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fd079a94dc
feat: Add BPV poster
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2025-01-26 18:22:33 -06:00
b207026cee
feat: Add NAAB/Medgene sponsored talk 2025-01-26 18:17:29 -06:00
c2b05d8f48
feat: Add YAVSAP Phi-Zeta day presentation 2025-01-26 18:04:48 -06:00
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---
title: "Genetic analysis of bovine papillomas"
date: 2024-09-19
categories:
- poster
people:
- Thomas A. Christensen II
- Rachel Palinski
- Bob Gentry
journal:
"National Association of Animal Breeders Technical Conference Student Poster
session"
location: "Middleton, Wisconsin"
---
Bovine papillomavirus (BPV) is a major cause of reproductive failure in cattle.
In bulls, penile papillomas caused by BPV may cause reluctance to breed, and is
always a cause to fail an animal on a breeding soundness exam. Historically, it
has been thought that BPV was transmitted via direct contact and could be
controlled by managing clinically presenting animals in the herd, but more
recent evidence suggests alternative modes of transmission. BPV has been found
repeatably in clinically healthy animals, and in non-cutaneous secretions
including milk, blood, urine and semen. Currently, no commercially available BPV
vaccine uses isolated viral particles and naturally occurring virus does not
produce cross-protective immunity. In order to develop a proper vaccine for
penile papillomas further studies are required to understand the epidemiology of
BPV in herds. While vulvar, cutaneous, and mammary papillomas have been
genotyped in recent years, this information is not available for penile
papillomas. In this study there were 31 submissions, collected from 7 states,
NE, KS, NY, TX, AL, MO and SD (14 different cattle operations) Samples were
collected between August of 2022 and April 2024. Twenty-two submissions were
penile papillomas and with pooling of samples represented over 50 penile
papillomas. Samples were metagenomically sequenced at the Kansas State
Veterinary Diagnostic Lab, and the genotype of each sample was determined using
the phylogenetic analysis. The clade of each sample was determined by aligning
consensus sequences of the L1 gene (used for both for phylogeny and as a vaccine
target) using MAFFT and a maximum-likelihood phylogeny generated in Mega X.
Analysis found that all penile papilloma submissions were composed of BPV type
2, with one sample showing co-infection with BPV type 1. Conversely, cutaneous
and teat papillomas had BPV genotypes that were more variable with genotypes of
1,2,7,12,14,29 and 40. These results indicate that BPV type 2 and type 1 provide
a unified target for bovine penile papilloma vaccine development.

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---
title:
"Got Warts? Bovine Papillomavirus Pathogenesis, Transmission, and Vaccination"
date: 2024-09-19
featured: false
categories:
- presentation
people:
- Bob Gentry
- Thomas A. Christensen II
journal:
"National Association of Animal Breeders Technical Conference Sponsor session"
location: "Middleton, Wisconsin"
---

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---
title: "YAVSAP: versatile viral quasispecies analysis for veterinary samples"
date: 2024-03-05
featured: false
categories:
- presentation
people:
- Thomas A. Christensen II
- Steven Stancic
- Andrea Lu
- Dana Mitzel
- William Wilson
- Rachel Palinski
journal: "Phi Zeta Research Day"
location: "Manhattan, Kansas"
tags:
- virus
- quasispecies
- next-generation sequencing
- pipeline
awards:
- "2nd Place Large Animal Applied Research Presentation"
link: "/academia/yavsap/yavsap.pdf"
---
Viral populations within an infected host are composed of viral particles with a
spectrum of genetic mutations rather than a unified genome. This phenomenon is
referred to as viral "quasispecies," and has been useful for the understanding
of viral transmission and early detection of new viral variants. Next generation
sequencing (NGS) has enabled the study of these quasispecies for many viral
species, notably Influenza A and B, Human Immunodeficiency Virus (HIV), Foot and
Mouth Disease Virus (FMDV), and Severe Acute Respiratory Syndrome Coronavirus 2
(SARS CoV2), and established protocols and computer analysis tools have been
developed for these species. Some of the most important viruses, such as
emerging and exotic disease agents, however, do not have replicatable protocols
or software tools capable of producing valid output from their sequence data.
Here, we present Yet Another Viral Subspecies Analysis Pipeline (YAVSAP). YAVSAP
is a fully automated bioinformatic pipeline built from the ground up to identify
and analyze viral quasispecies of any arbitrary virus in human and veterinary
samples. YAVSAP provides reference-based genome mapping of both long- and
short-read sequencing reads to any reference genome that the user chooses,
identifies subconsensus variants and haplotypes, and assesses the phylogenies of
all viral sequences found within a sample. YAVSAP is written in Nextflow and
conforms to the nf-core initiative's standards, which allows it to run on
low-end computers, high performance computing (HPC) clusters, or anything in
between with zero configuration. YAVSAP has been tested on viruses of interest
to veterinary medicine and public health, including Japanese Encephalitis Virus
(JEV), Influenza D Virus (IDV), Bovine Coronavirus (BCoV), SARS CoV2, and Rift
Valley Fever Virus (RVFV), and can correctly identify consensus genomes and
quasispecies within samples containing each of these viruses. This tool provides
a means for biologists with little bioinformatic experience to analyze deep
sequence data while correcting for many of the pitfalls associated with previous
and current analysis platforms. YAVSAP is open source software and is publicly
available at https://github.com/ksumngs/yavsap.

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