Emerging Infectious Diseases journal

Perspective

• Determinants and Drivers of Infectious Disease Threat Events in Europe PDF Version [PDF - 522 KB - 9 pages]
  J. C. Semenza et al.
  View Summary

  Globalization and environment, the most frequent underlying drivers, should be targeted for interventions to prevent such events.

     View Abstract

  Infectious disease threat events (IDTEs) are increasing in frequency worldwide. We analyzed underlying drivers of 116 IDTEs detected in Europe during 2008–2013 by epidemic intelligence at the European Centre of Disease Prevention and Control. Seventeen drivers were identified and categorized into 3 groups: globalization and environment, sociodemographic, and public health systems. A combination of >2 drivers was responsible for most IDTEs. The driver category globalization and environment contributed to 61% of individual IDTEs, and the top 5 individual drivers of all IDTEs were travel and tourism, food and water quality, natural environment, global trade, and climate. Hierarchical cluster analysis of all drivers identified travel and tourism as a distinctly separate driver. Monitoring and modeling such disease drivers can help anticipate future IDTEs and strengthen control measures. More important, intervening directly on these underlying drivers can diminish the likelihood of the occurrence of an IDTE and reduce the associated human and economic costs.

Synopses

• Shiga Toxin–Producing Escherichia coli O157, England and Wales, 1983–2012 PDF Version [PDF - 640 KB - 8 pages]
  N. L. Adams et al.
  View Summary

  Although incidence remained constant, outbreaks from contaminated meat and milk declined and those from petting farms and schools and nurseries increased.

     View Abstract

  We evaluated clinical Shiga toxin–producing Escherichia coli O157 infections in England and Wales during 1983–2012 to describe changes in microbiological and surveillance methods. A strain replacement event was captured; phage type (PT) 2 decreased to account for just 3% of cases by 2012, whereas PT8 and PT21/28 strains concurrently emerged, constituting almost two thirds of cases by 2012. Despite interventions to control and reduce transmission, incidence remained constant. However, sources of infection changed over time; outbreaks caused by contaminated meat and milk declined, suggesting that interventions aimed at reducing meat cross-contamination were effective. Petting farm and school and nursery outbreaks increased, suggesting the emergence of other modes of transmission and potentially contributing to the sustained incidence over time. Studies assessing interventions and consideration of policies and guidance should be undertaken to reduce Shiga toxin–producing E. coli O157 infections in England and Wales in line with the latest epidemiologic findings.

• Nosocomial Co-Transmission of Avian Influenza A(H7N9) and A(H1N1)pdm09 Viruses between 2 Patients with Hematologic Disorders PDF Version [PDF - 588 KB - 10 pages]
  H. Chen et al.
  View Summary

  Transmission of these viruses was limited to 2 immunocompromised patients in the same ward.

     View Abstract

  A nosocomial cluster induced by co-infections with avian influenza A(H7N9) and A(H1N1)pdm09 (pH1N1) viruses occurred in 2 patients at a hospital in Zhejiang Province, China, in January 2014. The index case-patient was a 57-year-old man with chronic lymphocytic leukemia who had been occupationally exposed to poultry. He had co-infection with H7N9 and pH1N1 viruses. A 71-year-old man with polycythemia vera who was in the same ward as the index case-patient for 6 days acquired infection with H7N9 and pH1N1 viruses. The incubation period for the second case-patient was estimated to be <4 days. Both case-patients died of multiple organ failure. Virus genetic sequences from the 2 case-patients were identical. Of 103 close contacts, none had acute respiratory symptoms; all were negative for H7N9 virus. Serum samples from both case-patients demonstrated strong proinflammatory cytokine secretion but incompetent protective immune responses. These findings strongly suggest limited nosocomial co-transmission of H7N9 and pH1N1 viruses from 1 immunocompromised patient to another.

Research

• Quantifying Transmission of Clostridium difficile within and outside Healthcare Settings PDF Version [PDF - 619 KB - 9 pages]
  D. P. Durham et al.
  View Summary

  Empirical quantification of transmission dynamics for all settings is needed when evaluating interventions and control strategies.

