Rainer Blair
President & Chief Executive Officer at Danaher
Well, thank you, John, and good morning, everyone. We appreciate you joining us on the call today.
Core revenue in the third quarter came in ahead of our expectations, with Biotechnology performing as anticipated, and higher testing revenues more than offsetting slightly softer-than-anticipated demand in Life Sciences. Our team's consistent DBS-driven execution also enabled us to deliver better-than-expected earnings and cash flow in what remains a challenging and dynamic operating environment.
This was also a transformative quarter for Danaher. On September 30th, we completed the spin-off of Veralto Corporation, a global leader in water and product quality. The successful launch of Veralto is a testament to the team's execution focus and outstanding teamwork. We believe this separation creates exceptional opportunities for both Danaher and Veralto to better serve their customers, deliver on their respective strategic priorities, and create greater long-term shareholder value in the years ahead. Now, I want to thank Jennifer Honeycutt and all the Veralto associates for their contributions to Danaher over the past two-plus decades. And we wish them the very best as they embark on their exciting endeavor to help safeguard the world's most vital resources.
Now going forward, Danaher is a more focused life sciences and diagnostics innovator, committed to accelerating the power of science and technology to improve human health. We've got a great line-up of leading franchises well-positioned in attractive end-markets with durable, high recurring revenue business models and our strong free-cash flow generation positions us well to further enhance our portfolio going forward. This unique combination of our leading science and technology portfolio and financial strength, all powered by the Danaher Business System differentiates us and reinforces our sustainable long-term competitive advantage.
So with that, let's turn to our third quarter results in more detail. Now John mentioned since Veralto was part of Danaher through the end of the third quarter, our financial highlights for the third quarter include Veralto's results. Sales were $6.9 billion in the third quarter and core revenue declined 11.5%, including a 3% decline in our base business and a COVID-19 revenue headwind of approximately 8.5%. Geographically, core revenues in developed markets declined low double-digits, primarily driven by lower COVID-19 revenues. High growth markets were down high single-digits, including a mid-teens decline in China where the economic landscape remains challenging.
Our gross profit margin for the third quarter was 58.2%. Our operating margin of 20.9% was down 540 basis points, primarily due to the impact of lower volume in our Biotechnology and Diagnostics segment, and costs related to the separation of our Veralto.
Adjusted diluted net earnings per common share were $2.02. We generated $1.3 billion of free cash flow in the quarter and $4.6 billion year-to-date, resulting in a year-to-date free cash flow to net income conversion ratio of more than 120%. Strong free cash flow generation continues to be one of the most important metrics at Danaher and enabled us to actively pursue high impact organic growth and M&A opportunities.
Now let's take a closer look at our results across the portfolio and give you some color on what we're seeing in our end-markets today. Reported revenue in our Biotechnology segment declined 19% and core revenue was down 21%. Bioprocessing core revenue declined over 20% as anticipated, while discovery and medical was down mid single-digits as a result of lower demand from our earlier stage research and lab filtration customers.
In Bioprocessing, base business core revenue declined mid-teens and market conditions were consistent with our expectations coming into the third quarter. Our customers are still working through inventory built-up during the pandemic, while also continuing to conserve capital as a result of funding pressures. China was down approximately 45% in the quarter, driven by a weak funding environment and lower underlying activity levels. Based on what we're seeing today, we are maintaining our full year outlook of approximately 10% base business decline in Bioprocessing which assumes that market conditions in the fourth quarter are consistent with what we saw in the third quarter.
Although these market dislocations are impacting our recent performance, global demand for biologic medicines continues to increase. Since 2018, underlying demand for biologics has grown at an average annual rate of approximately 10% and is continuing to grow in 2023. In addition to more patients using biologic medicines, this year is on pace to be a record year for FDA approvals of biologics, including approvals for meaningful indications such as Alzheimer's disease, and several cancer immunotherapies. These positive trends reinforce our conviction in the tremendous opportunity ahead in the biologics market and the high single-digit long-term growth outlook for our leading bioprocessing franchise.
Now the pace of innovation and advancements in biologic medicine is accelerating and Cytiva is uniquely positioned to support customers as they pursue life changing breakthroughs. Cytiva's recently launched NanoAssemblr, the industry's first end-to-end lipid nanoparticle formulation system is a great example of how our investments in innovation are supporting customers' needs around quality, yield and cost. NanoAssemblr automates and streamlines the lipid nanoparticle manufacturing workflow, helping improve reproducibility and scalability in the nucleic acid therapy manufacturing process.
Turning to our Life Sciences segment, reported revenue declined 1%, and core revenue was down 2.5% including a low single-digit decline in our base business. Our Life Sciences instrument businesses collectively declined mid single-digits, in part driven by China, where an already challenging funding environment further deteriorated as the quarter progressed. Outside of China, we continued to see softness at pharma and biopharma customers, while demand remained stable in Life Science research and applied markets.
