Fentiman backs off…

fentiman churchill

At the Regina Court this morning, F. William Johnson, QC., BA., LL.B., B.C.L. (OXON) representing Specialist Hygiene Solutions Ltd, preempted the proceedings by requesting an adjournment as instructed by his client.

I have no doubt whatever that the unprecedented response to yesterday’s deproxfraud.info post is the reason for this abrupt about-turn.

By the end of the day, that one article had received a staggering 595 hits, and this in spite of the USA being otherwise occupied. The top 5 countries of origin are listed below:

Fentiman visits

A heartfelt thank you to everyone who visited the site, and especially to those who spread the word via social media to achieve this resounding endorsement of the battle against corrupt medical equipment manufacturers.


Since the news of Fentiman’s intended legal action was published, late on July 3rd, the blog posts have received an unprecedented 1349 views, 373 of which were from Australia and New Zealand. At the time of writing, 10.22am July 6th, today’s views are already at 190 and rising fast!

fentiman 4

deproxfraud.info views as of 10.22 am July 6th.


Fentiman seeks court order to gag Deprox whistleblower


Regina Courthouse

On Wednesday 5th July 2017, Hygiene Solutions Ltd. will attempt to register a gagging order against Richard Marsh, a former Deprox engineer, in an attempt to close down the highly embarrassing deproxfraud.info website.

The hearing will be before The Honourable Mr. Justice B.A. Barrington-Foote, who had already rejected a previous submission from Fentiman on the same lines. The case is at 9.00am, at the Regina Court of the Queen’s  Bench, 2425 Victoria Avenue, Regina, SK  S4P 4W6, Phone: (306) 787-5377.

The hearing is open to the public, and the documents filed in connection with the case may be examined and copied at the Registrar’s desk in the Courthouse.

It is of note that after 9 months and (as of this afternoon) 35,634 views of deproxfraud.info, Hygiene Solutions has finally attempted this legal action by way of an obscure legal instrument called a “Tomlin Order”.  If the shocking allegations made by deproxfraud.info are false, as Fentiman and Co. maintain, why wouldn’t they have sued for libel and defamation in September when the website was first published?

While the application is expected to fail, deproxfraud.info will continue publication regardless of the outcome.


This post has broken the record for daily hits. Since publication yesterday afternoon, this post has received 553 hits and still rising fast. The daily total is expected to top 600.


Deprox Cowboys!

Cowboys Deprox

Incredibly, so-called “Hygiene Solutions Ltd” whose Deprox and Ultra-V machines are wheeled in to intensive care units and operating theatres on a daily basis, operates from the back of a dirty farming and livestock supplies warehouse, belonging to D&H Animal Husbandry. Here the Deprox units of their “On-call decontamination service” are stored between call-outs alongside pails of cattle feed and assorted agricultural and veterinary detritus.aisle-g-1

Here is another view of the real Hygiene Solutions.  I have added some notes for the non-technical reader.aisle-g-2

  1. Deprox machines
  2. RangerLick Cattle Plus Mineral Buckets
  3. Deprox vent cap accessory
  4. Deprox vent cap accessory telescopic poles
  5. Stepladders for short Deprox operators
  6. Mix of crumpled polythene, brown paper and sticky tape
  7. Pallets of Deproxin.

The covert camera video below gives a good idea of the grubby reality behind Hygiene Solutions polished sales presentations:

These less than ideal surroundings are fertilised by a regular stream of D&H customers, arriving “fresh” from their chicken sheds, stables, pig barns and cow pastures, who trek malodorously  through “Hygiene Solutions Ltd” to the trade counter at the back of the barn.Deprox shit.PNG

Do you really want your ICU cleaned by cowboys?


JHI letter damns Wilson’s Deprox test

A letter published on May 31st in the Journal of Hospital Infection shows Prof Peter Wilson’s controversial Deprox test results can be attributed to the very high level of (now illegal) silver nitrate in the Deproxin disinfectant solution. Wilson’s paper had already been strongly criticised by Dr Jon Otter of Imperial College, who suggested that Deprox manufacturer Hygiene Solutions Ltd. had added “A dash of peracetic acid” to the mix in order to achieve the improbable results.