     View Abstract

  To quantify the effect of hospital and community-based transmission and control measures on Clostridium difficile infection (CDI), we constructed a transmission model within and between hospital, community, and long-term care-facility settings. By parameterizing the model from national databases and calibrating it to C. difficile prevalence and CDI incidence, we found that hospitalized patients with CDI transmit C. difficile at a rate 15 (95% CI 7.2–32) times that of asymptomatic patients. Long-term care facility residents transmit at a rate of 27% (95% CI 13%–51%) that of hospitalized patients, and persons in the community at a rate of 0.1% (95% CI 0.062%–0.2%) that of hospitalized patients. Despite lower transmission rates for asymptomatic carriers and community sources, these transmission routes have a substantial effect on hospital-onset CDI because of the larger reservoir of hospitalized carriers and persons in the community. Asymptomatic carriers and community sources should be accounted for when designing and evaluating control interventions.

• Microevolution of Monophasic Salmonella Typhimurium during Epidemic, United Kingdom, 2005–2010 PDF Version [PDF - 686 KB - 8 pages]
  L. Petrovska et al.
  View Summary

  Microevolution resulted in considerable genotypic variation.

     View Abstract

  Microevolution associated with emergence and expansion of new epidemic clones of bacterial pathogens holds the key to epidemiologic success. To determine microevolution associated with monophasic Salmonella Typhimurium during an epidemic, we performed comparative whole-genome sequencing and phylogenomic analysis of isolates from the United Kingdom and Italy during 2005–2012. These isolates formed a single clade distinct from recent monophasic epidemic clones previously described from North America and Spain. The UK monophasic epidemic clones showed a novel genomic island encoding resistance to heavy metals and a composite transposon encoding antimicrobial drug resistance genes not present in other Salmonella Typhimurium isolates, which may have contributed to epidemiologic success. A remarkable amount of genotypic variation accumulated during clonal expansion that occurred during the epidemic, including multiple independent acquisitions of a novel prophage carrying the sopE gene and multiple deletion events affecting the phase II flagellin locus. This high level of microevolution may affect antigenicity, pathogenicity, and transmission.

• Molecular Typing and Epidemiology of Human Listeriosis Cases, Denmark, 2002–2012 PDF Version [PDF - 656 KB - 9 pages]
  A. Jensen et al.
  View Summary

  A clone of Listeria monocytogenes CC8 caused bacteremia in the elderly and a high incidence of listeriosis.

     View Abstract

  Denmark has a high incidence of invasive listeriosis (0.9 cases/100,000 population in 2012). We analyzed patient data, clinical outcome, and trends in pulsed-field gel electrophoresis (PFGE) and multilocus sequence typing (MLST) of Listeria monocytogenes strains isolated in Denmark during 2002–2012. We performed 2-enzyme PFGE and serotyping on 559 isolates and MLST on 92 isolates and identified some correlation between molecular type and clinical outcome and patient characteristics. We found 178 different PFGE types, but isolates from 122 cases belonged to just 2 closely related PFGE types, clonal complex 8 and sequence type 8. These 2 types were the main cause of a peak in incidence of invasive listeriosis during 2005–2009, possibly representing an outbreak or the presence of a highly prevalent clone. However, current typing methods could not fully confirm these possibilities, highlighting the need for more refined discriminatory typing methods to identify outbreaks within frequently occurring L. monocytogenes PFGE types.

• Limited Dissemination of Extended-Spectrum β-Lactamase– and Plasmid-Encoded AmpC–Producing Escherichia coli from Food and Farm Animals, Sweden PDF Version [PDF - 761 KB - 7 pages]
  S. Börjesson et al.
  View Summary

  Food is a limited source of these antimicrobial resistance genes for humans.

     View 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.

• Post-Ebola Syndrome, Sierra Leone PDF Version [PDF - 529 KB - 6 pages]
  J. T. Scott et al.
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  Ebola survivors experience a range of medical conditions.

