Skip to main content

Geographic distribution of human leishmaniasis and phlebotomine sand flies in the State of Mato Grosso do Sul, Brazil

Abstract

Background

In the State of Mato Grosso do Sul, Brazil, sand flies and cases of visceral (VL) and cutaneous (CL) leishmaniases have been reported in almost all municipalities. The aim of this study was to analyze the geographic distribution of VL and CL in relation the sand fly species found in the municipalities of Mato Grosso do Sul.

Methods

We analyzed VL and CL cases from 2001 to 2018 using data from the Notifiable Diseases Information System (SINAN). Data collected since 2003 on the presence of sand fly vectors (proven or suspected) were provided by the State Health Secretariat.

Results

A total of 3566 and 3030 cases of VL and CL, respectively, were reported from 2001 to 2018. The municipalities with the most reported cases of VL were Campo Grande (2495), Três Lagoas (442), Corumbá (140) and Aquidauana (136); and those for CL were Campo Grande (635) and Bodoquena (197). The following sand fly species with vector potential were found in 59 municipalities (74.7%): Lutzomyia longipalpis, Lutzomyia cruzi, Nyssomyia whitmani, Migonemyia migonei, Nyssomyia neivai, Pintomyia pessoai, Bichromomyia flaviscutellata and Pintomyia fischeri. Sand flies were present in six municipalities where no cases of VL were reported and in two municipalities where no cases of CL were reported.

Conclusions

Our results indicate that the geographical distribution of VL and CL in Mato Grosso do Sul expanded during the study period, and highlight the presence of sand fly vectors in municipalities where these diseases are currently considered to be non-endemic.

Graphical Abstract

Background

Leishmaniases are a group of diseases caused by protozoa of the genus Leishmania, which are transmitted by the bite of female phlebotomine sand flies. There four main clinical forms of leishmaniasis: visceral leishmaniasis (VL), post-kala-azar dermal leishmaniasis (PKDL), cutaneous leishmaniasis (CL) and mucocutaneous leishmaniasis (MCL) [1]. Among these, VL and CL are the most common clinical forms. VL is the most severe clinical form of the disease, being potentially fatal even in patients receiving treatment. CL ranges clinically from localized skin ulcers to diffuse painless dermal nodules, sometimes evolving to MCL, resulting in ulceration of the oropharynx [2]. Several animals (wildlife and synanthropes) can act as reservoirs of various Leishmania spp., but domestic dogs play a major role as the main reservoir of Leishmania infantum, the causative agent of zoonotic VL [3].

Leishmaniases are endemic in Brazil, which is the largest focus of both VL and CL in the Americas [4]. Among the states in the midwest region of Brazil, Mato Grosso do Sul has the highest VL incidence, whereas Mato Grosso has the highest number of CL cases [5]. Moreover, the lethality of VL in Mato Grosso do Sul is higher than the national average [6]. These data emphasize the need for studies on the epidemiology of both VL and CL in this Brazilian state, which may provide information on the expansion of these diseases in Brazil. In this context, the objective of this study was to describe the geographical distribution of VL and CL cases in the State of Mato Grosso do Sul from 2001 and 2018. The presence of sand fly vectors in endemic and non-endemic municipalities was also evaluated.

Methods

Study area

Taken together, the municipalities of the State of Mato Grosso do Sul, located in the Midwest Region of Brazil, have a total territorial area of 357,145.534 km2. Mato Grosso do Sul is bordered to the east by the States of Minas Gerais and São Paulo, to the south by Paraná State and to the north by the States of Mato Grosso and Goiás, and it has international borders with Bolivia and Paraguay to the west. The state comprises 79 municipalities, divided into 11 microregions, with almost 3 million inhabitants [7].

Depending on the region, Mato Grosso do Sul has the following Köppen climatic classification: Am (coldest temperature and short dry season), Aw (rainy season in summer and dry season in winter), Cfa (hot summers, infrequent frosts, and more concentrated rains in the summer) and Af (no defined dry season) [8].

Data collection

A descriptive study was carried out using secondary data collected on all recorded VL and CL cases in all municipalities of Mato Grosso do Sul between 2001 and 2018. The municipality in which the VL and CL cases were notified (notification municipality) and the infection site were analyzed, using information registered in the Notifiable Diseases Information System (SINAN) and made available in Datasus. The notification municipality is the city where the patient was diagnosed with leishmaniasis and subsequently treated. The infection site is the municipality where the patient resides and where the infection probably occurred.