However, as Dr Singh points out in the letter, the explanation is that Deproxin contains a whopping 2000ppm of silver nitrate, forty times as much as the ASP Glosair system that Dr Otter was comparing it to. The spray of silver nitrate solution settles on the BIs (conveniently unpouched and placed face up) and is concentrated by evaporation to highly germicidal levels. Meanwhile the volatile hydrogen peroxide component is dispersed and diluted through the volume of the room, and may play relatively little part in the process.

This substantial silver nitrate content is confirmed by a Daily Mail report from the Royal Liverpool Hospital, where a patient complained of “black grime” on the inside of the windows. The Hospital explained that it was a “sterile residue” from the hydrogen peroxide decontamination process. The hospital was using the Deprox process at the time.

Deprox mail

By an interesting coincidence, the JHI “articles in press” also has another paper on the antimicrobial efficacy of silver nitrate. This paper shows the MIC (Minimum Inhibitory Concentration) of silver nitrate for a range of vegetative bacteria, as below:

“The silver nitrate MIC was tested on a total of 443 isolates, ranging from 16 to 32 mg/L for the majority of the tested strains with or without sil genes. For Enterobacter and Klebsiella spp., elevated MIC (≥64 mg/L) for silver nitrate was recorded in E. cloacae (15/99, 15%), E. aerogenes (2/29, 7%), K. oxytoca (2/59, 3%), and K. pneumoniae (2/95, 2%).”

Note that 1mg/L = 1ppm. These bacterial strains were inhibited by just 16 to 32ppm AgNO3, compared to 2000ppm in Deproxin. No wonder the BIs were sterilised!

Hygiene Solutions Ltd is now between the devil and the deep blue sea. Do they remove the silver nitrate from the Deproxin, in which case their already shaky “validated to achieve a log 6 reduction” claim collapses, or do they continue the ludicrous pretense that the silver nitrate is actually just “silver” – in spite of the obvious point that metallic silver is a powerful catalyst for the decomposition of hydrogen peroxide?

This is a dilemma for hospital staff also, as according to the HSE it is illegal to use a PT2 (i.e. fogging or airborne) product containing silver nitrate. There can be no question that silver nitrate is an “active ingredient” in Deproxin. The Deprox unit contains a palladium catalyst to remove the hydrogen peroxide at the end of the process – however, this catalyst will not remove the silver nitrate, leaving an extremely fine dust or droplets of silver nitrate solution in the air when the room is re-entered. This chemical is highly toxic by inhalation, with a legal limit of just 0.01mg/m³. Certainly it would be risky to re-enter treated rooms without some kind of measurement process to assess the air quality.

Deprox nitrate

For those without access to the JHI, I have reproduced Dr Singh’s letter below.


I note with interest the May 2016 article by S. Ali et al. “Efficacy of two hydrogen peroxide vapour aerial decontamination systems for enhanced disinfection of meticillin-resistant Staphylococcus aureus, Klebsiella pneumoniae and Clostridium difficile in single isolation rooms.”[1]

The two systems compared in this study use very different concentrations of hydrogen peroxide, and yet showed almost indistinguishable efficacy in these tests.

This would lead to the conclusion that the bactericidal and sporicidal efficacy of H2O2 is independent of concentration, which seems improbable – indeed, previous comparative evaluations of a high-concentration (30%) hydrogen peroxide system (Bioquell) with a low-concentration (5%) hydrogen peroxide system (ASP Glosair) by Fu et al.[2] Holmdahl et al.[3] and Beswick et al.[4] have demonstrated that the low-concentration fogging only achieved log reduction factors (LRF) of between 2 and 4, which was much smaller that the LRF of 6 generally achieved with the higher hydrogen peroxide concentration.