     View Abstract

  Thousands of persons have survived Ebola virus disease. Almost all survivors describe symptoms that persist or develop after hospital discharge. A cross-sectional survey of the symptoms of all survivors from the Ebola treatment unit (ETU) at 34th Regimental Military Hospital, Freetown, Sierra Leone (MH34), was conducted after discharge at their initial follow-up appointment within 3 weeks after their second negative PCR result. From its opening on December 1, 2014, through March 31, 2015, the MH34 ETU treated 84 persons (8–70 years of age) with PCR-confirmed Ebola virus disease, of whom 44 survived. Survivors reported musculoskeletal pain (70%), headache (48%), and ocular problems (14%). Those who reported headache had had lower admission cycle threshold Ebola PCR than did those who did not (p<0.03). This complete survivor cohort from 1 ETU enables analysis of the proportion of symptoms of post-Ebola syndrome. The Ebola epidemic is waning, but the effects of the disease will remain.

• Transmission of Middle East Respiratory Syndrome Coronavirus Infections in Healthcare Settings, Abu Dhabi PDF Version [PDF - 563 KB - 10 pages]
  J. C. Hunter et al.
  View Summary

  Early detection and adherence to infection prevention recommendations are necessary to avoid transmission.

     View Abstract

  Middle East respiratory syndrome coronavirus (MERS-CoV) infections sharply increased in the Arabian Peninsula during spring 2014. In Abu Dhabi, United Arab Emirates, these infections occurred primarily among healthcare workers and patients. To identify and describe epidemiologic and clinical characteristics of persons with healthcare-associated infection, we reviewed laboratory-confirmed MERS-CoV cases reported to the Health Authority of Abu Dhabi during January 1, 2013–May 9, 2014. Of 65 case-patients identified with MERS-CoV infection, 27 (42%) had healthcare-associated cases. Epidemiologic and genetic sequencing findings suggest that 3 healthcare clusters of MERS-CoV infection occurred, including 1 that resulted in 20 infected persons in 1 hospital. MERS-CoV in healthcare settings spread predominantly before MERS-CoV infection was diagnosed, underscoring the importance of increasing awareness and infection control measures at first points of entry to healthcare facilities.

• Lassa Virus Seroprevalence in Sibirilia Commune, Bougouni District, Southern Mali PDF Version [PDF - 475 KB - 7 pages]
  N. Sogoba et al.
  View Summary

  The high rate documented in this study highlights the need for increased surveillance.

  Lassa Virus Seroprevalence, Mali

     View Abstract

  Lassa virus (LASV) is endemic to several nations in West Africa. In Mali, LASV was unknown until an exported case of Lassa fever was reported in 2009. Since that time, rodent surveys have found evidence of LASV-infected Mastomys natalensis rats in several communities in southern Mali, near the border with Côte d’Ivoire. Despite increased awareness, to date only a single case of Lassa fever has been confirmed in Mali. We conducted a survey to determine the prevalence of LASV exposure among persons in 3 villages in southern Mali where the presence of infected rodents has been documented. LASV IgG seroprevalence ranged from 14.5% to 44% per village. No sex bias was noted; however, seropositivity rates increased with participant age. These findings confirm human LASV exposure in Mali and suggest that LASV infection/Lassa fever is a potential public health concern in southern Mali.

• Nipah Virus Transmission from Bats to Humans Associated with Drinking Traditional Liquor Made from Date Palm Sap, Bangladesh, 2011–2014 PDF Version [PDF - 442 KB - 8 pages]
  M. Islam et al.
  View Summary

  Interventions that prevent bat access to this sap might prevent these infections.

     View Abstract

  Nipah virus (NiV) is a paramyxovirus, and Pteropus spp. bats are the natural reservoir. From December 2010 through March 2014, hospital-based encephalitis surveillance in Bangladesh identified 18 clusters of NiV infection. The source of infection for case-patients in 3 clusters in 2 districts was unknown. A team of epidemiologists and anthropologists investigated these 3 clusters comprising 14 case-patients, 8 of whom died. Among the 14 case-patients, 8 drank fermented date palm sap (tari) regularly before their illness, and 6 provided care to a person infected with NiV. The process of preparing date palm trees for tari production was similar to the process of collecting date palm sap for fresh consumption. Bat excreta was reportedly found inside pots used to make tari. These findings suggest that drinking tari is a potential pathway of NiV transmission. Interventions that prevent bat access to date palm sap might prevent tari-associated NiV infection.