Data on the collection of sand flies (proven/suspected vector species) were provided by the Entomology Coordination of Dourados of the State Health Secretariat in January 2021. The collection of sand flies was carried out using CDC light traps, between 2003 and 2020. In brief, collections were performed during 3 consecutive nights in approximately 10 sites per municipality (according to local operational capacity). Collection sites were in peridomicile structures (e.g. chicken coops, pigsties and stables) and presented suitable conditions for sand flies. On some occasions (i.e. when VL cases were reported), entomological investigation was also carried out intradomicile. Sand fly identification was performed using the morphological keys proposed by Shimabukuro [9]. In this work, we followed Galati’s nomenclature [10] and used abbreviations of genera and subgenera as proposed by Marcondes [11].

Results

A total of 6596 cases of leishmaniasis were reported from 2001 to 2018 in Mato Grosso do Sul State, of which 3566 were VL and 3030 were CL (Table 1). The average incidence was 35.7 cases/100,000 inhabitants. The years with the most VL cases were 2012 (n = 307) and 2011 (n = 273), with a decrease in the number of cases between 2014 and 2018. Most of the CL cases were reported in 2001 (n = 426) and 2002 (n = 329), with a decrease in the number of reported cases in 2010 and 2017 (Fig. 1).

Table 1 Number of VL and CL cases in municipalities identified as notification site or infection site, and presence of sand fly vectors, during 2001–2018, Mato Grosso do Sul State, Brazil
Fig. 1
figure 1

Number of visceral and cutaneous leishmaniasis cases, 2001–2018, reported in the State of Mato Grosso do Sul, Brazil. Data from the Notifiable Diseases Information System (SINAN). Abbreviations: CL, Cutaneous leishmaniasis; VL, visceral leishmaniasis

The municipalities in which the highest number of total cases (VL and CL combined) were reported were Campo Grande (n = 3,130), Três Lagoas (n = 475), Aquidauana (n = 259), Bodoquena (n = 199), Corumbá (n = 172), Pedro Gomes (n = 141), Coxim (n = 131) and Maracaju (n = 130). The highest number of VL cases were reported in the municipalities of Campo Grande (n = 2495), Três Lagoas (n = 442), Corumbá (n = 140), Aquidauana (n = 136), Anastácio (n = 72) and Dourados (n = 36). The highest number of CL cases were reported in the municipalities of Campo Grande (n = 635), Bodoquena (n = 197), Pedro Gomes (n = 139), Maracajú (n = 125), Aquidauana (n = 123) and Coxim (n = 100) (Table 1).

It was possible to trace the original infection site in 3383 cases of VL and 1987 cases of CL. The municipalities most frequently cited as a infection site of VL cases were Campo Grande (n = 1843), Três Lagoas (n = 470), Corumbá (n = 152), Aquidauana (n = 145) and Anastácio (n = 89). The most frequently reported infection sites for CL were Campo Grande (n = 197), Bodoquena (n = 161), Pedro Gomes (n = 126), Aquidauana (n = 102) and Rio Verde do Mato Grosso (n = 75) (Table 1).

Of the 79 municipalities of Mato Grosso do Sul, 59 (74.7%) reported the presence of at least one of the following proven/suspected sand fly vectors: Bichromomyia flaviscutellata, Lutzomyia longipalpis, Lutzomyia cruzi, Migonemyia migonei, Nyssomyia neivai, Nyssomyia whitmani, Pintomyia fischeri and Pintomyia pessoai (Fig. 2).

Fig. 2
figure 2

Municipalities with reported cases of VL and CL and where sand flies were reported to be present, 2001–2018, Mato Grosso do Sul, Brazil. Data on cases are from the SINAN and sand fly data (collected since 2003) are from the State Health Secretariat

Lutzomyia longipalpis was the most widely distributed vector species, being reported in 44 municipalities, whereas Lu. cruzi was reported in nine municipalities. Nyssomyia whitmani (54 municipalities) was the predominant CL vector, followed by Ny. neivai (21 municipalities), Pi. pessoai (12 municipalities), Bi. flaviscutellata (11 municipalities), Mi. migonei (10 municipalities) and Pi. fischeri (three municipalities) (Fig. 2).

