuchi T, Tokutake S, Okui H, Kutsuna S, Fukasawa C, Murayama K, Oohara A, Shimizu H, Ito M, Takahashi Y, Ishiwada N. Analysis of Haemophilus influenzae serotype f isolated from three Japanese children with invasive H. influenzae infection. J Med Microbiol 2015; 64:355-358. [PMID: 25657301 DOI: 10.1099/jmm.0.000031] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2014] [Accepted: 01/21/2015] [Indexed: 11/18/2022] Open
Abstract
In Japan, publicly subsidized Haemophilus influenzae serotype b vaccines became available in 2011; consequently, the incidence of invasive H. influenzae infection in paediatric patients of less than 5 years of age decreased dramatically. In 2013, the first case of H. influenzae serotype f (Hif) meningitis in a Japanese infant was reported, and another case of Hif meningitis in a Japanese infant was observed in 2013. We experienced a fatal paediatric case of Hif bacteraemia in 2004; therefore, we conducted an analysis of the three Hif strains isolated from these three Japanese children with invasive Hif infections. All three strains were β-lactamase-non-producing, ampicillin-sensitive strains, with MICs of 1 µg ml(-1) or less. However, one of the three strains showed slightly elevated MICs for ampicillin (1 µg ml(-1)), cefotaxime (0.25 µg ml(-1)) and meropenem (0.13 µg ml(-1)). A molecular analysis by multilocus sequence typing identified all three strains as sequence type (ST) 124, which is a predominant invasive Hif strain in many countries. SmaI-digested PFGE showed variable DNA fragmentation patterns among the strains, suggesting that some highly virulent strains have originated from a single ST124 clone and caused invasive Hif infections in Japan. Additional studies are needed to determine the factors that have led to the clonal expansion of virulent ST124 strains.
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Affiliation(s)
- Tadashi Hoshino
- Division of Infectious Diseases, Chiba Children's Hospital, Chiba, Japan
| | - Yushi Hachisu
- Chiba Prefectural Institute of Public Health, Chiba, Japan
| | | | - Shoko Tokutake
- Division of Infectious Diseases, Chiba Children's Hospital, Chiba, Japan
| | - Hideyuki Okui
- Division of Infectious Diseases, Chiba Children's Hospital, Chiba, Japan
| | - Satoru Kutsuna
- Division of Infectious Diseases, Chiba Children's Hospital, Chiba, Japan
| | - Chie Fukasawa
- Division of Infectious Diseases, Chiba Children's Hospital, Chiba, Japan
| | - Kei Murayama
- Department of Metabolism, Chiba Children's Hospital, Chiba, Japan
| | - Asami Oohara
- Children's Medical Center, Fujisawa City Hospital, Kanagawa, Japan
| | - Hiroyuki Shimizu
- Children's Medical Center, Fujisawa City Hospital, Kanagawa, Japan
| | - Midori Ito
- Department of Pediatrics, Nagoya City West Medical Center, Aichi, Japan
| | - Yoshiko Takahashi
- Department of Pediatrics, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - Naruhiko Ishiwada
- Department of Infectious Diseases, Medical Mycology Research Center, Chiba University, Chiba, Japan
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Abe K, Hoshino T, Imuta N, Nishi J, Ishiwada N. [Bacterial meningitis caused by beta-lactamase-negative, ampicillin-resistant nontypeable Haemophilus influenzae in a 1-year-old girl: a case report]. KANSENSHOGAKU ZASSHI. THE JOURNAL OF THE JAPANESE ASSOCIATION FOR INFECTIOUS DISEASES 2014; 88:291-6. [PMID: 24974453 DOI: 10.11150/kansenshogakuzasshi.88.291] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
We present herein the case report of bacterial meningitis caused by nontypeable Haemophilus influenzae (NTHi) in a 1-year-7-month-old girl with no medically significant history. NTHi from cerebrospinal fluid (CSF) was the beta-lactamase non-producing ampicillin resistant strain (BLNAR). Some beta-lactams were administrated, but fever was prolonged. Finally, rifampicin seemed to be effective. In NTHi, compared with H. influenzae type b (Hib), the prevalence of BLNAR is high. Hence, complicated cases may increase in the near future if the use of the Hib vaccine becomes widespread, and meningitis caused by NTHi increases. It may be necessary to consider combination therapy or use of non-beta-lactams that have a different antimicrobial mechanism from beta-lactams. PCR analysis revealed the possibility that the CSF isolate lacked the P5 protein gene. Though deficiency of P5 fimbriae is known to reduce the affinity of NTHi for the human respiratory epithelium, determining whether P5 deficient NTHi induced meningitis will require further study.