• Evaluation of Viremia Frequencies of a Novel Human Pegivirus by Using Bioinformatic Screening and PCR PDF Version [PDF - 622 KB - 8 pages]
  D. Bonsall et al.
  View Summary

  Bioinformatic screening and PCR-based approaches detected active infection with human hepegivirus-1 in exposed populations.

     View Abstract

  Next-generation sequencing has critical applications in virus discovery, diagnostics, and environmental surveillance. We used metagenomic sequence libraries for retrospective screening of plasma samples for the recently discovered human hepegivirus 1 (HHpgV-1). From a cohort of 150 hepatitis C virus (HCV)–positive case-patients, we identified 2 persons with HHpgV-1 viremia and a high frequency of human pegivirus (HPgV) viremia (14%). Detection of HHpgV-1 and HPgV was concordant with parallel PCR-based screening using conserved primers matching groups 1 (HPgV) and 2 (HHPgV-1) nonstructural 3 region sequences. PCR identified 1 HHPgV-1–positive person with viremia from a group of 195 persons with hemophilia who had been exposed to nonvirally inactivated factor VII/IX; 18 (9%) were HPgV-positive. Relative to HCV and HPgV, active infections with HHpgV-1 were infrequently detected in blood, even in groups that had substantial parenteral exposure. Our findings are consistent with lower transmissibility or higher rates of virus clearance for HHpgV-1 than for other bloodborne human flaviviruses.

• Medscape CME Activity
  Shiga Toxin 1–Producing Shigella sonnei Infections, California, United States, 2014–2015 PDF Version [PDF - 558 KB - 8 pages]
  K. Lamba et al.
  View Summary

  Initially transmitted among persons traveling to the US from Mexico, the bacteria was domestically transmitted to 42 of 56 case-patients.

     View Abstract

  Shiga toxins (Stx) are primarily associated with Shiga toxin–producing Escherichia coli and Shigella dysenteriae serotype 1. Stx production by other shigellae is uncommon, but in 2014, Stx1-producing S. sonnei infections were detected in California. Surveillance was enhanced to test S. sonnei isolates for the presence and expression of stx genes, perform DNA subtyping, describe clinical and epidemiologic characteristics of case-patients, and investigate for sources of infection. During June 2014–April 2015, we identified 56 cases of Stx1-producing S. sonnei, in 2 clusters. All isolates encoded stx₁ and produced active Stx1. Multiple pulsed-field gel electrophoresis patterns were identified. Bloody diarrhea was reported by 71% of case-patients; none had hemolytic uremic syndrome. Some initial cases were epidemiologically linked to travel to Mexico, but subsequent infections were transmitted domestically. Continued surveillance of Stx1-producing S. sonnei in California is necessary to characterize its features and plan for reduction of its spread in the United States.

Dispatches

• Adenovirus Type 7 Pneumonia in Children Who Died from Measles-Associated Pneumonia, Hanoi, Vietnam, 2014 PDF Version [PDF - 395 KB - 4 pages]
  L. Hai et al.
     View Abstract

  During a 2014 measles outbreak in Vietnam, postmortem pathologic examination of hospitalized children who died showed that adenovirus type 7 pneumonia was a contributory cause of death in children with measles-associated immune suppression. Adenovirus type 7 pneumonia should be recognized as a major cause of secondary infection after measles.

• Elevated Toxoplasma gondii Infection Rates for Retinas from Eye Banks, Southern Brazil PDF Version [PDF - 327 KB - 3 pages]
  A. G. Commodaro et al.
     View Abstract

  We found significantly higher incidence of Toxoplasma gondii DNA in eye bank specimens from Joinville in southern Brazil (13/15, 87%) than in São Paulo (3/42, 7%; p = 2.1 × 10E–8). PCR DNA sequence analysis was more sensitive at locus NTS2 than at locus B1; a high frequency of mixed co-infections was detected.

• Arenavirus Diversity and Phylogeography of Mastomys natalensis Rodents, Nigeria PDF Version [PDF - 451 KB - 4 pages]
  A. Olayemi et al.
     View Abstract

  Mastomys natalensis rodents are natural hosts for Lassa virus (LASV). Detection of LASV in 2 mitochondrial phylogroups of the rodent near the Niger and Benue Rivers in Nigeria underlines the potential for LASV emergence in fresh phylogroups of this rodent. A Mobala-like sequence was also detected in eastern Nigeria.

