Can I use Hygicult contact slides for detecting dermatophytes like Trichophyton menatgrophytes or T.rubrum?
Dermatophytes (Trichophyton, Epidermophyton) can infect skin, hair and nails. You may become exposed to dermatophytes at public swimming baths and in other wet areas. However, normal healthy skin does not easily become infected. Dermatophytes grow on Hygicult Y&F but you cannot use Y&F for detecting these species specifically. Y&F is a growth medium for all yeasts and moulds.
Is Hygicult suitable for detecting bacteria in water?
The quality of drinking water should be tested according to the laws and regulations in your country. Please contact your local food safety authorities or environmental laboratories for further information.
Hygicult can be used for monitoring sewage waters and cooling towers, but it is not sensitive enough for drinking water. The sensitivity limit for Hygicult TPC is 1000 cfu/ml or cfu/cm2, while the limit for drinking water is < 100 cfu/ml.
Can Hygicult contact slides be used as a transport medium if a sample needs to be taken to a microbiology lab for further cultivation?
Yes. Hygicult contact slides are excellent for this purpose.
Can Enterobacteria be detected from a sample that has been frozen?
Yes. Enterobacteria can survive when frozen.
The medium has detached either partially or totally. Why is that? Is the slide still usable?
Do not use the slide. Agar drop-off is most likely due to rough handling during transport.
Which bacteria strains grow on Hygicult TPC?
TPC is covered with Total Plate Count agar which supports the rapid growth of the most common bacteria and moulds. A comprehensive study on all possible organisms has not been carried out, nor is it necessary to carry out such a study. It is important to understand that TPC is not meant for detecting any microbe specifically; rather, it is intended to be used as an indicator for the level of general microbial contamination.
What is the volume of the sample Hygicult dipslide picks up when dipped?
The volume is estimated to be 40 - 50 μl per slide.
In which cases is Hygicult more suitable for environmental hygiene analysis than the ATP (luminescence) method?
Whenever the number of living bacteria is required. The number of living bacteria indicates the hygienic status of a surface and whether it is a potential hazard as items that come into contact with it may become contaminated.
Do any of the Hygicult products specifically identify microbes (such as Legionella or other pathogens)?
No, they do not. You need to use pathogen-specific methods.
What is the surface area of a Hygicult contact slide?
One side of Hygicult contact slide is about 8.5 cm2, and both sides together have a surface area of about 17 cm2.
The culture medium has an orange-like appearance. What is wrong? Is the slide still usable?
The slide is unusable. The most probable reason is freezing. When frozen, the tubes most likely contain an excessive amount of water.
The medium has flattened, although the expiry date has not yet passed. Why is that? Is the slide still usable?
The agar is usable if the medium has shrunk less than 2 mm from the edges of the plastic frame and the meniscus of the agar pad is over the edges.
There is liquid in the tube. Can I use the contact slide in spite of the liquid?
The liquid is water which has condensed from the agar onto the tube walls due to temperature fluctuations. If the volume of water is only droplets and the agar looks normal, you can use the contact slide. You can shake the extra droplets out before closing the tube after sampling.
What does it mean in practice that Hygicult can be performed “on-site”?
It means that you can do sampling, incubation and interpretation on-site and avoid sending the samples to a lab, thereby also avoiding lab costs.
The advice is to dispose Hygicult by immersing it in a suitable disinfectant overnight. Is there any disinfectant you can recommend?
Any disinfectant intended for disinfecting surfaces is suitable for this purpose. It is difficult to recommend one because there are a variety of disinfectants available worldwide with different brand names. It is most convenient to use the one which is available in the facility.