Detailed information on the reported VL and CL cases, original infection sites as well as the presence of proven/suspected sand fly vectors in all municipalities is summarized in Table 1. A total of 15 municipalities had no VL cases or proven/suspected vectors and were not identified as infection sites. Eight municipalities had no reported VL cases or proven/suspected vectors, but were identified as infection sites. Two municipalities had no reported VL cases and were not identified as infection sites, but proven/suspected vectors were present (Table 1).

Regarding CL, only one municipality (Paraíso das Águas) had no CL cases or proven/suspected vectors and was not identified as infection site. Anaurilândia had no CL cases or proven/suspected vectors, but was identified as an infection site. Jaraguari had no CL cases, but was identified as infection site and had proven/suspected vectors present. Finally, Selvíria had no CL cases nor was it identified as infection site, but had proven/suspected vectors (Table 1).

Discussion

Visceral leishmaniasis is traditionally endemic in Mato Grosso do Sul State, but until a number of decades ago the disease was restricted in terms of geographical distribution, with its distribution from 1913 to 1993 limited to the municipalities of Corumbá and Ladário. With the construction of the Bolivia-Brazil gas pipeline, the railroad and federal highway BR-262, VL extended its distribution in Mato Grosso do Sul and reached other cities/municipalities, such as Campo Grande, Três Lagoas and Aquidauana [12]. Data summarized in this study demonstrate a further expansion of VL, which now occurs in 62.0% (49/79) of the municipalities of Mato Grosso do Sul. CL is even more widespread in this state, with cases reported in 94.9% (75/79) of the municipalities; two other municipalities have also been identified as infection sites for reported CL cases.

The expansion of VL in Mato Grosso do Sul could be related to several factors, including human population movements, environmental changes, poor housing and nutritional conditions of the populations at risk, widespread presence of Lu. longipalpis and absence of systematic vector control measures [12, 13]. This study also highlights that many patients needed to go to another municipality to seek healthcare services, which may potentially result in delayed diagnosis and treatment [14]. Indeed, in many cases, the municipality responsible for the notification differed from the original infection site.

Only four municipalities were identified as not reporting CL cases: Anaurilândia, Jaraguari, Paraíso das Águas and Selvíria. This absence of reported CL cases may be due to the absence of the disease in these municipalities or to underreporting. All four of these municipalities are bordered by municipalities with reported cases, which certainly suggests that there is a risk for CL introduction, if it not already present. Indeed, Anaurilândia and Jaraguari were identified as the probable original infection sites.

The notification forms assessed in this study were incomplete for many reported VL/CL cases, with at least one piece of missing information. This problem has also been reported by other researchers [15], which highlights the need for improving both data capture form compilation and data entry in SINAN.

The occurrence of VL and CL cases in most municipalities of Mato Grosso do Sul State indicates the presence of sand fly vectors in these municipalities. Of 71 sand fly species registered in Mato Grosso do Sul [16], eight are considered to be of medical significance [16, 17].

Regarding the vectors of Leishmania infantum (VL), there was a predominance of Lu. longipalpis, followed by Lu. cruzi, corroborating the findings of other studies [13, 18]. Our results suggest the expansion of the distribution of Lu. longipalpis in Mato Grosso do Sul State. Barrios et al. [16] did not detect the presence of Lu. longipalpis in Bandeirantes, São Gabriel do Oeste and Sonora municipalities. This geographical expansion of this vector may be influenced by deforestation [20] and agricultural enterprises [21], both human activities which may lead to an expansion of VL in the state. Migonemyia migonei (a permissive vector of L. infantum [22]) was also found in municipalities with cases of VL. Regarding vectors of Leishmania braziliensis and Leishmania amazonensis (causative agents of CL), there was a predominance of Ny. whitmani and Ny. neivai (25.3%), as reported previously [13, 19, 23].

Further entomological studies are needed in municipalities with reported cases but where with no sand fly vectors have been reported so far. The use of different trapping methods, with a higher number of traps and the installation of traps in different locations, may revel the presence of sand fly vectors in these municipalities. In the same way, healthcare professionals working in municipalities with a confirmed presence of sand fly vectors but with no leishmaniasis cases should be advised to actively search out possible new cases. This is pivotal to identifiy possible failures in the notification system and also to provide early diagnosis and treatment for affected patients.