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Oueslati S, Smaoui H, Joubert G, Dabernat H, Kechrid A. Étude de la résistance aux β-lactamines et des marqueurs moléculaires chez 157 souches d’Haemophilus influenzae isolées chez l’enfant à Tunis. Can J Microbiol 2009; 55:515-9. [DOI: 10.1139/w08-142] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The aim of this study was to precise the capsular type of Haemophilus influenzae , to determine its susceptibility to β-lactam agents, and to search for an eventual clonality between the clinical strains of the pathogen. Polymerase chain reaction was carried out to confirm the capsular type and to determine the β-lactamase type. Minimum inhibitory concentrations (MICs) of β-lactam agents for H. influenzae were determined by the agar dilution method on Haemophilus test medium, and the strains were analyzed by pulsed-field gel electrophoresis after SmaI restriction. Among 157 strains of H. influenzae studied, 12.1% was of serotype b. Sixty-seven strains (42.7%) were resistant to amoxicillin, among which 51 were resistant through production of TEM-type β-lactamase while 16 showed high MICs for amoxicillin, amoxicillin + clavulanic acid, and cefuroxim, which suggested a resistance by modification of penicillin-binding proteins. Among the latter strains, five were producing TEM-type β-lactamase. Cefotaxim, cefixim, and cefpodoxim had low MICs in all cases. The pulsed-field gel electrophoresis revealed 110 pulsotypes. All H. influenzae strains, including noncapsulated strains and serotype-b encapsulated strains, had a high level of heterogeneity, with diversity indices of respectively 0.67 and 0.94.
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Affiliation(s)
- S. Oueslati
- Laboratoire de microbiologie, Hôpital d’enfants de Tunis, Bab Sâadoun, Tunis 1007, Tunisie
- Laboratoire de bactériologie–hygiène, Faculté de médecine Toulouse Purpan, 37, allée Jules Gesde, 31073 Toulouse CEDEX, France
| | - H. Smaoui
- Laboratoire de microbiologie, Hôpital d’enfants de Tunis, Bab Sâadoun, Tunis 1007, Tunisie
- Laboratoire de bactériologie–hygiène, Faculté de médecine Toulouse Purpan, 37, allée Jules Gesde, 31073 Toulouse CEDEX, France
| | - G. Joubert
- Laboratoire de microbiologie, Hôpital d’enfants de Tunis, Bab Sâadoun, Tunis 1007, Tunisie
- Laboratoire de bactériologie–hygiène, Faculté de médecine Toulouse Purpan, 37, allée Jules Gesde, 31073 Toulouse CEDEX, France
| | - H. Dabernat
- Laboratoire de microbiologie, Hôpital d’enfants de Tunis, Bab Sâadoun, Tunis 1007, Tunisie
- Laboratoire de bactériologie–hygiène, Faculté de médecine Toulouse Purpan, 37, allée Jules Gesde, 31073 Toulouse CEDEX, France
| | - A. Kechrid
- Laboratoire de microbiologie, Hôpital d’enfants de Tunis, Bab Sâadoun, Tunis 1007, Tunisie
- Laboratoire de bactériologie–hygiène, Faculté de médecine Toulouse Purpan, 37, allée Jules Gesde, 31073 Toulouse CEDEX, France
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Ben Salem Y, Boullegue O, Mastouri M, Ktata S, Boujaafar N, Mzoughi R. [Molecular characterization of invasive Haemophilus influenzae strains isolated in Tunisia]. PATHOLOGIE-BIOLOGIE 2006; 54:137-47. [PMID: 15964713 DOI: 10.1016/j.patbio.2005.04.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/28/2004] [Accepted: 04/18/2005] [Indexed: 05/03/2023]
Abstract
