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Identification and Molecular Characterization of Shamonda Virus in an Aborted Goat Fetus in South Africa

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Journal Pathogens
Date 2023 Sep 28
PMID 37764908
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Abstract

Viruses in the genus, family, are associated with encephalitis, birth defects and fatalities in animals, and some are zoonotic. Molecular diagnostic investigations of animals with neurological signs previously identified Shuni virus (SHUV) as the most significant orthobunyavirus in South Africa (SA). To determine if other orthobunyaviruses occur in SA, we screened clinical specimens from animals with neurological signs, abortions, and acute deaths from across SA in 2021 using a small (S) segment Simbu serogroup specific TaqMan real-time reverse transcription polymerase chain reaction (RT-PCR). Positive cases were subjected to Sanger sequencing and phylogenetic analysis to identify specific viruses involved, followed by next-generation sequencing (NGS) and additional PCR assays targeting the medium (M) segment and the large (L) segment. In total, 3/172 (1.7%) animals were PCR positive for Simbu serogroup viruses, including two horses with neurological signs and one aborted goat fetus in 2021. Phylogenetic analyses confirmed that the two horses were infected with SHUV strains with nucleotide pairwise (p-) distances of 98.1% and 97.6% to previously identified strains, while the aborted goat fetus was infected with a virus closely related to Shamonda virus (SHAV) with nucleotide p-distances between 94.7% and 91.8%. Virus isolation was unsuccessful, likely due to low levels of infectious particles. However, phylogenetic analyses of a larger fragment of the S segment obtained through NGS and partial sequences of the M and L segments obtained through RT-PCR and Sanger sequencing confirmed that the virus is likely SHAV with nucleotide p-distances between 96.6% and 97.8%. This is the first detection of SHAV in an aborted animal in SA and suggests that SHAV should be considered in differential diagnosis for abortion in animals in Southern Africa.

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References
1.
Hirashima Y, Kitahara S, Kato T, Shirafuji H, Tanaka S, Yanase T . Congenital Malformations of Calves Infected with Shamonda Virus, Southern Japan. Emerg Infect Dis. 2017; 23(6):993-996. PMC: 5443447. DOI: 10.3201/eid2306.161946. View

2.
Golender N, Brenner J, Valdman M, Khinich Y, Bumbarov V, Panshin A . Malformations Caused by Shuni Virus in Ruminants, Israel, 2014-2015. Emerg Infect Dis. 2015; 21(12):2267-8. PMC: 4672418. DOI: 10.3201/eid2112.150804. View

3.
van Eeden C, Williams J, Gerdes T, van Wilpe E, Viljoen A, Swanepoel R . Shuni virus as cause of neurologic disease in horses. Emerg Infect Dis. 2012; 18(2):318-21. PMC: 3310469. DOI: 10.3201/eid1802.111403. View

4.
Molini U, Capobianco Dondona A, Hilbert R, Monaco F . Antibodies against Schmallenberg virus detected in cattle in the Otjozondjupa region, Namibia. J S Afr Vet Assoc. 2018; 89(0):e1-e2. PMC: 6138096. DOI: 10.4102/jsava.v89i0.1666. View

5.
Motlou T, Williams J, Venter M . Epidemiology of Shuni Virus in Horses in South Africa. Viruses. 2021; 13(5). PMC: 8158722. DOI: 10.3390/v13050937. View