I would suggest that the unexpectedly high efficacy of the 4.9% hydrogen peroxide system evaluated by S. Ali et al. may be attributable to the relatively high level of silver nitrate in the proprietary Deproxin solution. The Deproxin MSDS[5] states: “CAS: 7761-88-8 Silver <0.2% EINECS: 231-853-9”. While “Silver” is given as the description, the CAS and EINECS numbers show that this is in the form of silver nitrate. In terms of ppm, 0.2% equates to 2000ppm. By contrast, the ASP Glosair system evaluated in the three papers mentioned above contained “<50ppm silver nitrate”. The solution used by S. Ali et al. thus apparently contained around forty times more “silver” than solutions used in systems previously evaluated.

Even at 2000ppm, the silver nitrate in Deproxin is considerably less concentrated than the hydrogen peroxide, by a factor of 25. (0.2% AgNO3: 4.9%H2O2) However, there is an important difference in the mode of distribution for these two active ingredients that may tend to preferentially concentrate the silver nitrate in the vicinity of the biological indicators. The hydrogen peroxide is volatile and unstable, and as the fog droplets evaporate, it is distributed throughout the whole volume of the room (about 60m3 in the example given), where the concentration then drops substantially with elapsed time as it spontaneously decays to oxygen and water. The silver nitrate however is not at all volatile, and is persistent.

The final distribution of the silver nitrate is hard to predict, but it may be assumed that much of it eventually drops to the floor or other horizontal surfaces in the room, either as solid particles or as droplets of solution that have been concentrated by partial evaporation. In the tests performed by S. Ali et al., biological indicators(BIs) were placed in horizontal, upwards facing orientation. If these BIs became saturated with a film of Deproxin solution from the fogging process, it can be expected that as the water evaporated during the “deactivation” cycle, the concentration of the silver nitrate would rise from the initial figure of around 2000ppm to substantially higher levels. It is of note that according to S.R.K. Pandian et al.[6] the MIC (Minimum Inhibitory Concentration) of silver nitrate for the spore-forming Bacillus licheniformis is only 5mM, which is equivalent to 850ppm.

There is some circumstantial evidence to support this explanation. S Ali et al. referring to the Deprox system state; “When rooms were disinfected using HPS2, C. difficile persisted most frequently underneath the bed and window frame in 6/21 cases (28.6%).” The “window frame” position is described as being “approximately 2m above floor” where the room height is given as 2.7m. The two positions pointed up as showing the lowest LRFs for the fogging system were those positions with the most restricted headspace – 0.7m in one case and presumably the same or less under the bed. These positions would have received the least precipitation from settling fog droplets or dust, so may have received proportionally less of the silver nitrate.

It would be very instructive to repeat the experiment without the hydrogen peroxide, and thus determine the log reduction attributable to a 2000ppm silver nitrate solution alone.

Conflict of interest



  1. S. Ali, M. Muzslay, M. Bruce, A. Jeanes ,G. Moore, A.P.R. Wilson et al. Efficacy of two hydrogen peroxide vapour aerial decontamination systems for enhanced disinfection of meticillin-resistant Staphylococcus aureus, Klebsiella pneumoniae and Clostridium difficile in single isolation rooms. J Hosp Infect. 2016; 93: 70–77
  2. Fu, T.Y., Gent, P., and Kumar, V. Efficacy, efficiency and safety aspects of hydrogen peroxide vapour and aerosolized hydrogen peroxide room disinfection systems. J Hosp Infect. 2012; 80: 199–205
  3. Holmdahl, T., Lanbeck, P., Wullt, M., and Walder, M.H. A head-to-head comparison of hydrogen peroxide vapor and aerosol room decontamination systems. Infect Control Hosp Epidemiol. 2011; 32: 831–836 Beswick, A.J., Farrant, J., Makison, C. et al. Comparison of Multiple Systems for Laboratory Whole Room Fumigation. Applied Biosafety. 2011; 16
  4. Sevron Safety Solutions. http://sevron.co.uk/msds/deproxin-msds-download-2/[accessed 11.05.17]
  5. Pandian, S.R.K., Deepak, V., Kalishwaralal, K. et al. Mechanism of bactericidal activity of Silver Nitrate – a concentration dependent bi-functional molecule. Braz J Microbiol. 2010; 41: 805–809

Freedom of Information request reveals exact C. difficile/Deprox correlation.