We reported a molecular characterization of 25 Haemophilus influenzae strains derived from cases of meningitis and sepsis in children aged less than five years hospitalized in pediatric wards from three hospitals in the Sahel area (Tunisia) during the period 1997-2002. These strains were biotyped and subjected to a capsular typing by Slide agglutination serotyping and Polymerase Chain Reaction (PCR). The genetic polymorphism of these strains was also studied in Arbitrarily Primed Polymerase Chain Reaction (AP-PCR) with two sets of primers: RAP IV and 217 delta(2) as in Pulsed Field Gel Electrophoresis after digestion of the total DNA with the restriction enzyme SmaI (PFGE SmaI). Nineteen strains among 25 (76%) were of biotype I. The bexA gene was highlighted in 13 strains (52%) and in all the cases it was of the type b. Twelve strains (48%) were shown to be unencapsulated by PCR. AP-PCR RAP IV (23 genotypes/25 with a discrimination index ID=0.993) had shown nearly the same discriminatory power than PFGE (20 genotypes/21 strains with a discrimination index ID=0.995). We thus note, how capsular typing by PCR is more sensitive than slide agglutination serotyping. We also note the genetic diversity of the invasive strains isolated with a remarkable presence of non typable strains. AP PCR seems to be an alternative of choice for the epidemiologic follow-up of the Haemophilus influenzae invasive infections.
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Skoczyńska A, Kadłubowski M, Empel J, Hryniewicz W. Characteristics of Haemophilus influenzae type b responsible for meningitis in Poland from 1997 to 2004. J Clin Microbiol 2005; 43:5665-9. [PMID: 16272502 PMCID: PMC1287841 DOI: 10.1128/jcm.43.11.5665-5669.2005] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Two hundred forty-five H. influenzae isolates responsible for meningitis in Poland from 1997 to 2004 were studied. Among these, 233 (95.1%) belonged to serotype b (Hib), 2 belonged to serotype f, and 10 were noncapsulated. The relatedness of all isolates was evaluated by pulsed-field gel electrophoresis (PFGE), and selected representatives were evaluated by multilocus sequence typing. Resistance to ampicillin was identified in 34 (14.6%) of the Hib isolates and was associated with the production of beta-lactamase only. Except for four isolates nonsusceptible to chloramphenicol, all isolates were susceptible to cefotaxime, ciprofloxacin, and rifampin. The PFGE analysis divided the Hib isolates into five PFGE types; however, all of them were possibly related. The most common PFGE type, with 25 subtypes, was characteristic for 97.4% of the isolates. The most prevalent PFGE subtype found in our study was also the most common among the Hib isolates responsible for invasive disease in Italy and the Czech Republic and was found among isolates causing lower respiratory tract infections in Poland. The most prevalent sequence types (STs) in the studied group were ST6 and ST92. Four new STs were found: ST188, ST189, ST190, and ST268. Results of this study support the evidence that the genetic structure of encapsulated H. influenzae is clonal. The continuing high number of meningitis cases due to Hib in Poland underlines the need for mass vaccination against Hib in Poland.
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Affiliation(s)
- Anna Skoczyńska
- National Reference Centre for Bacterial Meningitis, Dept. of Epidemiology and Clinical Microbiology, National Institute of Public Health, Chelmska 30/34, 00-725 Warsaw, Poland.
