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Nooh F, Chernet A, Reither K, Okuma J, Brattig NW, Utzinger J, Probst-Hensch N, Paris DH, Dreyfus A. Prevalence of fever of unidentified aetiology in East African adolescents and adults: a systematic review and meta-analysis. Infect Dis Poverty 2023; 12:55. [PMID: 37231500 DOI: 10.1186/s40249-023-01105-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2023] [Accepted: 05/16/2023] [Indexed: 05/27/2023] Open
Abstract
BACKGROUND Primary health care settings and hospitals of low- and middle-income countries have few accessible diagnostic tools and limited laboratory and human resources capacity to identify multiple pathogens with high accuracy. In addition, there is a paucity of information on fever and its underlying aetiology in the adolescent and adult population in East Africa. The purpose of this study was to estimate the pooled prevalence of fever of unidentified aetiology among adolescent and adult febrile patients seeking health care in East Africa. METHODS We pursued a systematic review using readily available electronic databases (i.e. PubMed, Cumulative Index to Nursing & Allied Health Literature, Scopus, Cochrane Library and Web of Science) without language restriction from inception date of the respective databases to October 31, 2022. We adhered to the Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines. Identified studies were screened for relevance. Further analyses based on pre-set eligibility criteria were carried out for final inclusion. Two reviewers independently screened and extracted data. Risk of study bias was assessed. Meta-analysis of the prevalence of fever of unidentified aetiology was performed. RESULTS We identified 14,029 articles of which 25 were eligible for inclusion, reporting data from 8538 participants. The pooled prevalence of febrile cases with unidentified aetiology was 64% [95% confidence interval (CI): 51-77%, I2 = 99.6%] among febrile adolescents and adults in East Africa. For the proportion of patients with identified aetiology, the studies documented bacterial pathogens (human bloodstream infections), bacterial zoonotic pathogens and arboviruses as the main non-malarial causative agents in East Africa. CONCLUSIONS Our study provides evidence that almost two-thirds of adolescent and adult febrile patients attending health care facilities in East Africa might receive inappropriate treatments due to unidentified potential life-threatening fever aetiology. Hence, we call for a comprehensive fever syndromic surveillance to broaden a consequential differential diagnosis of syndromic fever and to considerably improve the course of patients' disease and treatment outcomes.
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Affiliation(s)
- Faisal Nooh
- Swiss Tropical and Public Health Institute, Kreuzstrasse 2, 4123, Allschwil, Switzerland.
- University of Basel, Basel, Switzerland.
- College of Medicine and Health Sciences, Jigjiga University, Jigjiga, Ethiopia.
- College of Medicine and Health Sciences, University of Hargeisa, Hargeisa, Somaliland.
| | - Afona Chernet
- Swiss Tropical and Public Health Institute, Kreuzstrasse 2, 4123, Allschwil, Switzerland
- University of Basel, Basel, Switzerland
| | - Klaus Reither
- Swiss Tropical and Public Health Institute, Kreuzstrasse 2, 4123, Allschwil, Switzerland
- University of Basel, Basel, Switzerland
| | - James Okuma
- Swiss Tropical and Public Health Institute, Kreuzstrasse 2, 4123, Allschwil, Switzerland
- University of Basel, Basel, Switzerland
| | - Norbert W Brattig
- Department Infectious Disease Epidemiology, Bernhard Nocht Institute for Tropical Medicine, Hamburg, Germany
| | - Jürg Utzinger
- Swiss Tropical and Public Health Institute, Kreuzstrasse 2, 4123, Allschwil, Switzerland
- University of Basel, Basel, Switzerland
| | - Nicole Probst-Hensch
- Swiss Tropical and Public Health Institute, Kreuzstrasse 2, 4123, Allschwil, Switzerland
- University of Basel, Basel, Switzerland
| | - Daniel H Paris
- Swiss Tropical and Public Health Institute, Kreuzstrasse 2, 4123, Allschwil, Switzerland
- University of Basel, Basel, Switzerland
| | - Anou Dreyfus
- Swiss Tropical and Public Health Institute, Kreuzstrasse 2, 4123, Allschwil, Switzerland
- University of Basel, Basel, Switzerland
- Section of Epidemiology, University of Zürich, Zurich, Switzerland
