the effects of such costs, adjusted operating income achieved a margin of 18%, as compared to 21% on the same basis for the third quarter of fiscal 2018.
GAAP net earnings for the third quarter of fiscal 2019 totaled $5.1 million, or $0.12 per diluted share, down 26% and 25%, respectively. On an adjusted basis(non-GAAP), earnings were $7.0 million, or $0.16 per diluted share, down 10% and 11%, respectively. Adjusted basis excludes the effects of costs of acquisition activities, restructuring activities and selected legal proceedings.
Jack Kenny, Chief Executive Officer, commented, “While we were anticipating a challenging third quarter, our overall sales performance came in at the lower end of our expectations. The Life Science segment was flat in the quarter, which was below our expectations. The Diagnostics segment, which had a 9% revenue decline, was in line with our expectations. Our acquisition of the GenePOC business and the revogene™ molecular diagnostics platform is intended to directly address competitive pressures and trends in the molecular portion of our Diagnostics product portfolio. We are optimistic that our integration activities are on track, and early customer feed-back for the revogene™ molecular diagnostics platform has been positive. Although we areearly-on in the process, we are actively converting customers from our alethia™ system to the revogene™ system, and resultsto-date are ahead of expectations. Our development efforts on our Diagnostics instrument platforms, revogene™, Curian™ and PediaStat™, are making significant progress, and over the next12-18 months, we expect to submit to the FDA multiple 510k applications to help us drive future growth. For our Life Science segment, despite the relatively flat revenue performance during the quarter and the first nine months, customer order activity in July signals that our fourth quarter will yield positive revenue growth, with strong contributions from China. Our new lyophilization-ready qPCR andRT-qPCR mixes are showing meaningful revenue contributions as customers recognize the advantages of room-temperature shipping and storage and extended shelf life. We continue to refine and optimize our organizational structure for both business segments to ensure customer focus and cost efficiency. We effectively managed our expenses without compromising future growth initiatives, which led to better than expected earnings per share in the quarter.”
Tax Reform Impact
Our net earnings for both fiscalyear-to-date periods include the effects of the tax reform act signed into law during December 2017. The fiscal 2019year-to-date period reflects the lower U.S. federal tax rate of 21% being fullyphased-in, and the first nine months of fiscal 2018 includes: (i) a benefit of $2.3 million ($0.05 per diluted share) primarily related to there-measurement of U.S. net deferred tax liabilities based on the new federal rate; and (ii) a charge of $0.9 million ($0.02 per diluted share) for the mandatory U.S. repatriation transition tax. The effective tax rates for the third quarter and first nine months of fiscal 2019 were 22%, and 23%, respectively.
Fiscal 2019 Guidance Including Effects of the Recently Completed Acquisition of GenePOC Business
For fiscal 2019, we expect our consolidated revenues to be down approximately 6%, with our Diagnostics segment revenues being down high-single-digits and our Life Science segment revenues being uplow-single-digits. We expect our adjusted(non-GAAP) operating margin to be approximately 18% to 19%, and our adjusted(non-GAAP) earnings per share on a diluted basis to be $0.63 to $0.65 per share. Adjusted earnings per share on a diluted basis assumes a tax rate of approximately 23%. Adjusted(non-GAAP) operating margin and earnings per share on a diluted basis excludes the effects of costs associated with acquisition activities, restructuring activities and selected legal proceedings. Seenon-GAAP financial measure reconciliation below.
Financial Condition
The Company’s financial condition remains sound. At June 30, 2019, cash and equivalents were $55.2 million and the Company had $49.2 million of borrowing capacity under its $125.0 million commercial bank credit facility. The Company’s bank-debt obligations under the bank credit facility totaled $75.8 million as of June 30, 2019.