Document Detail

Anthroponotic enteric parasites in monkeys in public park, China.
Jump to Full Text
MedLine Citation:
PMID:  23017776     Owner:  NLM     Status:  MEDLINE    
Cryptosporidium spp., Giardia duodenalis, and Enterocytozoon bieneusi were detected in 45, 35, and 116 of 411 free-range rhesus monkeys, respectively, in a popular public park in the People's Republic of China. Most genotypes and subtypes detected were anthroponotic, indicating these animals might be reservoirs for human cryptosporidiosis, giardiasis, and microsporidiosis.
Jianbin Ye; Lihua Xiao; Jingbo Ma; Meijin Guo; Lili Liu; Yaoyu Feng
Related Documents :
18407206 - The aromatic hydrocarbon receptor, dioxin action, and endocrine homeostasis.
1176476 - Cast vs. wrought cobalt-chromium surgical implant alloys.
15261556 - Mechanisms of mitoxantrone in multiple sclerosis--what is known?
19608946 - An account of collective actions in public health.
11184656 - Demanding healthcare.
24168316 - A public private partnership to fight against malaria along the chad-cameroon pipeline ...
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Emerging infectious diseases     Volume:  18     ISSN:  1080-6059     ISO Abbreviation:  Emerging Infect. Dis.     Publication Date:  2012 Oct 
Date Detail:
Created Date:  2012-09-28     Completed Date:  2013-02-19     Revised Date:  2013-07-11    
Medline Journal Info:
Nlm Unique ID:  9508155     Medline TA:  Emerg Infect Dis     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1640-3     Citation Subset:  IM    
East China University of Science and Technology, Shanghai, People’s Republic of China.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Cryptosporidiosis / parasitology,  veterinary
Cryptosporidium / classification,  genetics,  isolation & purification*
Disease Reservoirs*
Enterocytozoon / classification,  genetics,  isolation & purification*
Feces / parasitology
Giardia lamblia / classification,  genetics,  isolation & purification*
Giardiasis / parasitology,  veterinary
Macaca mulatta / parasitology*
Microsporidiosis / parasitology,  veterinary

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

Full Text
Journal Information
Journal ID (nlm-ta): Emerg Infect Dis
Journal ID (iso-abbrev): Emerging Infect. Dis
Journal ID (publisher-id): EID
ISSN: 1080-6040
ISSN: 1080-6059
Publisher: Centers for Disease Control and Prevention
Article Information
Download PDF

Print publication date: Month: 10 Year: 2012
Volume: 18 Issue: 10
First Page: 1640 Last Page: 1643
PubMed Id: 23017776
ID: 3471640
Publisher Id: 12-0653
DOI: 10.3201/eid1810.120653

Anthroponotic Enteric Parasites in Monkeys in Public Park, China Alternate Title:Anthroponotic Parasites in Monkeys, China
Jianbin Ye
Lihua Xiao
Jingbo Ma
Meijin Guo
Lili Liu
Yaoyu Feng
East China University of Science and Technology, Shanghai, People’s Republic of China (J. Ye, J. Ma, M. Guo, L. Liu, Y. Feng);
and Centers for Disease Control and Prevention, Atlanta, Georgia, USA (J. Ye, L. Xiao)
Correspondence: Address for correspondence: Yaoyu Feng, State Key Laboratory of Bioreactor Engineering, School of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai 200237, People’s Republic of China; email:

Cryptosporidiosis, giardiasis, and microsporidiosis are enteric diseases in humans and are mainly caused by Cryptosporidium spp., Giardia duodenalis, and Enterocytozoon bieneusi, respectively (13). These protozoan parasites are also commonly found in animals and are considered zoonotic. However, the role of nonhuman primates in the transmission of the diseases remains unclear because few studies have been conducted on the genetic characteristics of the parasites in these animals. In a recent study in Kenya, 5 (2.0%) and 13 (5.5%) of 235 captive baboons had human-pathogenic C. hominis subtypes and E. bieneusi genotypes, respectively. This finding implies that nonhuman primates might be reservoirs for human cryptosporidiosis and microsporidiosis (4). We determined the genotypes and subtypes of Cryptosporidium spp., G. duodenalis, and E. bieneusi in free-range rhesus monkeys in a popular public park to assess the potential for transmission of these parasites from rhesus monkeys to humans.