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Mariki M, Mduma N, Mkoba E. Characterisation of Malaria Diagnosis Data in High and Low Endemic Areas of Tanzania. East Afr Health Res J 2022; 6:171-179. [PMID: 36751682 PMCID: PMC9887499 DOI: 10.24248/eahrj.v6i2.696] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2021] [Accepted: 11/25/2022] [Indexed: 01/01/2023] Open
Abstract
Background Malaria remains a significant cause of morbidity and mortality, especially in the sub-Saharan African region. Malaria is considered preventable and treatable, but in recent years, it has increased outpatient visits, hospitalisation, and deaths worldwide, reaching a 9% prevalence in Tanzania. With the massive number of patient records in the health facilities, this study aims to understand the key characteristics and trends of malaria diagnostic symptoms, testing and treatment data in Tanzania's high and low endemic regions. Methods This study had retrospective and cross-sectional designs. The data were collected from four facilities in two regions in Tanzania, i.e., Morogoro Region (high endemicity) and Kilimanjaro Region (low endemicity). Firstly, malaria patient records were extracted from malaria patients' files from 2015 to 2018. Data collected include (i) the patient's demographic information, (ii) the symptoms presented by the patient when consulting a doctor, (iii) the tests taken and results, (iv) diagnosis based on the laboratory results and (v) the treatment provided. Apart from that, we surveyed patients who visited the health facility with malaria-related symptoms to collect extra information such as travel history and the use of malaria control initiatives such as insecticide-treated nets. A descriptive analysis was generated to identify the frequency of responses. Correlation analysis random effects logistic regression was performed to determine the association between malaria-related symptoms and positivity. Significant differences of p < 0.05 (i.e., a Confidence Interval of 95%) were accepted. Results Of the 2556 records collected, 1527(60%) were from the high endemic area, while 1029(40%) were from the low endemic area. The most observed symptoms were the following: for facilities in high endemic regions was fever followed by headache, vomiting and body pain; for facilities in the low endemic region was high fever, sweating, fatigue and headache. The results showed that males with malaria symptoms had a higher chance of being diagnosed with malaria than females. Most patients with fever had a high probability of being diagnosed with malaria. From the interview, 68% of patients with malaria-related symptoms treated themselves without proper diagnosis. Conclusions Our data indicate that proper malaria diagnosis is a significant concern. The majority still self-medicate with anti-malaria drugs once they experience any malaria-related symptoms. Therefore, future studies should explore this challenge and investigate the potentiality of using malaria diagnosis records to diagnose the disease.
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Affiliation(s)
- Martina Mariki
- Department of Information Communication Science and Engineering, Nelson Mandela African Institution of Science and Technology, Arusha, Tanzania
| | - Neema Mduma
- Department of Information Communication Science and Engineering, Nelson Mandela African Institution of Science and Technology, Arusha, Tanzania
| | - Elizabeth Mkoba
- Department of Information Communication Science and Engineering, Nelson Mandela African Institution of Science and Technology, Arusha, Tanzania
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Manabe YC, Betz J, Jackson O, Asoala V, Bazan I, Blair PW, Chang A, Chusri S, Crump JA, Edgel KA, Faix DJ, Fernandez S, Fox AT, Garcia JA, Grogl M, Hansen EA, Heang V, House SL, Jongsakul K, Kaburise MB, Klungthong C, Lamorde M, Letizia AG, Lorenzana I, Luy M, Maro VP, Mores CN, Myers CA, Oduro AR, Parham L, Porzucek AJ, Prouty M, Rabiger DS, Rubach MP, Siles C, Silva M, Ukachu C, Waitumbi JN, Phillips CL, Jones BW. Clinical evaluation of the BioFire Global Fever Panel for the identification of malaria, leptospirosis, chikungunya, and dengue from whole blood: a prospective, multicentre, cross-sectional diagnostic accuracy study. THE LANCET. INFECTIOUS DISEASES 2022; 22:1356-1364. [PMID: 35716700 PMCID: PMC9420791 DOI: 10.1016/s1473-3099(22)00290-0] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/01/2022] [Revised: 03/27/2022] [Accepted: 04/12/2022] [Indexed: 12/29/2022]
Abstract
