PCR Detection of Microbial Pathogens PCR Detection of Microbial ...

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Pre-PCR Processing 31 2 Pre-PCR Processing of Samples Peter Rådström, Rickard Knutsson, Petra Wolffs, Maria Dahlenborg, and Charlotta Löfström 1. Introduction Diagnostic polymerase chain reaction (PCR) is an extremely powerful rapid method for diagnosis of microbial infections and genetic diseases, as well as for detecting microorganisms in environmental and food samples. However, the usefulness of diagnostic PCR is limited, in part, by the presence of inhibitory substances in complex biological samples, which reduce or even block the amplification capacity of PCR in comparison with pure solutions of nucleic acids (1). Thus, the presence of substances interfering with amplification will directly influence the performance of diagnostic PCR and, in particular, the assay’s sensitivity of detection. Some inhibitors may dramatically interfere with amplification, even at very small amounts. For example, PCR mixtures containing the widely used Taq DNA polymerase are totally inhibited in the presence of 0.004% (v/v) human blood (2). Consequently, sample processing prior to PCR is required to enable DNA amplification of the target nucleic acids in the presence of even traces of PCR-inhibitory substances. To improve diagnostic PCR for routine analysis purposes, the processing of the sample is crucial for the robustness and the overall performance of the method. In general, diagnostic PCR may be divided into four steps: (i) sampling; (ii) sample preparation; (iii) nucleic acid amplification; and (iv) detection of PCR products (Fig. 1). Pre-PCR processing comprises all steps prior to the detection of PCR products. Thus, pre- PCR processing includes the composition of the reaction mixture of PCR and, in particular, the choice of DNA polymerase and amplification facilitators to be used. This chapter will focus on sample preparation and the use of appropriate DNA polymerases and PCR facilitators for the development of efficient pre- From: Methods in Molecular Biology, vol. 216: PCR Detection of Microbial Pathogens: Methods and Protocols Edited by: K. Sachse and J. Frey © Humana Press Inc., Totowa, NJ 31
32 Rådström et al. Fig. 1. Illustration of pre-PCR processing. The figure shows the different steps in diagnostic PCR. Pre-PCR processing refers to sampling, sample preparation, and DNA amplification with the addition of PCR facilitators and the use of an appropriate DNA polymerase.
Page 1 and 2: TM Methods in Molecular Biology VOL
Page 3 and 4: 4 Sachse 2. Selection of Target Seq
Page 5 and 6: Table 1 Target Sequences Used in PC
Page 7 and 8: 8 Sachse Fig. 1. Structural organiz
Page 9 and 10: 10 Sachse proteins (66-68), invasio
Page 11 and 12: 12 Sachse Since there appears to be
Page 13 and 14: 14 Sachse In the context of identif
Page 15 and 16: 16 Sachse to partially compensate t
Page 17 and 18: 18 Sachse nostic potential of PCR.
Page 19 and 20: 20 Sachse product has to be confirm
Page 21 and 22: 22 Sachse 7. van Camp, G., Fierens,
Page 23 and 24: 24 Sachse 33. Rappelli, P., Are, R.
Page 25 and 26: 26 Sachse 60. Furrer, B., Candrian,
Page 27 and 28: 28 Sachse 89. Bloch, W. (1991) A bi
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Page 33 and 34: 34 Rådström et al. immunoglobulin
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Page 43 and 44: 44 Rådström et al. neous. Consequ
Page 45 and 46: 46 Rådström et al. 11. Powell, H.
Page 47 and 48: 48 Rådström et al. 39. Katcher, H
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Page 51 and 52: 52 Hoorfar and Cook 2. FOOD-PCR: A
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82 Lübeck and Hoorfar 70. Lawrence
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84 Lübeck and Hoorfar 98. Lantz, P
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88 Frey Table 1 Presence of the Var
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90 Frey 13. Lysis buffer: 100 mM Tr
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92 Frey as template for PCR. In add
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94 Frey strains, including all sero
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96 Frey
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98 Ewalt and Bricker (named for the
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100 Ewalt and Bricker 4. Ethidium b
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102 Ewalt and Bricker Primer Cockta
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104 Ewalt and Bricker Fig. 2. Typic
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106 Ewalt and Bricker with betaine
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108 Ewalt and Bricker unused ethidi
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110 Englen et al. which campylobact
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112 Englen et al. 18. Dehydrated cu
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114 Englen et al. 3.1.3. Fecal Samp
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116 Englen et al. respectively), an
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118 Englen et al. Fig. 1. Identific
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120 Englen et al. 3. Goossens, H.,
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122 Englen et al.