• Neisseria meningitidis Serogroup X in Sub-Saharan Africa PDF Version [PDF - 514 KB - 4 pages]
  A. Agnememel et al.
     View Abstract

  The epidemiology of meningococcal disease varies by geography and time. Whole-genome sequencing of Neisseria meningitidis serogroup X isolates from sub-Saharan Africa and Europe showed that serogroup X emergence in sub-Saharan Africa resulted from expansion of particular variants within clonal complex 181. Virulence of these isolates in experimental mouse models was high.

• Cross-Neutralization between Human and African Bat Mumps Viruses PDF Version [PDF - 441 KB - 4 pages]
  H. Katoh et al.
     View Abstract

  Recently, a new paramyxovirus closely related to human mumps virus (MuV) was detected in bats. We generated recombinant MuVs carrying either or both of the fusion and hemagglutinin-neuraminidase bat virus glycoproteins. These viruses showed replication kinetics similar to human MuV in cultured cells and were neutralized efficiently by serum from healthy humans.

• Definitive Hosts of Versteria Tapeworms (Cestoda: Taeniidae) Causing Fatal Infection in North America PDF Version [PDF - 457 KB - 4 pages]
  L. M. Lee et al.
     View Abstract

  We previously reported fatal infection of a captive Bornean orangutan with metacestodes of a novel taeniid tapeworm, Versteria sp. New data implicate mustelids as definitive hosts of these tapeworms in North America. At least 2 parasite genetic lineages circulate in North America, representing separate introductions from Eurasia.

• Effectiveness of a Mobile Short-Message-Service–Based Disease Outbreak Alert System in Kenya PDF Version [PDF - 870 KB - 5 pages]
  M. Toda et al.
     View Abstract

  We conducted a randomized, controlled trial to test the effectiveness of a text-messaging system used for notification of disease outbreaks in Kenya. Health facilities that used the system had more timely notifications than those that did not (19.2% vs. 2.6%), indicating that technology can enhance disease surveillance in resource-limited settings.

• Deletion Variants of Middle East Respiratory Syndrome Coronavirus from Humans, Jordan, 2015 PDF Version [PDF - 584 KB - 4 pages]
  M. M. Lamers et al.
     View Abstract

  We characterized Middle East respiratory syndrome coronaviruses from a hospital outbreak in Jordan in 2015. The viruses from Jordan were highly similar to isolates from Riyadh, Saudi Arabia, except for deletions in open reading frames 4a and 3. Transmissibility and pathogenicity of this strain remains to be determined.

• Low-Cost National Media-Based Surveillance System for Public Health Events, Bangladesh PDF Version [PDF - 328 KB - 3 pages]
  T. T. Ao et al.
     View Abstract

  We assessed a media-based public health surveillance system in Bangladesh during 2010–2011. The system is a highly effective, low-cost, locally appropriate, and sustainable outbreak detection tool that could be used in other low-income, resource-poor settings to meet the capacity for surveillance outlined in the International Health Regulations 2005.

• Exportations of Symptomatic Cases of MERS-CoV Infection to Countries outside the Middle East PDF Version [PDF - 319 KB - 3 pages]
  C. Carias et al.
     View Abstract

  In 2012, an outbreak of infection with Middle East respiratory syndrome coronavirus (MERS-CoV), was detected in the Arabian Peninsula. Modeling can produce estimates of the expected annual number of symptomatic cases of MERS-CoV infection exported and the likelihood of exportation from source countries in the Middle East to countries outside the region.

• Nontyphoidal Salmonella Infection, Guangdong Province, China, 2012 PDF Version [PDF - 386 KB - 4 pages]
  X. Huang et al.
     View Abstract

  We used active and passive surveillance to estimate nontyphoidal Salmonella (NTS) infection during 2012 in Guangdong Province, China. Under passive surveillance, for every reported NTS infection, an estimated 414.8 cases occurred annually. Under active surveillance, an estimated 35.8 cases occurred. Active surveillance provides remarkable advantages in incidence estimate.