BACKGROUND Acute febrile illness is a common presentation for patients at hospitals globally. Assays that can diagnose a variety of common pathogens in blood could help to establish a diagnosis for targeted disease management. We aimed to evaluate the performance of the BioFire Global Fever Panel (GF Panel), a multiplex nucleic acid amplification test performed on whole blood specimens run on the BioFire FilmArray System, in the diagnosis of several pathogens that cause acute febrile illness. METHODS We did a prospective, multicentre, cross-sectional diagnostic accuracy study to evaluate the GF Panel. Consenting adults and children older than 6 months presenting with fever in the previous 2 days were enrolled consecutively in sub-Saharan Africa (Ghana, Kenya, Tanzania, Uganda), southeast Asia (Cambodia, Thailand), central and South America (Honduras, Peru), and the USA (Washington, DC; St Louis, MO). We assessed the performance of six analytes (chikungunya virus, dengue virus [serotypes 1-4], Leptospira spp, Plasmodium spp, Plasmodium falciparum, and Plasmodium vivax or Plasmodium ovale) on the GF Panel. The performance of the GF Panel was assessed using comparator PCR assays with different primers followed by bidirectional sequencing on nucleic acid extracts from the same specimen. We calculated the positive percent agreement and negative percent agreement of the GF Panel with respect to the comparator assays. This study is registered with ClinicalTrials.gov, NCT02968355. FINDINGS From March 26, 2018, to Sept 30, 2019, 1965 participants were enrolled at ten sites worldwide. Of the 1875 participants with analysable results, 980 (52·3%) were female and the median age was 22 years (range 0-100). At least one analyte was detected in 657 (35·0%) of 1875 specimens. The GF Panel had a positive percent agreement for the six analytes evaluated as follows: chikungunya virus 100% (95% CI 86·3-100), dengue virus 94·0% (90·6-96·5), Leptospira spp 93·8% (69·8-99·8), Plasmodium spp 98·3% (96·3-99·4), P falciparum 92·7% (88·8-95·6), and P vivax or P ovale 92·7% (86·7-96·6). The GF Panel had a negative percent agreement equal to or greater than 99·2% (98·6-99·6) for all analytes. INTERPRETATION This 1 h sample-to-answer, molecular device can detect common causative agents of acute febrile illness with excellent positive percent agreement and negative percent agreement directly in whole blood. The targets of the assay are prevalent in tropical and subtropical regions globally, and the assay could help to provide both public health surveillance and individual diagnoses. FUNDING BioFire Defense, Joint Project Manager for Medical Countermeasure Systems and US Army Medical Materiel Development Activity, and National Institute of Allergy and Infectious Diseases.
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Affiliation(s)
- Yukari C Manabe
- Division of Infectious Diseases, Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, MD, USA; Infectious Diseases Institute, Makerere University College of Health Sciences, Kampala, Uganda.
| | - Joshua Betz
- Department of Biostatistics, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA
| | | | - Victor Asoala
- Navrongo Health Research Centre, Ghana Health Service, Navrongo, Ghana
| | - Isabel Bazan
- Virology and Emerging Infections Department, US Naval Medical Research Unit Six, Lima, Peru
| | - Paul W Blair
- Division of Infectious Diseases, Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Aileen Chang
- Department of Medicine, School of Medicine and Health Sciences, George Washington University, Washington, DC, USA
| | - Sarunyou Chusri
- Faculty of Medicine, Prince of Songkhla University, Songkhla, Thailand
| | - John A Crump
- Division of Infectious Diseases & International Health, Department of Medicine, Duke University, Durham, NC, USA; Centre for International Health, University of Otago, Dunedin, New Zealand
| | | | - Dennis J Faix
- US Naval Medical Research Unit Two, Phnom Penh, Cambodia
| | - Stefan Fernandez
- Department of Virology, Armed Forces Research Institute of Medical Sciences, Bangkok, Thailand
| | - Anne T Fox
- US Naval Medical Research Unit Three, Ghana Detachment, Accra, Ghana
| | - Jose A Garcia
- US Naval Medical Research Unit Two, Phnom Penh, Cambodia
| | - Max Grogl
- Virology and Emerging Infections Department, US Naval Medical Research Unit Six, Lima, Peru
| | - Erin A Hansen
- Operational Infectious Diseases, Naval Health Research Center, San Diego, CA, USA
| | - Vireak Heang
- US Naval Medical Research Unit Two, Phnom Penh, Cambodia
