Occurrence of serological reactions for serogroup Sejroe (CTG and Prajtino) in female buffalo in the state of Pernambuco, Brazil

Abstract

The objective of this study was to evaluate the occurrence of anti-Leptospira spp. antibodies in female buffalo in the state of Pernambuco. A total of 123 female buffalo blood samples were collected from five properties distributed in the state of Pernambuco. The microscopic agglutination test was used to study anti-Leptospira spp. antibodies. The occurrence of anti-Leptospira spp. antibodies was 28.5% (35/123; CI 20.7–37.3%) and on different properties, the occurrence ranged from 28.6% to 80.0%, with 100% of the properties showing animals with positive results. The serovars of the serogroup Sejroe with a higher incidence were Hardjoprajtino (CTG strain, 49.1%) and Hardjo (Prajtino genotype, 43.2%), followed by serogroup Grippotyphosa with the Grippotyphosa serovar (3.9%), serogroup Pomona with the Pomona serovar (1.9%), and the Icterohaemorrhagiae serovar Copenhageni (1.9%). This was the first record of the occurrence of anti-Lepstospira spp. antibodies in female buffalo in the state of Pernambuco. Control measures are necessary to prevent health and economic losses, given that the agent involved affects animal reproduction, triggering drops in conception rates or even clinical cases of abortion.

Serological frequency of Leptospira spp. in buffaloes (Bubalus bubalis) in Paraná state, Brazil

“…The frequency of leptospirosis in buffaloes in the state of Paraná found in the present study was 77.17% (213/276), a high result close to the 80% (164/205) found by Viana et al (2009) in Pará and 70.58% (216/306) found by Carvalho et al (2015) in Maranhão. The frequency found was higher than those found in other studies conducted in different states of Brazil, such as 28.5% (35/123) in Pernambuco (Oliveira et al 2018), 27.9% (38/136) in Paraíba (Pimenta et al 2019), 67.7% (86/127) in buffaloes in Pará (Silva et al 2009) or 56.25% (18/32) in Minas Gerais (Mendes et al 2018). It is also important to consider that frequency of leptospirosis can be affected by the number of serovars used in MAT testing (Adesiyun et al 2009).…”

“…Hardjo serovar was the third most frequent serovar between seropositive buffaloes in the state of Paraná, with 23.00% (49/213) seroreagent animals for this serovar. Some studies consider this the most frequent serovar found in bubaline herds in Brazil, with a prevalence of 43.4% (165/381) and 33.6% (51/152) in São Paulo (Langoni et al 1999, Favero et al 2002, 23,25% (20/86) and 76,44% (2901/3795) in Pará (Silva et al 2009, Dias et al 2014 in Pernambuco (Oliveira et al 2018), and 20.4% (18/88) in Marajó Island (Oliveira et al 2013). Thus, the prevalence of Hardjo serovar in bubaline from the state of Paraná can be considered lower than in other states and regions of Brazil.…”

“…In these animals, the disease develops in the chronic and subclinical form, in which the animals persist, transmitting the disease through urine and reproductive tract secretions (Lilenbaum & Martins 2014). The infection of buffaloes may be associated with their proximity and high interaction with cattle, making them also reservoirs of this serovar (Assenga et al 2015, Oliveira et al 2018, Guedes et al 2020b).…”

Detecção de anticorpo anti-Brucella sp. e anti-Leptospira spp. em búfalos (Bubalus bubalis) abatidos em matadouro na cidade de Belém, Pará

“…em búfalos assintomáticos na região amazônica foram pouco relatados, como o de Viana et al (2009) que encontraram uma alta frequência com 80% (164/205) dos animais reagentes. Em outros estados, como Paraíba, Pernambuco e Maranhão foram relatados bubalinos soros reagentes com frequências que variaram de 27,9% a 70,58% (Brasil et al, 2015;Carvalho et al, 2015, Oliveira et al, 2018.…”

Cenário Brasileiro da leptospirose bubalina

“…No estado do Maranhão, município de São Mateus, foram examinadas 306 amostras de soros sanguíneos, 70,5% foram sororeagentes, sendo a L. interrogans sorogrupo Pomona, o de maior ocorrência (CARVALHO et al, 2015). No estado de Pernambuco, em cinco rebanhos bubalinos, a soroprevalência encontrada variou entre 28,6% e 80,0%, com frequência maior para o sorogrupo Sejroe (Hardjoprajitno), seguidos pelos sorogrupos Grippotyphosa, Pomona e Icterohaemorrhagiae (DE OLIVEIRA et al, 2018). Em outras regiões do Nordeste, o sorogrupo Pomona tem sido relatado como sendo altamente prevalente em búfalos (PIMENTA et al 2019).…”