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Dabernat H, Pélissier R, Faucon G, Séguy M, Delmas C. Genotyping of type b Haemophilus influenzae strains, comparison of strains collected before and during vaccine availability. Med Mal Infect 2005; 35:205-12. [PMID: 15914289 DOI: 10.1016/j.medmal.2005.02.005] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2005] [Accepted: 02/01/2005] [Indexed: 11/25/2022]
Abstract
OBJECTIVE AND METHOD Five hundred and seventy-eight strains of type b Haemophilus influenzae (521 isolated in children, and 57 in adults) were compared using pulsed-field gel electrophoresis (PFGE) to assess strain evolution and to study the impact of the generalization of anti-Haemophilus b (anti-Hib) vaccination in France. Among these strains, 398 (including 342 from meningitis) were isolated in 1985-1992 (pre-vaccination era), 39 (including 31 from meningitis) in 1993 (year of the generalization of anti-Hib vaccination), and 141 (including 50 from CSF) in 1994-2001 (vaccination era). RESULTS A total of 102 PFGE patterns (patterns for 1-101 isolates) were obtained after SmaI restriction of the 578 strains. The strains isolated in children were distributed in 96 patterns, and those isolated in the adult in 34 patterns. The strains isolated during the pre-vaccination era presented 94 patterns. During the vaccination era, 50% of the patterns disappeared and 12 new patterns (11.7%) including 15 strains were observed. The strains belonging to the new patterns (including the two observed in 1993) were isolated in adults (n=7) from blood culture and bronchial secretions, and children (n=9) from CSF, blood culture, and bronchial secretions. In children, among the strains associated to vaccination failure, two presented with a new pulsotype. CONCLUSION There is no evidence that the vaccination program brought about any drastic modifications in the type b strains causing meningitis or in the other type b strains in circulation whether in adults or children.
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Affiliation(s)
- H Dabernat
- Laboratoire de Microbiologie, Centre National de Référence des Haemophilus influenzae, Hôpital Purpan, CHU de Purpan, 37, allées Jules-Guesde, 31073 Toulouse cédex, France.
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Okatani AT, Hayashidani H, Takahashi T, Taniguchi T, Ogawa M, Kaneko K. Randomly amplified polymorphic DNA analysis of Erysipelothrix spp. J Clin Microbiol 2000; 38:4332-6. [PMID: 11101560 PMCID: PMC87601 DOI: 10.1128/jcm.38.12.4332-4336.2000] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2000] [Accepted: 09/29/2000] [Indexed: 11/20/2022] Open
Abstract
The usefulness of randomly amplified polymorphic DNA method (RAPD) to identify each species of genus Erysipelothrix and for epidemiological analysis of this genus was studied. Eighty-one strains and 18 random primers were tested. Among the tested primers, the primers NK51 (GGTGGTGGTATC) and NK6 (CCCGCGCCCC) produced noticeable results. The primer NK51 revealed four species-specific RAPD patterns. Of the 66 strains of E. rhusiopathiae, 64 had the same unique band of 884 bp. Of the 12 strains of E. tonsillarum, 11 produced a 1,265-bp band. In addition, two strains, previously thought to be E. rhusiopathiae, produced the 1,265-bp band, suggesting that they had been misclassified. One strain of E. tonsillarum produced the 884-bp band, suggesting that it too was E. rhusiopathiae. The E. rhusiopathiae strain of serovar 13 produced a 650-bp band, and the strain of serovar 18 produced a clear 420-bp band as well as three weak bands of 1,265, 918, and 444 bp. The primer NK6 revealed 14 RAPD patterns that were not serovar specific. However, different patterns were produced among strains of the same serovar showing that the RAPD method is able to identify the genetic variations of strains of this genus and can rapidly and easily differentiate strains of the same serovar. Based on these results, we concluded that the RAPD method with primers NK51 and NK6 is a rapid and reliable method to identify the species of this genus; we also concluded that this method might be a useful tool for the epidemiological analysis of the Erysipelothrix species.
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Affiliation(s)
- A T Okatani
- Department of Veterinary Medicine, Faculty of Agriculture, Tokyo University of Agriculture and Technology, Fuchu, Tokyo 183-8509, Japan
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