• Severe Infections with Human Adenovirus 7d in 2 Adults in Family, Illinois, USA, 2014 PDF Version [PDF - 490 KB - 4 pages]
  A. E. Kajon and M. G. Ison
     View Abstract

  Human adenovirus 7d, a genomic variant with no reported circulation in the United States, was isolated from 2 adults with severe respiratory infections in Illinois. Molecular typing identified a close relationship with strains of the same genome type isolated from cases of respiratory disease in several provinces of China since 2009.

• Hypervirulent emm59 Clone in Invasive Group A Streptococcus Outbreak, Southwestern United States PDF Version [PDF - 553 KB - 5 pages]
  D. M. Engelthaler et al.
     View Abstract

  The hyper-virulent emm59 genotype of invasive group A Streptococcus was identified in northern Arizona in 2015. Eighteen isolates belonging to a genomic cluster grouped most closely with recently identified isolates in New Mexico. The continued transmission of emm59 in the southwestern United States poses a public health concern.

Letters

• Leishmania infantum Infection in Blood Donors, Northeastern Brazil PDF Version [PDF - 305 KB - 2 pages]
  D. Monteiro et al.
• Morbillivirus and Pilot Whale Deaths, Canary Islands, Spain, 2015 PDF Version [PDF - 345 KB - 3 pages]
  E. Sierra et al.
• Serogroup-specific Seasonality of Verotoxigenic Escherichia coli, Ireland PDF Version [PDF - 378 KB - 3 pages]
  P. Garvey et al.
• New Delhi Metallo-β-Lactamase-1–Producing Klebsiella pneumoniae, Florida, USA PDF Version [PDF - 293 KB - 3 pages]
  J. Li et al.
• Ritual Slaughter as Overlooked Risk Factor for Brucellosis PDF Version [PDF - 311 KB - 3 pages]
  I. Fuchs et al.
• Follow-up of Ebola Patient, 2014–2015 PDF Version [PDF - 294 KB - 3 pages]
  V. Srinivas et al.
• Sustained Elevated Cytokine Levels during Recovery Phase of Mayaro Virus Infection PDF Version [PDF - 339 KB - 3 pages]
  D. Tappe et al.
• Enterovirus A71 Genogroups C and E in Children with Acute Flaccid Paralysis, West Africa PDF Version [PDF - 358 KB - 3 pages]
  M. D. Fernandez-Garcia et al.
• Hepatitis E Virus Prevalence among Blood Donors, Ouagadougou, Burkina Faso PDF Version [PDF - 315 KB - 3 pages]
  K. A. Traoré et al.
• Porcine Deltacoronavirus, Thailand, 2015 PDF Version [PDF - 300 KB - 3 pages]
  T. Janetanakit et al.
• Ebola Virus in Breast Milk in an Ebola Virus–Positive Mother with Twin Babies, Guinea, 2015 PDF Version [PDF - 281 KB - 2 pages]
  H. Nordenstedt et al.
• Chronic Infection of Domestic Cats with Feline Morbillivirus, United States PDF Version [PDF - 403 KB - 3 pages]
  C. R. Sharp et al.
• Difficulties in Schistosomiasis Assessment, Corsica, France PDF Version [PDF - 402 KB - 4 pages]
  H. Moné et al.

Books and Media

• Immunity PDF Version [PDF - 208 KB - 1 page]
  T. M. Lee
• One Health: People, Animals, and the Environment PDF Version [PDF - 281 KB - 2 pages]
  C. Behravesh

In Memoriam

• In Memoriam: Sandy Ford (1950–2015) PDF Version [PDF - 429 KB - 2 pages]
  M. G. Schultz and A. B. Bloch

About the Cover

• From Farm to Fable PDF Version [PDF - 308 KB - 2 pages]
  B. Breedlove

Etymologia

• Etymologia: Listeria PDF Version [PDF - 332 KB - 1 page]

Conference Summaries

• Enteric Fever and Invasive Nontyphoidal Salmonellosis—9th International Conference on Typhoid and Invasive NTS Disease, Bali, Indonesia, April 30–May 3, 2015
  M. Khan et al.

Corrections

• Correction: Vol. 21, No. 11 PDF Version [PDF - 353 KB - 1 page]