| | - Stacey L House
- Washington University School of Medicine, Department of Emergency Medicine, St Louis, MO, USA
| | - Krisada Jongsakul
- Department of Bacterial and Parasitic Diseases, Armed Forces Research Institute of Medical Sciences, Bangkok, Thailand
| | | | - Chonticha Klungthong
- Department of Virology, Armed Forces Research Institute of Medical Sciences, Bangkok, Thailand
| | - Mohammed Lamorde
- Infectious Diseases Institute, Makerere University College of Health Sciences, Kampala, Uganda
| | - Andrew G Letizia
- US Naval Medical Research Unit Three, Ghana Detachment, Accra, Ghana
| | - Ivette Lorenzana
- Universidad Nacional Autónoma de Honduras, Centro de Investigaciones Geneticas, Instituto de Investigacion en Microdbiologia, Tegucigalpa, Honduras
| | - Malen Luy
- US Naval Medical Research Unit Two, Phnom Penh, Cambodia
| | - Vanance P Maro
- Department of Medicine, Kilimanjaro Christian Medical University College, Moshi, Tanzania
| | - Christopher N Mores
- Virology and Emerging Infections Department, US Naval Medical Research Unit Six, Lima, Peru; Department of Global Health, Milken Institute School of Public Health, George Washington University, Washington, DC, USA
| | - Christopher A Myers
- Operational Infectious Diseases, Naval Health Research Center, San Diego, CA, USA
| | - Abraham R Oduro
- Navrongo Health Research Centre, Ghana Health Service, Navrongo, Ghana
| | - Leda Parham
- Universidad Nacional Autónoma de Honduras, Centro de Investigaciones Geneticas, Instituto de Investigacion en Microdbiologia, Tegucigalpa, Honduras
| | - Abigail J Porzucek
- Department of Global Health, Milken Institute School of Public Health, George Washington University, Washington, DC, USA
| | - Michael Prouty
- Virology and Emerging Infections Department, US Naval Medical Research Unit Six, Lima, Peru
| | | | - Matthew P Rubach
- Division of Infectious Diseases & International Health, Department of Medicine, Duke University, Durham, NC, USA
| | - Crystyan Siles
- Virology and Emerging Infections Department, US Naval Medical Research Unit Six, Lima, Peru
| | - Maria Silva
- Virology and Emerging Infections Department, US Naval Medical Research Unit Six, Lima, Peru
| | - Chinaka Ukachu
- Operational Infectious Diseases, Naval Health Research Center, San Diego, CA, USA
| | - John N Waitumbi
- US Army Medical Research Directorate-Africa, Kenya Medical Research Institute, Nairobi, Kenya
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Hogendoorn SKL, Lhopitallier L, Richard-Greenblatt M, Tenisch E, Mbarack Z, Samaka J, Mlaganile T, Mamin A, Genton B, Kaiser L, D'Acremont V, Kain KC, Boillat-Blanco N. Clinical sign and biomarker-based algorithm to identify bacterial pneumonia among outpatients with lower respiratory tract infection in Tanzania. BMC Infect Dis 2022; 22:39. [PMID: 34991507 PMCID: PMC8735728 DOI: 10.1186/s12879-021-06994-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2021] [Accepted: 12/13/2021] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Inappropriate antibiotics use in lower respiratory tract infections (LRTI) is a major contributor to resistance. We aimed to design an algorithm based on clinical signs and host biomarkers to identify bacterial community-acquired pneumonia (CAP) among patients with LRTI. METHODS Participants with LRTI were selected in a prospective cohort of febrile (≥ 38 °C) adults presenting to outpatient clinics in Dar es Salaam. Participants underwent chest X-ray, multiplex PCR for respiratory pathogens, and measurements of 13 biomarkers. We evaluated the predictive accuracy of clinical signs and biomarkers using logistic regression and classification and regression tree analysis. RESULTS Of 110 patients with LRTI, 17 had bacterial CAP. Procalcitonin (PCT), interleukin-6 (IL-6) and soluble triggering receptor expressed by myeloid cells-1 (sTREM-1) showed an excellent predictive accuracy to identify bacterial CAP (AUROC 0.88, 95%CI 0.78-0.98; 0.84, 0.72-0.99; 0.83, 0.74-0.92, respectively). Combining respiratory rate with PCT or IL-6 significantly improved the model compared to respiratory rate alone (p = 0.006, p = 0.033, respectively). An algorithm with respiratory rate (≥ 32/min) and PCT (≥ 0.25 μg/L) had 94% sensitivity and 82% specificity. CONCLUSIONS PCT, IL-6 and sTREM-1 had an excellent predictive accuracy in differentiating bacterial CAP from other LRTIs. An algorithm combining respiratory rate and PCT displayed even better performance in this sub-Sahara African setting.