The Study

In November 2010, we collected 411 fecal specimens from rhesus monkeys (Macaca mulatta) in Qianling Park, Guiyang, People’s Republic of China ( The park, a major tourist attraction of the city, is visited by 10,000–70,000 persons each day. It has the highest number (≈700) of domesticated free-range monkeys in China, which originated from a troop of 20 animals in 1985. Visitors are allowed to bring or buy food to feed the animals, watch them from a short distance, or play with them (Figure, panel A).

We collected fecal droppings at 3 locations with different animal densities. A total of 187 specimens were collected from the Macaque Garden, where animal density was the highest, at ≈400 animals in a small open area between 2 mountains. Another 74 specimens were collected from the Tanquan Spring area, where animal density was the lowest. The remaining 150 specimens were collected from the Hongfu Temple, which had moderate animal density. Twenty-three 100-mL grab samples of high-turbidity water were collected at various points of a small lake near the Macaque Garden and Tanquan Spring, where the rhesus monkeys frequently bathed (Figure).

We detected Cryptosporidium spp., G. duodenalis subtypes, and E. bieneusi genotypes in the fecal specimens and differentiated them by using PCR and sequence analysis of the small subunit rRNA gene (5), triosephosphate isomerase gene (6), and ribosomal internal transcribed spacer (4), respectively. We similarly analyzed water samples after concentrating pathogens by centrifugation at 3,000 × g for 15 min. We subtyped C. hominis and C. parvum by using sequence analysis of the 60-kDa glycoprotein gene (5). We analyzed each specimen at least 2× by using PCR, with the inclusion of positive and negative controls in each run. We used the χ2 test to compare differences in rates of each parasite.

We detected Cryptosporidium spp. in 45 (10.9%) of the 411 fecal specimens, belonging to 3 species: C. hominis (39 specimens), C. parvum (5), and C. felis (1). The rate at Macaque Garden (16.6%) was significantly higher than at Hongfu Temple (6.0%; p = 0.003) and Tanquan Spring (6.8%; p = 0.038) (Table). Among 44 specimens successfully subtyped, 7 subtypes in 5 subtype families were identified: 4 families (Ia, Id, Ie, and If) of C. hominis and 1 family (IIc) of C. parvum (Table). The most common subtypes were IaA13R8 (8 specimens), IdA20 (13), IeA11G3T3 (13), and IIcA5G3a (5).

G. duodenalis was identified in 35 (8.5%) of the 411 fecal specimens. The rates at Macaque Garden (10.2%; p = 0.016) and Hongfu Temple (10.0%; p = 0.018) were significantly higher than at Tanquan Spring (1.4%). All positive specimens except for 1 were successfully genotyped and subtyped and belonged to assemblages A (10) and B (24). All assemblage A isolates belonged to subtype A2 (10 specimens). In assemblage B, 7 subtypes were identified: 1 known subtype in 11 specimens and 6 new subtypes at low frequencies (Table).

E. bieneusi was identified in 116 (28.2%) of the 411 fecal specimens. The occurrence rate at Macaque Garden (40.6%) was significantly higher than at Hongfu Temple (21.3%; p = 0.00016) and Tanquan Spring (10.8%; p = 0.000033). Among the 109 specimens successfully sequenced, 6 genotypes were identified: 4 known genotypes (Peru11 [69 specimens], WL15 [28], EbpC [4], and Type IV [6]) and 2 new genotypes at low frequencies (Table).

Cryptosporidium spp., G. duodenalis, and E. bieneusi were detected in 11 (47.8%), 12 (52.2%), and 13 (56.5%), respectively, of the 23 water samples collected from the lake where the animals bathed. Fewer C. hominis and G. duodenalis subtypes and E. bieneusi genotypes were detected in water samples than in fecal specimens. Most of the common C. hominis (IaA13R8 and IeA11G3T3) and G. duodenalis (B1 and B5) subtypes and all common E. bieneusi genotypes (Peru11, W15, EbpC, and Type IV) in animals were found in water samples (Table). We deposited unique nucleotide sequences obtained in GenBank under accession nos. JX000562–JX000573.


All C.hominis and C. parvum subtypes found in this study are well-known parasites of humans and have rarely been found in animals. The C. hominis subtype families Ia, Id, Ie, and If had been reported in humans and urban wastewater in China (5,79). Although it has not been found in humans in China, the C. parvum IIc subtype family identified in rhesus monkeys in this study is a well-known anthroponotic parasite in developing countries (1).

