A Retrospective Survey of Rodent-borne Viruses in Rural Populations of Brazilian Amazon

Fernandes, Jorlan; Coelho, Thayssa Alves; Oliveira, Renata Carvalho de; Guterres, Alexandro; Vitral, Claudia Lamarca; Teixeira, Bernardo Rodrigues; Santos, Fernando de Oliveira; Oliveira, Jaqueline Mendes de; Silva-Nunes, Mônica da; Horta, Marco Aurélio Pereira; Levis, Silvana C.; Ferreira, Marcelo Urbano; Lemos, Elba Regina Sampaio de

doi:10.1590/0037-8682-0511-2019

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Short Communication • Rev. Soc. Bras. Med. Trop. 53 • 2020 • https://doi.org/10.1590/0037-8682-0511-2019 copy

A Retrospective Survey of Rodent-borne Viruses in Rural Populations of Brazilian Amazon

Authorship SCIMAGO INSTITUTIONS RANKINGS

Abstract

INTRODUCTION:

The Amazon tropical rainforest has the most dense and diverse ecosystem worldwide. A few studies have addressed rodent-borne diseases as potential hazards to humans in this region.

METHODS:

A retrospective survey was conducted using enzyme-linked immunosorbent assay for detecting mammarenavirus and orthohantavirus antibodies in 206 samples collected from rural settlers of the Brazilian Western Amazonian region.

RESULTS:

Six (2.91%) individuals in the age group of 16 to 36 years were found to possess antibodies against mammarenavirus.

CONCLUSION:

Evidence of previous exposure to mammarenavirus in the rural population points to its silent circulation in this region.

Keywords:
Zoonoses; Brazilian Amazonian region; Mammarenavirus; Hantavirus; Rodent-borne disease

Categorical variable	Number of subjects (%)	Seropositivity (%) (95% CI)	X² (p-value)
Age			0.10
<12	62 (30.1)	0 (0.0)
13-17	25 (12.1)	2 (8.0) (2.2-25.0)
18-30	51 (24.8)	3 (5.9) (2.0-15.9)
>31	68 (33.0)	1 (1.5) (0.3-7.9)
Sex			0.44
Women	106 (51.5)	4 (3.8) (1.5-9.3)
Men	100 (48.5)	2(2.0) (0.6-7.0)
Time of residence in the area			0.38
< 5 years	69 (33.5)	2 (2.9) (0.8-10.0)
6 - 15 years	80 (38.8)	1 (1.2) (0.2-6.7)
> 16 years	57 (27.7)	3 (5.3) (1.8-14.4)
House material			0.52
Brick	15 (7.3)	0 (0.0)
Straw	21 (10.2)	0 (0.0)
Wood	170 (82.5)	6 (3.5) (1.6-7.5)
Sewage			0.52
Septic tank	22 (10.7)	0 (0.0)
Open trench	170 (82.5)	6 (3.5) (1.6-7.5)
Other	14 (6.8)	0 (0.0)
Main activity developed on the property			0.94
Agriculture	44 (21.4)	1 (2.3) (0.4-11.8)
Cattle raising	134 (65.0)	4 (3.0) (1.2-7.4)
None	28 (13.6)	1 (3.6) (0.6-17.7)
Pets on the property			0.45
No	17 (8.3)	0 (0.0)
Yes	189 (91.7)	6 (3.2) (1.5-6.8)
Hunting and fishing			0.35
No	70 (34.5)	1 (1.4) (0.3-7.7)
Yes	133 (65.5)	5 (3.8) (1.6-8.5)
Profession			0.57
Farmer	59 (28.6)	1 (1.7) (0.3-9.0)
Housekeeping	35 (17.0)	2 (5.7) (1.6-18.6)
Student	58 (28.2)	2 (3.4) (1.0-11.7)
Education worker	12 (5.8)	1 (8.3) (1.5-35.4)
Other school activities^a	28 (13.6)	0 (0.0)
Other^b	14 (6.8)	0 (0.0)

Sociedade Brasileira de Medicina Tropical - SBMT Sociedade Brasileira de Medicina Tropical - SBMT, Núcleo de Medicina Tropical UnB, Sala 43C 70904-970, E-mails: rsbmt@uftm.edu.br | artes.rsbmt@gmail.com | sbmt@sbmt.org.br , WhatsApp: SBMT (61) 9.9192-6496, WhatsApp: RSBMT (34) 9.9996-5807 - Brasília - DF - Brazil
E-mail: rsbmt@uftm.edu.br

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[1] Corresponding author: Dr. Jorlan Fernandes. e-mail:jorlan@ioc.fiocruz.br