EXHIBIT 2

POWER OF ATTORNEY

KNOW ALL BY THESE PRESENTS, that the undersigned hereby constitutes and appoints David Speights and Michael Duncan, signing singly, the undersigned’s true and lawful attorney-in-fact to: (i) execute for and on behalf of the undersigned, in the undersigned’s capacity as a beneficial owner of shares of common stock of Zila, Inc., a Delaware corporation (the “Company”), any Schedule 13D or Schedule 13G, and any amendments, supplements or exhibits thereto (including any joint filing agreements) required to be filed by the undersigned under Section 13 of the Securities Exchange Act of 1934, as amended, and the rules and regulations promulgated thereunder (the “Exchange Act”); (ii) do and perform any and all acts for and on behalf of the undersigned which may be necessary or desirable to complete and execute any such Schedule 13D or Schedule 13G and timely file such forms with the United States Securities and Exchange Commission; and (iii) take any other action of any type whatsoever in connection with the foregoing which, in the opinion of such attorney-in-fact, may be of benefit to, in the best interest of, or legally required by, the undersigned, it being understood that the documents executed by such attorney-in-fact on behalf of the undersigned pursuant to this Power of Attorney shall be in such form and shall contain such terms and conditions as such attorney-in-fact may approve in such attorney-in-fact’s discretion.

The undersigned hereby grants to each such attorney-in-fact full power and authority to do and perform any and every act and thing whatsoever requisite, necessary, or proper to be done in the exercise of any of the rights and powers herein granted, as fully to all intents and purposes as the undersigned might or could do if personally present, with full power of substitution or revocation, hereby ratifying and confirming all that such attorney-in-fact’s substitute or substitutes, shall lawfully do or cause to be done by virtue of this power of attorney and the rights and powers herein granted. The undersigned acknowledges that the foregoing attorneys-in-fact, in serving in such capacity at the request of the undersigned, are not assuming any of the undersigned’s responsibilities to comply with Section 13 of the Exchange Act.

This Power of Attorney shall remain in full force and effect until the undersigned is no longer required to file reports or schedules under Section 13 of the Exchange Act with respect to the undersigned’s holdings of and transactions in securities issued by the Company, unless earlier revoked by the undersigned in a signed writing delivered to the foregoing attorneys-in-fact.

IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to be executed as of this 6th day of August 2009.

	DILLFORD COMPANY S.A.

	By:	/s/ A. C. Ortiz
	Name:	A. C. Ortiz
	Title:	Director

	By:	/s/ J. R. Manso
	Name:	J. R. Manso
	Title:	Director

ZILA INC SC 13D