The G. duodenalis subtypes found in Qianling Park are also major pathogens in humans. The subtype A2 of assemblage A is a common pathogen in humans in most areas studied and is less frequently found in animals than the A1 subtype (2). The dominant B1 subtype found in Qianling Park is also identical to an assemblage B subtype (GenBank accession no. GU564280) previously identified in humans in China (9).

Most E. bieneusi genotypes identified in this study had also been reported in humans. Among the dominant E. bieneusi genotypes, Peru11 had been seen only in humans and baboons (3,4). Although genotypes IV, EbpC, and WL15 have been reported in animals, they are common parasites of humans in many areas (3).

The origin of Cryptosporidium spp., G. duodenalis, and E. bieneusi parasites in the rhesus monkey population is not clear. Because these parasites are common human pathogens, they could have been introduced by humans. However, rhesus monkeys can be natural hosts of these organisms, as supported by recent identification of some of these organisms in newly captive baboons from rural and forested areas (4). Regardless of the initial origin of the parasites, they can be transmitted efficiently among rhesus monkeys, as supported by the higher occurrence of Cryptosporidium spp., G. duodenalis, and E. bieneusi at places with higher animal density.

Our results indicate that rhesus monkeys in close contact with humans are commonly infected with human-pathogenic C. hominis, C. parvum, and G. duodenalis subtypes and E. bieneusi genotypes. Therefore, they can serve as reservoirs of human cryptosporidiosis, giardiasis, and microsporidiosis. Zoonotic transmission of infection from these monkeys can occur directly by close contact of monkeys and humans (Figure, panel A), or indirectly through contamination of drinking water or recreational water (Figure, panel B). Efforts should be made to educate the public about the potential risk for zoonotic transmission of enteric pathogens from rhesus monkeys and to minimize contamination of drinking and recreational water by parasites of rhesus monkey origin.


Suggested citation for this article: Ye J, Xiao L, Ma J, Guo M, Liu L, Feng Y. Anthroponotic enteric parasites in monkeys in public park, China. Emerg Infect Dis [Internet]. 2012 Oct [date cited].

This work was supported in part by the National Natural Science Foundation of China (31110103901, 31229005, 41001316), the National Basic Research Program of China (973 Project) (2011CB200903), Fundamental Research Funds for the Central Universities, and Open Funding Projects of the State Key Laboratory of Veterinary Etiological Biology at the Lanzhou Veterinary Research Institute and State Key Laboratory of Bioreactor Engineering at East China University of Science and Technology.

Mr Ye is a doctoral candidate at the East China University of Science and Technology. His research interest focuses on in the molecular epidemiology of cryptosporidia, giardia, and microsporidia.

1. . XiaoLMolecular epidemiology of cryptosporidiosis: an update.Exp Parasitol. Year: 2010;124:80–910.1016/j.exppara.2009.03.01819358845
2. . FengY, XiaoLZoonotic potential and molecular epidemiology of Giardia species and giardiasis.Clin Microbiol Rev. Year: 2011;24:110–4010.1128/CMR.00033-1021233509
3. . SantínM, FayerRMicrosporidiosis: Enterocytozoon bieneusi in domesticated and wild animals.Res Vet Sci. Year: 2011;90:363–7110.1016/j.rvsc.2010.07.01420699192
4. . LiW, KiuliaNM, MwendaJM, NyachieoA, TaylorMB, ZhangX, et al. Cyclospora papionis, Cryptosporidium hominis, and human-pathogenic Enterocytozoon bieneusi in captive baboons in Kenya.J Clin Microbiol. Year: 2011;49:4326–910.1128/JCM.05051-1121956988
5. . FengY, LiN, DuanL, XiaoLCryptosporidium genotype and subtype distribution in raw wastewater in Shanghai, China: evidence for possible unique Cryptosporidium hominis transmission.J Clin Microbiol. Year: 2009;47:153–710.1128/JCM.01777-0819005143
6. . SulaimanIM, FayerR, BernC, GilmanRH, TroutJM, SchantzPM, et al. Triosephosphate isomerase gene characterization and potential zoonotic transmission of Giardia duodenalis.Emerg Infect Dis. Year: 2003;9:1444–5210.3201/eid0911.03008414718089
7. . FengY, WangL, DuanL, Gomez-PuertaLA, ZhangL, ZhaoX, et al. Extended outbreak of cryptosporidiosis in a pediatric hospital, China.Emerg Infect Dis. Year: 2012;18:312–410.3201/eid1802.11066622305484
8. . PengMM, MatosO, GateiW, DasP, Stantic-PavlinicM, BernC, et al. A comparison of Cryptosporidium subgenotypes from several geographic regions.J Eukaryot Microbiol. Year: 2001;48(Suppl):28S–31S10.1111/j.1550-7408.2001.tb00442.x11906067
9. . WangR, ZhangX, ZhuH, ZhangL, FengY, JianF, et al. Genetic characterizations of Cryptosporidium spp. and Giardia duodenalis in humans in Henan, China.Exp Parasitol. Year: 2011;127:42–510.1016/j.exppara.2010.06.03420599984


