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Table 2 Infection of CPV-2 in dogs in mainland China

From: A systematic literature review and meta-analysis of characterization of canine parvoviruses 2 prevalent in mainland China

  No. studies No. positive No. test % (95% CI) Chi2 P I2 (%)
Region
 Northeast China 6 6094 8725 63% (52–74) 465.1 0 99
 North China 9 1033 3230 43% (25–61) 1027.7 0 99
 Northwest China 5 8132 26,786 29% (19–39) 1256.3 0 100
 East China 8 3040 19,155 18% (13–23) 641.6 0 99
 Central China 5 3357 29,768 38% (24–51) 2521.2 0 100
 Southwest China 4 2256 4298 48% (10–86) 2423.1 0 100
Age
 Under 6 months of age 25 14,659 30,657 68% (52–85) 33,254.4 0 100
 6 months of age or above 25 5372 28,386 20% (13–26) 6666.9 0 100
Immunization status
 Yes 24 5123 20,346 20% (15–26) 3172.5 0 99
 No 24 14,434 20,679 68% (62–75) 3152.9 0 99
Gender
 Male 13 5235 20,647 45% (30–61) 6961.5 0 100
 Female 13 4194 18,323 38% (25–50) 4175.6 0 100
Breed
 Purebred 15 9899 16,954 66% (50–82) 10,310.2 0 100
 Mutt 15 4262 14,186 24% (16–33) 2682.9 0 99
Published time
 Before 2016 25 22,915 104,615 35% (27–43) 24,380.0 0 100
 2016 or later 14 4549 32,867 40% (30–49) 3432.4 0 100
Season
 Spring 20 4684 20,887 34% (27–41) 3357.8 0 99
 Summer 18 2522 19,769 15% (11–18) 1151.1 0 98
 August 18 3382 18,894 23% (18–28) 1642.8 0 99
 Winter 18 3839 18,667 24% (18–30) 2413.3 0 99
Diagnostic methods
 Antigen Rapid CPV Ag Test kit 25 21,344 63,939 43% (34–52) 18,492.7 0 100
 PCR 9 2119 23,116 39% (21–53) 1772.5 0 100
 Unknown 5 4001 50,789 15% (10–20) 257.3 0 98
  1. The corresponding data related to the prevalence of CPV-2 infection in dogs were analyzed, including administrative region, age, immunization status, gender, breed, sampling season and diagnostic methods. Among these risk factors, the occurrence of CPV-2 infection was significantly associated with age, breed, sampling season and immunization status, but not with gender and diagnostic methods in dogs. Northeast China: Heilongjiang, Jilin, Liaoning; Northern China: Inner Mongolia, Shanxi, Hebei, Beijing, Tianjin; Northwest China: Xinjiang, Qinghai, Gansu, Ningxia, Shaanxi; Eastern China: Shandong, Anhui, Jiangxi, Jiangsu, Zhejiang, Shanghai, Fujian; Southern China: Guangxi, Guangdong, Shenzhen, Hainan, Macao, Hong Kong; Central China: Henan, Hunan, Hubei; Southwest China: Tibet, Yunnan, Guizhou, Sichuan, Chongqing. CI, confidence interval; Chi2, chi-square; P, P value
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