C. difficile 1

A Freedom of Information request¹ to UCLH disclosed the starting and finishing dates of their disastrous Deprox decontamination contract with Hygiene Solutions Ltd. The Deprox operations started in June 2013 and ran continuously, 7 days per week through to October 2016. The contract called for at least 4 Deprox units to be at the hospital, and 6 or more processes to be completed daily.

However, due to frequent breakdowns, Hygiene Solutions struggled to meet their obligations, and on occasion asked engineers to put a non-functional Deprox unit in a room, tape up the door and “run” a process – thus not only defrauding the NHS but leaving a dangerously contaminated room that the staff believed to have been sterilized.

Plotting the contract dates against the quarterly UCLH C. difficile data² (extended through 2016 with mandatory government reporting data)³  reveals an exact correlation between the period of Deprox deployment and a substantial step change in the number of C.difficile infections  – approximately 70 extra cases over the 29 month period.

According to the March 2016 government report on C. difficile mortality, the 30 day mortality rates for the London area were about 17%. –  suggesting that approximately 12 deaths in this period could be attributed to Deprox operations. Any patients who acquired C. difficile or any other Heathcare Associated Infection, (HAI) in the UCLH hospitals between June 2013 and October 2015 should consider contacting a medical negligence solicitor and seeking compensation.

Deprox pushed UCLH in to high risk category for C. diff – CQC reports.

The CQC (Care Quality Commission) makes regular evaluations of NHS trusts using a list of critical indicators. These are the Intelligent Monitoring reports. The extracts from a series of these reports below show how the “Incidence of C. difficile” indicator moved from “No evidence of risk” to “Elevated Risk” when the Deprox program was implemented. The complete reports can be found at: http://www.cqc.org.uk/provider/RRV/reports

Deprox UCLH

[1] https://www.uclh.nhs.uk/aboutus/wwd/Annual%20reviews%20plans%20and%20reports%20archive/Infection%20Control%20Annual%20Report%202015-16.pdf  (See graph, p.17)

[2] https://www.gov.uk/government/statistics/clostridium-difficile-infection-monthly-data-by-nhs-acute-trust

[3] https://www.uclh.nhs.uk/aboutus/FOI/FOI%20disclosure%20list/FOI2017271Response.pdf


ultra-vfraud.info – a new editor, a new website launched.


A change of editor presents opportunity for a fresh approach. The extraordinary extent of Hygiene Solutions’ unscrupulous activities, ranging from misleading puffery to complex and ingenious corruption of “independent” scientific testing, generates a challenging volume and variety of data to present.

To simplify this task, I have launched a new website, www.ultra-vfraud.info, to expose Hygiene Solutions’  egregious lies as to their new Ultra-V product, while www.deproxfraud.info will concentrate on the Deprox scandal, now entering its final phase as the HSE investigation nears completion.

A recent “Freedom of Information” request has yielded some extraordinary data on Deprox efficacy. This independently verifiable dataset demonstrates a 25% increase in C. dificile incidence in a major UK NHS trust, correlated exactly to a 28 month period of intensive Deprox use. This will be published here shortly.

“Facts are stubborn things.”

John Adams, second President of America

The more the truth is tested and examined, the more firmly it stands. Lies, however credible at first glance, become shaky on close examination, and a determined investigation will reduce them to shreds and tatters. The mission of these websites is to present the facts, however unpalatable, about Hygiene Solutions Ltd, its criminally negligent directors and its dangerous and dishonestly promoted Deprox and Ultra-V products.

Dr Ecosse