[Figure ID: F1]

Potential zoonotic and waterborne pathways of parasites in Qianling Park, Guiyang, China. A) Close contact of rhesus monkeys with humans. B) Potential contamination of recreational water with pathogens from rhesus monkeys.

[TableWrap ID: T1] Table  Anthroponotic enteric parasites in free-range rhesus monkeys (Macaca mulatta) and water samples in Qianling Park, Guiyang, China*
Species, genotype, or subtype GenBank accession no. Fecal specimens positive for organism
Water samples positive for organism, n = 23
Macaque Garden, n = 187 Hongfu Temple, n = 150 Tanquan Spring, n = 74
C. hominis
IaA13R7 EU095261 2 0 0 0
IaA13R8 JX000568† 6 2 0 2
IaA14R7 JX000569† 1 0 1 0
IdA20 EU095265 10 3 0 0
IeA11G3T3 DQ665689 8 3 2 7
IfA16G2 JX000570† 1 0 0 0
Unknown‡ NA 0 0 0 2
C. parvum
IIcA5G3a AY738195 2 1 2 0
C. felis 1 0 0 0
Subtotal (mean %; 95% CI)§ 31/187 (16.6; 10.7–22.4) 9/150 (6.0; 2.1–9.9) 5/74 (6.8; 0.8–12.7) 11/23 (47.8; 19.6–76.1)
Giardia duodenalis
Assemblage A2 U57897 10 0 0 0
Assemblage B
B1 AY368164 3 7 1 8
B2d JX000562† 0 2 0 0
B3d JX000563† 0 1 0 0
B4d JX000564† 2 0 0 0
B5d JX000565† 2 3 0 3
B6d JX000566† 2 0 0 0
B7d JX000567† 0 1 0 0
Unknown‡ NA 0 1 0 1
Subtotal (mean %; 95% CI)§ 19/187 (10.2; 5.6–14.7) 15/150 (10.0; 4.9–15.1) 1/74 (1.4; 0–4.0) 12/23 (52.2; 22.7–81.7)
Enterocytozoon bieneusi
Peru11 AY371286 46 21 2 4
WL15 AY237223 15 9 4 5
EbpC AY371279 4 0 0 1
Type IV AY371277 6 0 0 2
LW1d JX000571† 0 0 0 1
Macaque1¶ JX000572† 0 0 1 0
Macaque2¶ JX00057† 1 0 0 0
Unknown‡ NA 4 2 1 0
Subtotal (mean %; 95% CI)§ 76/187 (40.6; 31.5–49.8) 32/150 (21.3; 13.9–28.7) 8/74 (10.8; 3.3–18.3) 13/23 (56.5; 25.8–87.2)

*Values are number of positive samples unless otherwise indicated. NA, not applicable.
†From this study.
‡PCR positive but sequence unavailable.
§No. positive /no. tested (% positive; 95% CI).
¶New subtypes or genotypes identified during this study.

Article Categories:
  • Dispatch
Article Categories:
  • Dispatch

Keywords: Keywords: Cryptosporidium, Giardia, Enterocytozoon bieneusi, rhesus monkey, baboon, zoonosis, anthroponotic, protozoa, parasites, enteric.

Previous Document:  Expression profile of toll-like receptor 2 mRNA in selected tissues of shark (Chiloscyllium sp.).
Next Document:  Ischiofemoral impingement: Hip pain of infrequent cause.