Our genomics consumables base business declined low single-digits in the quarter. Double-digit growth across plasmids, proteins, and gene writing and editing solutions, which are primarily used in projects that are in later stages of the drug development pipeline or have been commercialized was more than offset by declines in next-generation sequencing and basic research.
Our Life Sciences businesses continued to deliver innovative solutions that are helping accelerate the discovery and development of biologic medicines. Molecular Devices recently released the CellXpress.ai, an artificial intelligence driven cell culture system that automates traditionally manual cultivation processes. The CellXpress.ai is engineered to improve workflows and reproducibility in growing and scaling human relevant cell lines, which can reduce reliance on animal models and fast-track potential therapeutics to preclinical trials.
We're also actively leveraging strategic M&A to enhance our capabilities and bring greater value to our customers. In August, we announced our intention to acquire Abcam, a leading producer of protein consumables that are critical for advancing drug discovery, life science research, and diagnostics. Abcam has a long track-record of innovation, outstanding product quality, and breadth of antibody portfolio which positions them as a key partner for the scientific community. The addition of Abcam will give Danaher entry into this highly attractive market, furthering our strategy to help map complex diseases and accelerate the drug discovery process. We expect Abcam will be accretive on multiple levels including core growth, earnings, and talent, and look forward to welcoming this incredibly innovative team to Danaher once the transaction closes.
Now moving to our Diagnostics segment. Reported revenue declined 16% and core revenue declined 15.5% with mid single-digit growth in our base business more than offset by lower COVID-related respiratory testing volumes at Cepheid. Our clinical diagnostics businesses collectively delivered mid single-digit core revenue growth. Radiometer led the way with high single-digit core growth and solid results across both blood gas and point-of-care immunoassay product lines.
Beckman Coulter Diagnostics was up mid single-digits with double-digit growth in instrumentation and notable strength across clinical chemistry and immunoassay. Beckman's recent strong performance is a direct result of leveraging the Danaher Business System to improve commercial execution. We're seeing better win and retention rates globally, particularly in North America, which grew high single-digits in the third quarter. The team has also been accelerating new product innovation and there's encouraging early traction in Europe for the DxI 9000, Beckman's next-generation immunoassay analyzer.
In Molecular Diagnostics, increased menu utilization by customers, paired with recent new product innovation helped drive over 20% core revenue growth in non-respiratory testing at Cepheid, including more than 25% core revenue growth in Group A Strep and sexual health. In respiratory testing, Cepheid's revenue of approximately $350 million in the quarter exceeded our expectations of $100 million. The higher prevalence of COVID-19 drove both higher volumes and a preference for our four-in-one test for COVID-19, flu A, flu B and RSV.
As we move into the fourth quarter and our customers begin planning for the respiratory season, we now expect approximately $1.6 billion of respiratory testing revenue for the full year versus our previous expectation of $1.2 billion. The broad-based strength across Cepheid's testing menu is a result of the team's thoughtful approach to placing systems over the last few years. Customers who realized the benefit of accurate, easy-to-use molecular testing during the pandemic are increasingly consolidating their point-of-care testing platforms on to the GeneXpert and adding additional assays from our leading test menu. Their preference for the GeneXpert within their labs and across their health care networks has led to a more than 2.5 times increase in both our installed base and revenue since 2019. And we believe Cepheid is well-positioned to continue gaining share and expanding our installed base in today's endemic environment.
Now, let's briefly look ahead at the expectations for the fourth quarter and the full year. As a reminder, both our fourth quarter and full year guidance include only Danaher's continuing operations and exclude Veralto. In the fourth quarter, we expect core revenue in our base business to be down mid single-digits year-over-year. We also expect total core revenue to decline in the high-teens percent range, primarily as a result of lower demand for COVID-19 testing, vaccines, and therapeutics. Additionally, we expect the fourth quarter adjusted operating profit margin of approximately 28%, which includes additional anticipated productivity initiatives to further adjust our cost structure.
Turning to the full year 2023, we anticipate core revenues in our base business will be down slightly. And we also expect total core revenue to decline low double-digits for the year as a result of lower demand for COVID-19 testing, vaccines, and therapeutics. Additionally, we expect a full year adjusted operating profit margin of approximately 29%.
So to wrap-up, we're pleased with our third quarter results and believe the combination of our team's DBS-driven execution and differentiated portfolio enable Danaher to outperform on a relative basis. With the successful spin-off of Veralto, we are now a more focused company committed to deploying leading-edge science and technology to improve human health. Danaher is purpose-built to help customers solve some of the most important health challenges impacting patients around the world. Our proven ability to innovate is enabling faster, more accurate diagnoses, and helping customers reduce the time and cost needed to sustainably develop and deliver life-changing therapies.
So, as we look ahead, the unique combination of our talented team, differentiated science and technology portfolio, and balance sheet optionality, all powered by the Danaher Business System positions as well to maximize value for our customers, our associates, and our shareholders.
So with that, I'll turn the call back over to John.