High occurrence of Mycoplasma suis infection in swine herds from non-technified farms in Mossoró, state of Rio Grande do Norte, Northeastern Brazil

Abstract

Mycoplasma suis, the etiological agent of swine hemoplasmosis, has been neglected in swine herds around the world. Swine hemoplasmosis is frequently associated with hemolytic anemia, disgalacty, infertility and immunosuppression, and it results in significant economic losses. This study investigates the occurrence of M. suis in non-technified swine herds in the northeastern region of Brazil using quantitative PCR (qPCR) based on the 16S rRNA gene. Between March and August 2013, blood samples from 147 swine were collected during slaughter in the city of Mossoró, state of Rio Grande do Norte, northeastern Brazil. One hundred and twelve samples (76.19%) were positive for M. suis by qPCR assays. The range of Cqs and quantification (copies of a M. suis-16S rRNA gene fragment/µL) was 20.86–37.89 and 1.64×101–6.64×107, respectively. One can conclude that M. suis infection have high occurrence (76,19%) in non-technified swine-rearing systems in Mossoró in the state of Rio Grande do Norte, Brazil.

Porcine hemothropic mycoplasmas infection associated with productive impact in intensive pig production

“…Quantitative PCR results showed that more than 80% of the positive animals presented PH loads between 10 − 1 and 10 4 copies/μL, corroborating previous studies conducted in Brazil [ 15 , 17 , 18 , 31 ]. PHs tend to establish chronic infections with nonclinical presentations in pigs [ 6 , 35 ].…”

“…Porcine hemoplasmas (PH) have been described in China [ 4 , 11 ], the United States [ 12 ], Brazil [ 13 – 16 , 17 , 18 ], Germany [ 19 , 20 ], France [ 21 ], South Korea [ 10 ], Japan [ 22 , 23 ], Hungary [ 24 ], Switzerland [ 25 ], and Argentina [ 26 ]. Additionally, the first three countries, abovementioned, are amongst the four biggest pork producers in the world [ 27 ].…”

“…Even though PHs have been reported in the intensive [ 18 , 31 ] and extensive [ 15 , 17 ] pig production systems in Brazil, the influence of these agents on productive swine performance has not been assessed. Therefore, this body of work investigated the occurrence of PH and its association with average daily weight gain (ADWG) in finishing pigs from a commercial farm in Brazil.…”

Molecular detection of Mycoplasma suis in extensive pig production systems in the State of Maranhão, northeast Brazil

“…In this sense, Yuan et al (2009) reported the occurrence of M. suis of 86% in pigs and 49% in veterinarians and contact individuals with these animals in China, emphasizing the high occurrence of the agent in question and suggesting a possible zoonotic potential of this hemoplasma species. Interestingly, the high percentage of positivity for M. suis in pigs sampled in the present study (54.7%) was similar to that found in extensive pig farms in the state of Rio Grande do Norte (76.19%), northeastern Brazil (TOLEDO et al, 2016), where climatic and management conditions were similar to those of the present study.…”

“…In recent years, M. suis has been detected in pig farms in China (YUAN et al, 2009), Germany (RITZMANN et al, 2009HOELZLE et al, 2010) and Brazil (GUIMARÃES et al, 2007;TOLEDO et al, 2016). In this sense, Yuan et al (2009) reported the occurrence of M. suis of 86% in pigs and 49% in veterinarians and contact individuals with these animals in China, emphasizing the high occurrence of the agent in question and suggesting a possible zoonotic potential of this hemoplasma species.…”