Clothing to protect against infection
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Clothing to protect against infection - 1

DuPont Personal Protection CLOTHING TO PROTECT AGAINST INFECTION

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1 1. Introduction. 2 2. Protection when handling biological agents. 2 3. Protective clothing according to EN 14126: 2003. 4 4. Selecting protective apparel against biological agents. 7 5. Protective coveralls by DuPont Personal Protection. 8 Contents

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2 In recent years there has been an increasing number of incidents involving biological agents and the spread of highly infectious diseases, as often reported in the media. Epizootic diseases, such as bird flu or BSE, can lead to substantial economic losses and even food supply shortfalls. With tourism and business trips, there is a risk that tropical, highly infectious diseases, such as lassa fever or ebola, will also be brought into Europe. Severe acute respiratory syndrome (SARS) remained in the headlines for weeks because the outbreak was difficult to control, despite the many efforts...

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3 What are biological agents? A comprehensive definition can be found in EU directive 2000/54EC on biological substances. “Biological agents” refers primarily to micro-organisms such as bacteria, viruses and fungi. According to this directive, it also refers to biological materials, including those which have been genetically modified, as well as agents. What is important is that these substances can be pathogenic, sensitising or toxic. What are the biological agent risk groups? A distinction is made between four risk groups according to the risk of infection for humans. For each risk group...

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4 3. Protective clothing according to EN 14126:2003 According to the EU directive 2000/54EC on Biological Substances, employers are obliged to make suitable protective clothing available to their employees. What clothing provides protection against biological agents? According to EN 14126, in order to protect against bacteria, viruses and other micro-organisms, special re- quirements are defi ned for the clothing materials used to protect against infectious agents. These materials must protect the skin, and therefore the wearer, against possible contact with biological substances and...

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5 Table 1: Classification according to ISO/FDIS 16603 – Penetration by infected liquids, using synthetic blood. Pressurisation duration: 5 min Class Exposure pressure [kPa] 6 20 5 14 4 7 3 3,5 2 1,75 1 0 Virus test according to ISO/FDIS 16604: The virus test and classification run along the same lines as ISO/FDIS 16603, the only difference being that liquid contaminated with a bacteriophage or virus (Phi-X-174) is used instead of synthetic blood. Bacteria test according to ISO/DIS 22610: This draft standard sets out the procedure for testing a material’s resistance to wet bacterial...

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6 Table 3: Classification according to ISO/DIS 22611 – Resistance to penetration by biologically contaminated aerosols Class Penetration ratio without/with test material [log] 3 > 5 2 > 2 1 > 1 Note on the reading of these results: By means of an example, according to this classification, a Class 1 barrier material allows the penetration of up to 100 of the 1,000 bacteria on the surface sprayed with the aerosol (i.e. 10% of the bacteria). Class 2 materials of the same surface size allow 10 of the 1,000 through (1%) and material in the highest class (3) allow the penetration of just 1 of...

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7 How should users select their protective apparel against infectious agents? The current standards on chemical protection and bio barriers should of course be taken into consideration. The first thing to do when making a selection, however, is to carry out a risk assessment. By starting from the type of biohazard and assessing the transmission paths, it is possible to gain insight into the geometric dimensions of a particular biological substance. These extend from subviral particles to viruses with nanometre dimensions and parasites with micrometre dimensions and beyond. If the...

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8 TYVEK® and TYCHEM® bio barriers: For safe protection against biological agents In addition to the tests for chemical protective clothing, TYVEK® and TYCHEM® protective clothing materials by DuPont are tested using special procedures for determining the effectiveness of the barrier against infectious agents. Direct contact with bacteria, biologically contaminated liquid aerosols and solid particles is determined in this way and the bio barrier tested. Simply wearing protective clothing will not guarantee protection. The protective effect of the suits can only be ensured if the clothing is...

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9 Also available with integrated socks! Thumb-loops are now a standard garment feature. Chemical Protective Coveralls, Category III * * * ** *** Type 4 Type 5 Type 6 EN 14126 Type 4B EN 1149-1 EN 1073-2 . Barrier against many inorganic chemicals in low concentrations and particles larger than 1ìm . Protection against particulate radioactive contamination . Barrier against solid biological contaminated particles of risk groups 1 and 2 . Combines the reliable performance of a Type 4B with the comfort of a nonwoven suit . Suitable for usage in Ex-Zones . Contains no halogen compounds so can be...

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10 Chemical Protective Coveralls, Category III * * * * ** *** Type 3 Type 4 Type 5 Type 6 EN 14126 Type 3B EN 1149-1: 1995 EN 1073-2 . Protection against numerous inorganic chemicals . Resists liquid splashes up to 2 bar . Particle-tight fabric . Biological protection – meets the EN 14126 requirements in the highest performance class . Protection against particulate radioactive contamination . Particularly lightweight protection . Suitable for usage in Ex-Zones . For applications where decontamination is needed: the fabric is resistant to certain commonly used decontamination substances ....

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12 Chemical Protective Coveralls, Category III * * * * ** *** Type 3 Type 4 Type 5 Type 6 EN 14126 Type 3B EN 1149-1: 1995 EN 1073-2 . Protection against numerous organic and highly concentrated inorganic chemicals . Resists liquid splashes up to 5 bar . Particle-tight clothing material . Biological protection – meets the EN 14126 requirements in the highest performance class . Protection against particulate radioactive contamination . Suitable for use in Ex-Zones . For applications where decontamination is needed: the fabric is resistant to commonly used decontamination substances ....

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