Preliminary findings show no Pseudomonas bacteria cells survived after contact with a SULFUR MAGNET®–coated filter material. This is an encouraging early signal as the research advances into its next phase.
Standard H2 has received the results of a study conducted by the U.S. Army Combat Capabilities Development Command (DEVCOM) evaluating the company’s SULFUR MAGNET® technology. According to the report, the study concluded that the SULFUR MAGNET® was effective against Pseudomonas sp., a member of the class of microorganisms called Gram-negative bacteria. Bacteria in the Pseudomonas family are responsible for healthcare-associated infections such as pneumonia and wound infections and can be highly resistant to many antibiotics.
The finding is an important milestone in the ongoing development and evaluation of the SULFUR MAGNET® for potential antimicrobial applications, and it establishes a foundation for the more detailed testing now underway.
What the study found
In this first stage of testing, researchers spotted a Pseudomonas species – a gram-negative bacterium – onto coated and uncoated filter material and measured how many viable cells could be recovered after a 30-minute contact time. The early results were striking:
28% of viable cells were recovered from the uncoated material, while 0% were recovered from the SULFUR MAGNET®–coated material.
The 28% recovered from the uncoated control still represented more than one million viable cells — underscoring the scale of the reduction observed on the coated material.
No viable cells were observed on the coated filter material after 30 minutes of contact. Taken together, these preliminary numbers point to a significant reduction in viable gram-negative bacteria on SULFUR MAGNET®–treated material.
“These early results are very encouraging and reinforce the potential of our technology. Demonstrating effectiveness against gram-negative bacteria is a significant achievement and provides a strong foundation for continued research into additional antimicrobial applications.”
— James Wasas, Chief Science Officer, Standard H2
Where these bacteria sit in the resistance hierarchy
Microorganisms differ widely in how strongly they resist disinfection. The chart below, drawn from the well-established order of relative resistance to disinfectant chemicals, places the organisms in context, with the most resistant organisms at the top of the chart. The gram-negative bacterium tested in this study, Pseudomonas-sp strain PW, falls within the “vegetative bacteria” group.
Figure 1. Descending order of relative resistance to disinfectant chemicals.
This hierarchy shows why the current result is meaningful but also why further testing matters. Effectiveness against one class of organism does not automatically translate to others, and each additional class – including viruses, fungi, mycobacteria, and bacterial spores – needs to be evaluated directly before any conclusions can be drawn.
Potential applications
Standard H2 believes these findings could support future investigation into incorporating SULFUR MAGNET® technology into products designed to help reduce microbial contamination – among them air filtration systems, face masks, water filtration systems, HVAC components, and other protective materials. The SULFUR MAGNET containing materials could be particularly beneficial for hospitals since it is estimated that several tens of thousands of patients die from infections contracted in US hospitals each year. Realizing any of these applications will depend on continued research and application-specific validation.
What’s next
The team stresses that these are preliminary results, and important questions remain. Ongoing work is designed to distinguish how much of the observed reduction is attributable to SULFUR MAGNET® itself versus other factors – such as dehydration as the bacteria dry on the material, any inherent properties of the uncoated filter, how much of the bacterial load remains attached to the filter, and the effects of the cell-extraction procedure.
In the next stage, researchers plan to test at five-minute intervals from 5 to 30 minutes to better characterize how quickly the reduction occurs. Additional research will also be needed to evaluate performance against other microorganisms – including viruses, fungi, and parasites – and within specific commercial applications.
As those results come in, we look forward to sharing what we learn and to exploring partnerships that can help bring this technology to market.
SULFUR MAGNET® is a registered trademark of Standard H2, Inc.. The findings described here are preliminary and reflect an early stage of an ongoing research program; they have not been evaluated against viruses, fungi, or parasites, and no claims are made regarding efficacy against any specific pathogen.