Conclusion

Our study indicates that the geographical distribution of VL and CL in Mato Grosso do Sul State during the study period has expanded, and highlights the presence of sand fly vectors in municipalities where these diseases are currently considered to be non-endemic.

Abbreviations

CL:

cutaneous leishmaniasis

VL:

visceral leishmaniasis

References

  1. De Brito RCF, Aguiar-Soares RDO, Cardoso JMO, Coura-Vital W, Roatt BM, Reis AB. Recent advances and new strategies in Leishmaniasis diagnosis. Appl Microbiol Biotechnol. 2020;104:8105–16.

    Article  Google Scholar 

  2. Handler MZ, Patel PA, Kapila R, Al-Qubati Y, Schwartz RA. Cutaneous and mucocutaneous leishmaniasis: clinical perspectives. J Am Acad Dermatol. 2015;73:897–908.

    Article  Google Scholar 

  3. Molina R, Jiménez M, García-Martínez J, San Martín JV, Carrillo E, Sánchez C, et al. Role of asymptomatic and symptomatic humans as reservoirs of visceral leishmaniasis in a Mediterranean context. PLoS Negl Trop Dis. 2020;14:e0008253.

    Article  Google Scholar 

  4. Pan American Health Organization (PAHO). Leishmanioses. 2017. http://www.paho.org/hq/index.php?option=com_topics&view=article&id=29&Itemid=40754. Accessed 2 Mar 2022.

  5. Tauil PL. Perspectives of vector borne diseases control in Brazil. Rev Soc Bras Med Trop. 2006;39:275–7.

    Article  Google Scholar 

  6. Notifiable Diseases Information System (SINAN). Leishmaniose visceral. 2021. http://www.portalsinan.saude.gov.br/leishmaniose-visceral. Accessed 2 Mar 2022.

  7. Instituto Brasileiro de Geografia e Estatística (IBGE). Cidades e Estados. 2020. https://www.ibge.gov.br/cidades-e-estados/ms/dourados.html. Accessed 2 Mar 2022.

  8. Empresa Brasileira de Pesquisa Agropecuária (EMBRAPA). Espécies Arbóreas Brasileiras: Clima. 2016. http://www.cnpf.embrapa.br/pesquisa/efb/clima.htm. Accessed 2 Mar 2022.

  9. Shimabukuro PHF, Tolezano JE, Galati EAB. Chave de identificação dos Phlebotominae. Pap Avulsos Zool. 2011;51:399–441.

    Article  Google Scholar 

  10. Galati EAB. Phlebotominae (Diptera, Psychodidae): classification, morphology and terminology of adults and identification of American Taxa. In: Rangel EF, Shaw JJ, editors. Brazilian sand flies: biology, taxonomy, medical importance and control. Berlin: Springer International Publishing; 2018. p. 9–212.

    Chapter  Google Scholar 

  11. Marcondes CB. A proposal of generic and subgeneric abbreviations for phlebotomine sandflies (Diptera: Psychodidae: Phlebotominae) of the world. Entomol News. 2007;118:351–6.

    Article  Google Scholar 

  12. Antonialli SAC, Torres TG, Paranhos Filho AC, Tolezano JE. Spatial analysis of American visceral leishmaniasis in Mato Grosso do Sul State, Central Brazil. J Infect. 2007;54:509–14.

    Article  Google Scholar 

  13. Almeida OS, Sciamarelli A, Batista PM, Ferreira AD, Nascimento J, Raizer J, et al. Predicting the geographic distribution of Lutzomyia longipapis (Diptera: Psychodidae) and visceral leishmaniasis in the state of Mato Grosso do Sul, Brazil. Mem Inst Oswaldo Cruz. 2013;108:992–6.

    Article  Google Scholar 

  14. Clementino JO, Abrahão DGM, Lima Junior MSC, Neitzke-Abre HC. Coinfection and delayed diagnosis of visceral leishmaniasis: died predecessors factors. Case Rep Clin Pathol. 2019;6:19–22.

    Article  Google Scholar 

  15. Maia-Elkhoury ANS, Carmo EH, Sousa-Gomes ML, Mota E. Análise dos registros de leishmaniose visceral pelo método de captura-recaptura. Rev Saúde Pública. 2007;41:931–7.

    Article  Google Scholar 

  16. Barrios SPG, Pereira LE, Casaril AE, Infran FOM, Fernandes WS, Oshiro ET, et al. Phlebotominae (Diptera: Psychodidae) and biomes in the State of Mato Grosso do Sul, Brazil. J Med Entomol. 2020;57:1882–904.

