Toxoplasma gondii can infect all mammals, including humans, and can cause serious public health problems and economic losses. Pork is considered an important source of infection for humans, and seroepidemiological surveys are used to assess the level of infection in pig herds. To understand the current seroprevalence and potential risk factors of T. gondii in pigs in Chongqing, a total of 1221 serum samples collected from seven slaughterhouses in five districts from 2015 to 2019 were analyzed for antibodies against the protozoan by enzyme-linked immunosorbent assay. The overall seropositive rate for T. gondii antibodies in Chongqing was 11.1%. The rate varied among the different districts (9.8–15.2%), slaughterhouses (8.0–18.4%), seasons (8.1–14.6%), and years (6.3–14.7%). These results suggest that the season and year were potential risk factors for T. gondii infection in pigs of Chongqing. The study provides prevalence and risk factor data that may help manage livestock and human infections in downstream areas. The Clinical Trial Registration number was SV-20150605-01.
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References
1.
Alvarado-EsquivelC, Romero-SalasD, García-VázquezZ, Crivelli-DiazM, et al.Seroprevalence and correlates of Toxoplasma gondii infection in domestic pigs in Veracruz State, Mexico. Trop Anim Health Prod, 2014; 46:705–709.
2.
BignaJJ, TochieJN, TounougaDN, BekoloAO, et al.Global, regional, and country seroprevalence of Toxoplasma gondii in pregnant women: A systematic review, modelling and meta-analysis. Sci Rep, 2020; 10:12102.
3.
CaiZC, LiFH, HuP, GuanWY, et al.Seroprevalence and analysis of Toxoplasma gondii infection in partial scale pig farms in suburban areas of Beijing. Heilongjiang Anim Sci Vet Med, 2017; 8:103–104 (in Chinese).
4.
ChangQC, ZhengX, QiuJH, WangCR, et al.Seroprevalence of Toxoplasma gondii infection in fattening pigs in Northeast China. J Parasitol, 2013; 99:544–545.
5.
DjokicV, FabletC, BlagaR, RoseN, et al.Factors associated with Toxoplasma gondii infection in confined farrow-to-finish pig herds in western France: An exploratory study in 60 herds. Parasit Vectors, 2016; 9:466.
6.
DongH, SuR, LuY, WangM, et al.Prevalence, risk factors, and genotypes of Toxoplasma gondii in food animals and humans (2000–2017) from China. Front Microbiol, 2018; 9:2108.
7.
DubeyJP. Toxoplasmosis of Animals and Humans, 2nd ed. Boca Raton Florida: CRC Press,, 2010:1–313.
8.
DubeyJP, Cerqueira-CezarCK, MurataF, KwokO, et al.All about Toxoplasma gondii infections in pigs: 2009–2020. Vet Parasitol, 2020; 288:109185.
9.
DubeyJP, VelmuruganGV, Alvarado-EsquivelC, Alvarado-EsquivelD, et al.Isolation of Toxoplasma gondii from animals in Durango, Mexico. J Parasitol, 2009; 95:319–322.
10.
GuDH, LiHL. Serological survey of swine toxoplasmosis. Shandong Anim Sci Vet Med, 2014; 7:53–54 (in Chinese).
11.
HouZF, SuSJ, LiuDD, WangLL, et al.Prevalence, risk factors and genetic characterization of Toxoplasma gondii in sick pigs and stray cats in Jiangsu Province, eastern China. Infect Genet Evol, 2018; 60:17–25.
12.
HuaLZ, WeiDB, WangG, XiongQY, et al.Serological investigation of swine Toxoplasma disease in North and northeast China. Chin J Prev Vet Med, 2016; 38:124–127.
13.
HuangCQ, LinYY, DaiAL, LiX, et al.Seroprevalence of Toxoplasma gondii infection in breeding sows in Western Fujian Province, China. Trop Anim Health Prod, 2010; 42:115–118.
14.
JacksonMH, HutchisonWM. The prevalence and source of Toxoplasma infection in the environment. Adv Parasitol, 1989; 28:55.
15.
LiQ, QinSY, LiS, PengP, et al.First report on Toxoplasma gondii seroprevalence in free-ranging pigs in Northeastern China. Acta Parasitol, 2019; 64:295–299.
16.
LiYN, NieX, PengQY, MuXQ, et al.Seroprevalence and genotype of Toxoplasma gondii in pigs, dogs and cats from Guizhou province, Southwest China. Parasit Vectors, 2015; 8:214.
