30.12.2013 Views

credits bmbl December 7 '06.doc - Central Michigan University

credits bmbl December 7 '06.doc - Central Michigan University

credits bmbl December 7 '06.doc - Central Michigan University

SHOW MORE
SHOW LESS

Create successful ePaper yourself

Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.

Appendix D<br />

isolated from stillborn piglets from a single outbreak of reproductive disease in a<br />

commercial swine operation in New South Wales, Australia in 1997.<br />

Occupational Infections<br />

There was serological evidence of MenV infection in two people that had close<br />

contact with infected pigs on the affected premises. They demonstrated clinical signs<br />

similar to those seen with influenza such as chills, fever, drenching sweats, headache and<br />

rash. Both workers recovered fully from their illness.<br />

LABORATORY SAFETY<br />

Laboratory practices for MenV are principally designed to prevent transmission to<br />

susceptible livestock, but also to protect workers. The greatest risk of working with<br />

MenV is the escape of the organism into susceptible animal populations, which would<br />

necessitate USDA emergency procedures to contain and eradicate the disease.<br />

Containment Recommendations<br />

MenV is considered cause of a foreign animal disease in the United States and is a<br />

human pathogen. Due to the severe economic consequences of disease presence in the<br />

United States, this organism should only be handled in vitro in a BSL-3 laboratory with<br />

enhancements as required by the USDA and in vivo in a USDA-approved ABSL-3<br />

animal facility with enhancements.<br />

SPECIAL ISSUES<br />

The importation, possession, or use of this agent is prohibited or restricted by law<br />

or by USDA regulations or administrative policies. A USDA/APHIS import or interstate<br />

movement permit is required to obtain this agent or any livestock or poultry product, such<br />

as blood, serum, or other tissues containing the agent.<br />

Newcastle Disease (ND) Virus<br />

ND is one of the most serious infectious diseases of poultry worldwide. It is<br />

primarily a respiratory disease, but nervous and enteric forms occur. All bird species are<br />

probably susceptible to infection with ND virus (NDV). The severity of the disease<br />

caused by any given NDV strain can vary from an unapparent infection to 100%<br />

mortality. The chicken is the most susceptible species. The bio-containment requirements<br />

for working with a particular strain are based on the virulence of the virus as determined<br />

by chicken inoculation and more recently by determination of amino acid sequence of the<br />

fusion protein cleavage site (as defined by the World Organization for Animal Health). 35<br />

The virus is shed in respiratory secretions and in feces. Natural transmission among birds<br />

occurs by aerosol inhalation or by consumption of contaminated feed or water. 36,37<br />

386

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

Saved successfully!

Ooh no, something went wrong!