    Article  Google Scholar 

  17. Silva EA, Andreotti R, Dias ES, Barros JC, Brazuna JCM. Detection of Leishmania DNA in phlebotomines captured in Campo Grande, Mato Grosso do Sul, Brazil. Exp Parasitol. 2008;119:343–8.

    CAS  Article  Google Scholar 

  18. Almeida PS, Nascimento JC, Ferreira AD, Minzão LD, Pontes FM, Miranda AM, et al. Espécies de flebotomíneos (Diptera: Psychodidae) coletadas em ambiente urbano em municípios com transmissão de leishmaniose visceral do Estado de Mato Grosso do Sul. Brasil Rev Bras Entomol. 2010;54:304–10.

    Article  Google Scholar 

  19. Almeida PS, Andrade AJ, Sciamarelli A, Raizer J, Menegatti JÁ, Hermes SCNM, et al. Geographic distribution of phlebotomine sandfly species (Diptera: Psychodidae) in Central-West Brazil. Mem Inst Oswaldo Cruz. 2015;110:551–9.

    Article  Google Scholar 

  20. Adel A, Boughoufalah A, Saegerman C, De Deken R, Bouchene Z, Soukehal A, et al. Epidemiology of visceral leishmaniasis in Algeria: an update. PLoS ONE. 2014;9:e99207.

    Article  Google Scholar 

  21. Peterson AT, Campbell LP, Moo-Llanes DA, Travi B, González C, Ferro MC, et al. Influences of climate change on the potential distribution of Lutzomyia longipalpis sensu lato (Psychodidae: Phlebotominae). Int J Parasitol. 2017;47:667–74.

    Article  Google Scholar 

  22. Guimarães VCFV, Pruzinova K, Sadlova J, Volfova V, Myskova J, Brandão Filho SP, et al. Lutzomyia migonei is a permissive vector competent for Leishmania infantum. Parasit Vectors. 2016;9:159.

    Article  Google Scholar 

  23. Neitzke-Abreu HC, Reinhold-Castro KR, Fenelon VC, Massafera R, Truppel J, Otomura FH, et al. Sandfly fauna and behavior (Diptera: Psychodidae) in municipalities of the Mesoregion North Pioneer of Paraná, Brazil. Rev Bras Entomol. 2020;64:e20200074.

    Article  Google Scholar 

Download references

Acknowledgements

The authors would like to thank the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) for the scholarship, the Fundação de Apoio ao Desenvolvimento de Ensino, Ciência e Tecnologia do Mato Grosso do Sul (FUNDECT) for the financial support (Process 59/300.063/2015), the Universidade Federal da Grande Dourados (UFGD) for reviewing the English (PAP-PROPP no. 02/2021) and the health agents Lourival Soares Barbosa, Sérgio Novaes and José de Oliveira da Silva for their assistance in sand fly collection.

Funding

Not applicable.

Author information

Authors and Affiliations

Authors

Contributions

MNS: performed data curation. GBC, EP, and ASC: interpreted the results, wrote the original draft of the manuscript and designed the visualization. HCNA, PSA, and MSCLJ: reviewed and edited the final manuscript. All authors read and approved the fnal manuscript.

Corresponding author

Correspondence to Herintha Coeto Neitzke-Abreu.

Ethics declarations

Ethics approval and consent to participate

Not applicable.

Consent for publication

Not applicable.

Competing interests

The authors declare that there are no competing interests in the development of the research.

Additional information

Publisher's Note

Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

Rights and permissions

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated in a credit line to the data.

Reprints and Permissions

About this article

Verify currency and authenticity via CrossMark

Cite this article

Neitzke-Abreu, H.C., Costa, G.B., da Silva, M.N. et al. Geographic distribution of human leishmaniasis and phlebotomine sand flies in the State of Mato Grosso do Sul, Brazil. Parasites Vectors 15, 227 (2022). https://doi.org/10.1186/s13071-022-05353-0

Download citation

  • Received:

  • Accepted:

  • Published:

  • DOI: https://doi.org/10.1186/s13071-022-05353-0

Keywords

  • Visceral leishmaniasis
  • Cutaneous leishmaniasis
  • Sand flies
  • Disease notification
  • Information system
  • Vectors