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Affiliation(s)
- Sarika K L Hogendoorn
- Infectious Diseases Service, University Hospital and University of Lausanne, Lausanne, Switzerland.
| | - Loïc Lhopitallier
- Infectious Diseases Service, University Hospital and University of Lausanne, Lausanne, Switzerland
| | - Melissa Richard-Greenblatt
- Tropical Disease Unit, Department of Medicine, Sandra Rotman Centre for Global Health, University Health Network-Toronto General Hospital, University of Toronto, Toronto, Canada
| | - Estelle Tenisch
- Department of Radiology, University Hospital and University of Lausanne, Lausanne, Switzerland
| | - Zainab Mbarack
- Mwananyamala Hospital, Dar es Salaam, United Republic of Tanzania
| | - Josephine Samaka
- Ifakara Health Institute, Dar es Salaam, United Republic of Tanzania
| | - Tarsis Mlaganile
- Ifakara Health Institute, Dar es Salaam, United Republic of Tanzania
| | - Aline Mamin
- Division of Infectious Diseases and Center for Emerging Viral Diseases, University of Geneva Hospitals, and Faculty of Medicine, Geneva, Switzerland
| | - Blaise Genton
- Center for Primary Care and Public Health, University of Lausanne, Lausanne, Switzerland.,Swiss Tropical and Public Health Institute, University of Basel, Basel, Switzerland
| | - Laurent Kaiser
- Division of Infectious Diseases and Center for Emerging Viral Diseases, University of Geneva Hospitals, and Faculty of Medicine, Geneva, Switzerland
| | - Valérie D'Acremont
- Center for Primary Care and Public Health, University of Lausanne, Lausanne, Switzerland.,Swiss Tropical and Public Health Institute, University of Basel, Basel, Switzerland
| | - Kevin C Kain
- Tropical Disease Unit, Department of Medicine, Sandra Rotman Centre for Global Health, University Health Network-Toronto General Hospital, University of Toronto, Toronto, Canada
| | - Noémie Boillat-Blanco
- Infectious Diseases Service, University Hospital and University of Lausanne, Lausanne, Switzerland.,Ifakara Health Institute, Dar es Salaam, United Republic of Tanzania.,Center for Primary Care and Public Health, University of Lausanne, Lausanne, Switzerland
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Virhia J. Contextualising health seeking behaviours for febrile illness: Lived experiences of farmers in northern Tanzania. Health Place 2021; 73:102710. [PMID: 34801785 DOI: 10.1016/j.healthplace.2021.102710] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/17/2021] [Revised: 11/03/2021] [Accepted: 11/06/2021] [Indexed: 01/09/2023]
Abstract
Understanding how people seek treatment for febrile illness can provide important insights into when care is sought and under what circumstances. This is includes examining how people engage with health facilities and the barriers to care they experience. However, a focus on individual actions runs the risk of overemphasising the agency of individuals to make apt health decisions while underestimating the ways which health behaviours are circumscribed by their place-specific social, historic and political contexts. Drawing on the experiences of approximately 100 farmers in a small livestock keeping community in northern Tanzania, this study uses biosocial theory of health to better understand how febrile illness is managed among individuals. The paper draws attention to the ways in which health decisions are mediated by individual, intrinsic and extrinsic health system factors. Some extrinsic factors (such as hospital user fees) are legacies of neoliberal healthcare reform policies which continue to have consequences for how people manage febrile illness in Tanzania. The findings highlight the need for considerations of health behaviours to look beyond the individual and to appreciate the role of the wider health landscape in influencing individual choice and agency when seeking treatment for illness.
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Affiliation(s)
- Jennika Virhia
- Institute of Health & Wellbeing/School of Social & Political Sciences, 27 Bute Gardens, University of Glasgow, G12 8RS, UK.
