13.07.2015 Views

vol21no7_pdf-version

vol21no7_pdf-version

vol21no7_pdf-version

SHOW MORE
SHOW LESS

You also want an ePaper? Increase the reach of your titles

YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.

Bufavirus in Wild Shrews and Nonhuman PrimatesTable. Sample information and nested PCR screening results for bufavirus, ZambiaAnimal,* species (common name) Location Year PCR positive/totalPrimatePapio cynocephalus (yellow baboon) Mfuwe 2009 2/50P. ursinus (Chacma baboon) Livingstone 2010–2011 1/50Chlorocebus pygerythrus (vervet monkey) Mfuwe 2009 0/50Livingstone 2010–2011 0/39ShrewCrocidura hirta (lesser red musk shrew) Livingstone 2011 0/2Mpulungu 2012 5/22Namwala 2012 0/2Mazabuka 2013 0/4Solwezi 2013 0/2C. luna (moonshine shrew) Mpulungu 2012 0/1Solwezi 2013 12/16RodentMastomys natalensis (African soft-furred rat) Livingstone 2011 0/35Mpulungu 2012 0/28Namwala 2012 0/29Mazabuka 2013 0/57Solwezi 2013 0/56Other species† Livingstone 2011 0/9Mpulungu 2012 0/20Namwala 2012 0/34Mazabuka 2013 0/16Solwezi 2013 0/14Total 20/536*For this analysis, the template DNA was prepared from the spleen tissues of the animals indicated.†Other species from the genera.Aethomys, Arvicanthis, Cricetomys, Gerbilliscus, Grammomys, Graphiurus, Lemniscomys, Mus, Paraxerus, Pelomys,Rattus, Saccostomus, and Steatomys.5′-GTTGGAGGTACACATGGATGAGGA-3′).We detected the MpBuV genome in 5 (22%) of the 23samples from the intestinal contents of individual shrewscaptured in Mpulungu. We then tested for the presence ofMpBuV in the lung, spleen, liver, and kidney tissues of theshrews that were PCR positive for MpBuV by screening ofintestinal contents. The MpBuV genome was detected in 5spleen and 4 liver samples from the 5 shrews.This discovery of MpBuV urged us to further investigateBuVs and related parvoviruses in wildlife. We designeddegenerate primers for nested PCR screening onthe basis of a multiple sequence alignment of the NS1 genefrom human BuV, WUHARV parvovirus and MpBuV asfollows: BuV-F1 (position 190–215 in MpBuV genome,5′-TCAAWRTMACCTGGAAAGACTACAGA-3′) andBuV-R1 (position 1503 1534, 5′-TCATTGGTTGTCAT-KAYWACTGGAGTTGGTTC-3′) for the first PCR round,and BuV-F2 (position 980–1006, containing an equimolarmixture of 5′-AGAAAAATGGATGCTCCAAGATCCA-GA-3′ and 5′-AGAAAAATGGATGCTTGGTGAWCCW-GA-3′) and BuV-R2 (position 1444 1465, 5′-ATTGCTTG-GCCACTCATGATKG-3′) for the second PCR round.PCRs were performed by using Tks Gflex DNA polymeraseand the annealing temperatures were set at 50°C and 55°Cfor the first and second PCR round, respectively.We screened 536 spleen tissue specimens from wildlife.The specimens from 3 nonhuman primate species,2 shrew species, and 14 rodent genera from 6 locationsin Zambia were used for different research projects, asreported previously (13,14). All our sampling activitieswere conducted with the permission of the Zambia WildlifeAuthority (Act No. 12 of 1998). We chose spleen tissuefor nested PCR screening because specimens of intestinalcontents were unavailable for almost all of the animals wesampled. As we described, MpBuV was detected in spleensamples in addition to samples of intestinal contents fromthe same animals.Nested PCR screening for BuVs detected MpBuVfrom 5 shrews in Mpulungu; these were the same animalsthat were PCR-positive for MpBuV by using a specificprimer set targeting MpBuV. Nested PCR was also positivein 3 primates and 12 shrews (Table). The PCR ampliconswith expected size (≈480 bp) were subjected to directsequence analysis. A Bayesian phylogenetic analysis wasperformed as described by using the partial nucleotide sequencesobtained for the NS1 gene with the exception ofthe primer sequences (434–440 bp) and the correspondinggenome regions of known protoparvoviruses and amdoviruses.The BuVs detected clustered with human BuVs andthe WUHARV parvovirus and are distinguishable fromother protoparvoviruses (Figure). The BuVs detected canbe divided into MpBuV and 3 other strains; we have tentativelynamed these Solwezi BuV, Mfuwe BuV, and LivingstoneBuV (Figure). Solwezi BuV, which shares 79%nt sequence identity with MpBuV, was identified in 12shrews (Crocidura luna) in Solwezi. Mfuwe BuV and LivingstoneBuV were identified in 2 yellow baboons (Papiocynocephalus) in Mfuwe and a chacma baboon (P. ursinus)Emerging Infectious Diseases • www.cdc.gov/eid • Vol. 21, No. 7, July 2015 1231

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!