17.
LiuL, WangP, WangJ, ShayilanK, et al.Antibody monitoring and analysis of Toxoplasma gondii in partial scale pig farms of Xinjiang. Prog Vet Med, 2016; 37:130–132 (in Chinese).
PipiaAP, VarcasiaA, DessiG, PanzalisR, et al.Seroepidemiological and biomolecular survey on Toxoplasma gondii infection on organic pig farms. Parasitol Res, 2018; 117:1637–1641.
20.
ShaoXD, YuanL, ZhaiK, QianWF, et al.Seroprevalence and PCR detection of Toxoplasma gondii in pigs in Luoyang. Heilongjiang Anim Sci Vet Med, 2014; 16:75–77 (in Chinese).
21.
ShuFF, WuDY, ZhouZY, ZhouZY, et al. Seroprevalence of Toxoplasma gondii Infection in Slaughter Pigs in Sichuan, China. J Anim Vet Adv, 2011; 10:1638–1639.
22.
StelzerS, BassoW, BenavidesSJ, Ortega-MoraLM, et al.Toxoplasma gondii infection and toxoplasmosis in farm animals: Risk factors and economic impact. Food Waterborne Parasitol, 2019; 15:e37.
23.
SuR, JiangN, LuY, JianF, et al.Low prevalence of viable Toxoplasma gondii in swine from slaughter houses in the central of China. Parasitol Int, 2020; 76:102090.
24.
TanQ, LiY, Nie k, ZengZ, et al.Epidemiological survey of Toxoplasma gondii in Chongqing. Prog Anim Med, 2008; 29(7): 109–110 (in Chinese).
25.
TaoQ, WangZ, FengH, FangR, et al.Seroprevalence and risk factors for Toxoplasma gondii infection on pig farms in central China. J Parasitol, 2011; 97:262–264.
26.
WangH, WangT, LuoQ, HuoX, et al.Prevalence and genotypes of Toxoplasma gondii in pork from retail meat stores in Eastern China. Int J Food Microbiol, 2012; 157:393–397.
27.
WangYG, GuiBZ, LiRC, WangGP, et al.Seroprevalence and risk factors of Toxoplasma gondii infection in growth stages of pigs in Hunan Province, subtropical China. Vector Borne Zoonotic Dis, 2019; 19:945–949.
28.
WuD, LvR, SunX, ShuF, et al.Seroprevalence of Toxoplasma gondii antibodies from slaughter pigs in Chongqing, China. Trop Anim Health Prod, 2012a; 44:685–687.
29.
WuF, WangYL, YangZ, LiXL, et al.Seroprevalence and risk factors of Toxoplasma gondii in slaughter pigs in Shaanxi Province, Northwestern China. Vector Borne Zoonotic Dis, 2017; 17:517–519.
30.
WuSM, CirenD, HuangSY, XuMJ, et al.First report of Toxoplasma gondii prevalence in Tibetan pigs in Tibet, China. Vector Borne Zoonotic Dis, 2012b; 12:654–656.
31.
XuB, ZhangXL, DongCX, FengC, et al.Epidemiological investigation of swine toxoplasmamosis in Chongqing. Prog Vet Med, 2013a; 34:37–40 (in Chinese).
32.
XuB, ZhangXL, ZengZ, FengC, et al.Serological investigation and analysis of porcine toxoplasmosis in Chongqing. Chinese Vet Sci, 2013b; 043:98–102 (in Chinese).
33.
YuHJ, ZhangZ, LiuZ, QuDF, et al.Seroprevalence of Toxoplasma gondii infection in pigs, in Zhejiang Province, China. J Parasitol, 2011; 97:748–749.
34.
ZhangY, GongH, MiR, HuangY, et al. Seroprevalence of Toxoplasma gondii infection in slaughter pigs in Shanghai, China. Parasitol Int, 2020; 76:102094.
35.
ZhangY, MiR, HuangY, XiaL, et al.Molecular detection and genetic characterization of Toxoplasma gondii in pork in Shanghai, China. Food Control, 2019; 99:57–63.
36.
ZhouDH, LiangR, YinCC, ZhaoFR, et al.Seroprevalence of Toxoplasma gondii in pigs from southern China. J Parasitol, 2010; 96:673–674.
37.
ZhouP, ChenZ, LiHL, ZhengH, et al.Toxoplasma gondii infection in humans in China. Parasit. Vectors, 2011; 4:165.