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Motto SK, Shirima GM, de Clare Bronsvoort BM, Cook EAJ. Epidemiology of leptospirosis in Tanzania: A review of the current status, serogroup diversity and reservoirs. PLoS Negl Trop Dis 2021; 15:e0009918. [PMID: 34784354 PMCID: PMC8631673 DOI: 10.1371/journal.pntd.0009918] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2021] [Revised: 11/30/2021] [Accepted: 10/16/2021] [Indexed: 11/18/2022] Open
Abstract
Background Tanzania is among the tropical countries of Sub-Saharan Africa with the environmental conditions favorable for transmission of Leptospira. Leptospirosis is a neglected zoonotic disease, and although there are several published reports from Tanzania, the epidemiology, genetic diversity of Leptospira and its host range are poorly understood. Methods We conducted a comprehensive review of human and animal leptospirosis within the 26 regions of the Tanzanian mainland. Literature searches for the review were conducted in PubMed and Google Scholar. We further manually identified studies from reference lists among retrieved studies from the preliminary search. Results We identified thirty-four studies describing leptospirosis in humans (n = 16), animals (n = 14) and in both (n = 4). The number of studies varied significantly across regions. Most of the studies were conducted in Morogoro (n = 16) followed by Kilimanjaro (n = 9) and Tanga (n = 5). There were a range of study designs with cross-sectional prevalence studies (n = 18), studies on leptospirosis in febrile patients (n = 13), a case control study in cattle (n = 1) and studies identifying novel serovars (n = 2). The most utilized diagnostic tool was the microscopic agglutination test (MAT) which detected antibodies to 17 Leptospira serogroups in humans and animals. The Leptospira serogroups with the most diverse hosts were Icterohaemorrhagiae (n = 11), Grippotyphosa (n = 10), Sejroe (n = 10), Pomona (n = 9) and Ballum (n = 8). The reported prevalence of Leptospira antibodies in humans ranged from 0.3–29.9% and risk factors were associated with occupational animal contact. Many potential reservoir hosts were identified with the most common being rodents and cattle. Conclusion Leptospirosis is prevalent in humans and animals in Tanzania, although there is regional and host variation in the reports. Many regions do not have information about the disease in either humans or their animal reservoirs. More studies are required to understand human leptospirosis determinants and the role of livestock in leptospirosis transmission to humans for the development of appropriate control strategies. Bacteria from the genus Leptospira is an important agent for causing a disease called leptospirosis in humans and a range of animal species. Leptospirosis is often under-recognized as it presents varied symptoms that mimic malaria, typhoid, brucellosis and other diseases. More than 250 pathogenic Leptospira serovars are known to cause leptospirosis in humans and animals. The diversity of Leptospira serovars and their distribution in humans and animals is little defined in Tanzania. We conducted a systematic review to gather information on the diversity of Leptospira serovars with their reservoir distribution and the most common diagnostics methods used. We included studies (n = 34) in the review and found 17 serogroups described in 28 studies that utilized microscopic agglutination test (MAT). So far human and other animal hosts including cattle, dogs, pigs, bats, buffalo, fish, rodents, goats, lion, zebra, sheep and shrews have been investigated for leptospirosis in Tanzania. Our results show that cattle and rodents are likely to be important reservoirs of pathogenic Leptospira spp. and can be a source of human leptospirosis principally in the farming system. Further studies are needed to explore predominant serovars in livestock for the development of prevention strategies to reduce transmission and risks in humans.
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Affiliation(s)
- Shabani Kiyabo Motto
- Department of Global Health and Bio-Medical Sciences, School of Life Science and Bio-engineering, The Nelson Mandela African Institution of Science and Technology, Arusha, Tanzania
- Tanzania Veterinary Laboratory Agency, Central Veterinary Laboratory, Dar es Salaam, Tanzania
- * E-mail: (SKM); (EAJC)
| | - Gabriel Mkilema Shirima
- Department of Global Health and Bio-Medical Sciences, School of Life Science and Bio-engineering, The Nelson Mandela African Institution of Science and Technology, Arusha, Tanzania
| | - Barend Mark de Clare Bronsvoort
- The Roslin Institute, University of Edinburgh, Easter Bush, United Kingdom
- Centre for Tropical Livestock Genetics and Health, The Roslin Institute, University of Edinburgh, Easter Bush, United Kingdom
| | - Elizabeth Anne Jessie Cook
- International Livestock Research Institute (ILRI), Nairobi, Kenya
- Centre for Tropical Livestock Genetics and Health, ILRI, Nairobi, Kenya
- * E-mail: (SKM); (EAJC)
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Larsen CS. What causes fever in Côte d'Ivoire? Travel Med Infect Dis 2021; 43:102147. [PMID: 34339861 DOI: 10.1016/j.tmaid.2021.102147] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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