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124 Sachse and Hotzel Table 1 Compa
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126 Sachse and Hotzel Table 2 Prime
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128 Sachse and Hotzel 7. Phenol: sa
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130 Sachse and Hotzel 4. Vortex mix
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132 Sachse and Hotzel Fig. 2. Speci
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134 Sachse and Hotzel In the latter
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136 Sachse and Hotzel 17. Longbotto
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138 Popoff spastic paralysis. The g
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Table 3 Primers for Toxin Gene Dete
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142 Popoff 18. Agarose gel loading
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144 Popoff Taq reaction buffer 1X,
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146 Popoff almost all C. perfringen
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148 Popoff 2. Add to each PCR tube
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150 Popoff 7. Hielm, S., Hyyttia, E
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152 Popoff 35. Wieckowski, E., Bill
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154 Berri et al. 2. Materials 1. C.
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156 Berri et al. 3.3.2. Vaginal Swa
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158 Berri et al. Fig. 1. Trans-PCR.
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160 Berri et al. Fig. 3. Sensitivit
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162 Berri et al.
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164 Gallien The first description o
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166 Gallien
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168 Gallien 2. Materials 2.1. Bacte
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170 Gallien 10. Ethidium bromide: 1
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Table 2 Components (in µL) of 25-
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Table 4 Components (in µL) of 25-
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176 Gallien 3.3. Specific Isolation
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Table 6 PCR Conditions for Subtypin
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180 Gallien Fig. 3. Photographic im
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182 Gallien 3. Boyce, T. G., Swerdl
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184 Gallien enteropathogenic E. col
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186 O'Connor This chapter will desc
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188 O'Connor 2.2. PCR of Enriched F
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190 O'Connor 4. Notes 1. In enrichi
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192 O'Connor 4. O’Sullivan, N., F
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194 Lester and LeFebvre titers (4).
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196 Lester and LeFebvre 3.1.2. Samp
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Fig. 1. Sensitivity of the PCR assa
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200 Lester and LeFebvre 5. Swart, K
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202 Skuce et al. Table 1 Significan
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204 Skuce et al. commercial kits. E
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206 Skuce et al. Fig. 1. Schematic
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208 Skuce et al. 5. Disposable ster
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210 Skuce et al. 2.5.2. Sequence An
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212 Skuce et al. 2. Carefully trans
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Table 4 Recommended PCR Amplificati
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216 Skuce et al. Fig. 3. PCR produc
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218 Skuce et al. Fig. 5. Spoligotyp
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220 Skuce et al. 14. Aranaz, A., Li
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222 Skuce et al.
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224 Khan Simultaneous detection of
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226 Khan 10. Incubate for 20 min at
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228 Khan 5. Periodically, multiplex
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230 Khan
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232 Hotzel et al. tis (2). Particul
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234 Hotzel et al. 8. Sodium dodecyl
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236 Hotzel et al. 3. Methods 3.1. D
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238 Hotzel et al. 3.1.5. Semen (see
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240 Hotzel et al. Fig. 1 Detection
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242 Hotzel et al. 4. Notes 1. The u
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244 Hotzel et al. in Mycoplasma Pro
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246 Hotzel et al.
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248 Kobisch and Frey PCR assay to d
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250 Kobisch and Frey Table 1 Oligon
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252 Kobisch and Frey 3.2.1. Prepara
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254 Kobisch and Frey First round of
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256 Kobisch and Frey References 1.
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258 Christensen et al. thrombotic m
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260 Christensen et al. Table 1 Spec
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Table 2 Oligonucleotide Primers for
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264 Christensen et al. 3.2. Extract
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Table 3 PCR Protocols for the Patho
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268 Christensen et al. 2. Apply fra
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270 Christensen et al. 7. To reduce
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272 Christensen et al. 24. Fisher,
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274 Christensen et al. 54. Hunt, M.
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276 Malorny and Helmuth valent meta
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278 Malorny and Helmuth 12. Apparat
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280 Malorny and Helmuth 3.3. Amplif
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282 Malorny and Helmuth Table 2 Vol
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284 Malorny and Helmuth Table 4 PCR
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286 Malorny and Helmuth 3. Wallace,
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288 Malorny and Helmuth
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290 Wastling and Mattsson is an imp
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292 Wastling and Mattsson 2. Remove
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294 Wastling and Mattsson Fig. 1. B
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296 Wastling and Mattsson time PCR
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298 Wastling and Mattsson
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300 Pozio and La Rosa Table 1 Princ
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302 Pozio and La Rosa regions; spot
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304 Pozio and La Rosa 3. Proteinase
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306 Pozio and La Rosa Table 3 PCR-R
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308 Pozio and La Rosa 2. Pepsin sho
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310 Pozio and La Rosa
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312 Knutsson and Rådström The ref
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314 Knutsson and Rådström Fig. 1.
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316 Knutsson and Rådström 2.4. El
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318 Knutsson and Rådström the swa
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320 Knutsson and Rådström Fig. 3.
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322 Knutsson and Rådström 4. Alek
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324 Knutsson and Rådström 34. Hee
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PCR Detection of Microbial Pathogens PCR Detection of Microbial ...

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