Technical information, Overview, Limit of detection – Nova-Tech Orbeco-Hellige Legionella Swab Test Kit User Manual
Page 2: Test operating limits, Disposal, Storage, Specificity
 
Overview
Within a water system Legionella usually grow within biofilm (slime) found on the insides of pipe work, shower 
heads, cooling tower packing, or water tanks. Bacteria found in the planktonic phase (i.e. suspended in the 
water itself) are usually an indicator of colonization of the biofilm. 
 
Since a clean water sample does not equate to a clean system (proliferation of legionella is greater in a biofilm 
than in water), this kit can be used to pinpoint the contamination in a system or to demonstrate cleanliness of 
an area after a targeted 
cleaning. The test operates via a Lateral Flow Immuno-Chromatographic Assay (LFICA).
Each Swab Test Kit contains the following:
	
• 5 Individually foil -wrapped tests -- each contains an exact volume pipette
• 1 bottle of Recovery Buffer, 65 ml (part number L100119)
• 5 Swabs
• 5 Re-suspension Tubes
• Instructions for use
This test is intended for analysis of biofilm samples only. This product is not intended for clinical or medical 
diagnostic use.
 
The product is intended to be used as part of an overall water treatment, management, and risk reduction 
approach and should NOT be used as the sole method for assessing risks associated with Legionella bacteria.
Limit of Detection
The mathematical theoretical limit of detection of the test is equivalent to 200 CFU / swabbed area.
Test Operating Limits
The	test	has	been	evaluated	for	operation	between	10-40ºC	(50-104ºF).
 
A	wide	range	of	non-oxidizing	biocides	and	biodispersants	have	been	checked	for	cross	reaction	and	inference	
with the test. This test should not be used on systems treated with biguanide based biocides! 
 
Performance of the Swab Test Kit with samples other than those taken from Cooling Towers, Domestic Hot & 
Cold water systems and Whirlpool spas has not been established.
Disposal
The test cannot be reused or recycled. The packaging materials and this instruction manual can be recycled.
Storage
The test is intended for storage at room temperature. Do Not Freeze. When stored correctly, the test will 
continue	to	operate	within	design	specifications,	until	the	specified	expiration	date.		Do not use the test after 
the stated expiration date specified on the packaging, Do not use any test where the foil packaging 
is damaged.
Specificity
The test has been shown to be non-reactive with the following bacteria ( at 1 x 10
8
organisms per sample):
Staphylococcus aureus and Legionella pneumophila serogroups 4 & 7 in concentrations higher than 1x10
8
organisms per sample may interfere with test results in negative samples.
Acinetobacter calcoaceticus, 
Aeromonas hydrophila subsp. 
hydrophila, Bacillus subtilis, 
Burkholderia cepacia, Citrobacter 
freudii, Citrobacter koseri, 
Escherichia coli, Enterobacter 
cloacae, Klebsiella oxytoca, Pseu-
domonas 
aeruginosa, Pseudomonas 
fluorescens, Pseudomonas putida, 
Pseudomonas stutzeri, 
Ralstonia pickettii, Raoultella 
terrigena, Streptococcus pyro-
genes, Yersinia ruckeri
Technical Information