The inspectors of the bureau of animal industry of the United States shall have the right to inspect, quarantine and condemn animals infected with any communicable disease, or suspected to be so infected, or that have been exposed to any such disease, and for these purposes are hereby authorized and empowered to enter upon any ground or premises. Such inspectors shall have power and authority to require sheriffs, constables or peace officers to assist them in the discharge of their duties in carrying out the provisions of the acts of Congress, approved May twenty-ninth, eighteen hundred and eighty-four, establishing the bureau of animal industry, and all acts amendatory thereof, and shall have the same powers and protection as peace officers while engaged in the discharge of their duties.