Animal Waste, Water Quality and Human Health

More documents

Recommendations

Info

4Zoonotic waterbornepathogens in livestock and theirexcreta – interventionsVictor Gannon, Delia Grace andEdward R. Atwill4.1 INTRODUCTIONIn Chapter 3, the prevalence of zoonotic pathogens in animal populations wasdiscussed. In the present Chapter, methods used to reduce these zoonoticpathogens in animal populations and their waste products are presented.However, it must be borne in mind that farm-level interventions are rarelyprimarily aimed at reducing risks associated with waterborne disease in humans;most commonly the objective is to reduce foodborne zoonotic illness (caused bythe same pathogens) or to reduce production losses in domestic animals. In thecase of so-called “dual burden pathogens”, that is micro-organisms with major© 2012 World Health Organization (WHO). Animal Waste, Water Quality and Human Health. Editedby Al Dufour, Jamie Bartram, Robert Bos and Victor Gannon. ISBN: 9781780401232. Published byIWA Publishing, London, UK.
116Animal Waste, Water Quality and Human Healthdeleterious impacts on both human and animal populations, the objectives are toboth improve food safety and reduce production losses. A subsequent Chapterdiscusses some of the implications when effective control requires coordinationof multiple actors and where costs are borne by one actor but benefits accrue tomultiple actors, which may or may not include the actor investing in control.4.2 RISK-BASED APPROACHES AND THE RATIONALEFOR ANIMAL-BASED INTERVENTIONSRisk-based approaches provide a rationale for tackling waterborne zoonoses at thefarm level. A cornerstone of risk analysis is the concept of a “risk pathway” thattraces hazards from their source to the associated health outcome: pathscommonly referred to as gate to plate, farm to fork, boat to throat and, whenapplied to water treatment, source to tap (Hamilton et al. 2006). This impliesthat controlling hazards at source will have benefits all the way down therisk pathway, and, indeed, it has been suggested that the farm is often the bestplace to control food and waterborne pathogens (Hafez 1999). Figure 4.1 setsout points at which pathogens can be controlled as they move fromenvironment/other animals to infect farm animals, then establish infection in thegastrointestinal system (GIT) of livestock, and eventually are shed in excreta.These are considered in detail in the rest of the Chapter as four key controlpoints to ensure animal excreta are free from waterborne zoonoses.2. Block establishment:↑ host resistance1. Minimiseexposure3. Block establishment:GIT ecology/antimicrobials4. Eliminate from faecesFigure 4.1 Points at which pathogen load can be reduced in farm animals and their excreta.In keeping with the rest of the book, this chapter focuses on the five prioritywaterborne zoonoses identified in Chapter 2: Salmonella enterica, Escherichia
Page 1 and 2:
Emerging Issues in Water and Infect
Page 3 and 4:
World Health Organization and IWA P
Page 5 and 6:
Published on behalf of the World He
Page 7 and 8:
viAnimal Waste, Water Quality and H
Page 9 and 10:
viiiAnimal Waste, Water Quality and
Page 11 and 12:
xAnimal Waste, Water Quality and Hu
Page 13 and 14:
2Animal Waste, Water Quality and Hu
Page 15 and 16:
Page 17 and 18:
Page 19 and 20:
Page 21 and 22:
10Animal Waste, Water Quality and H
Page 23 and 24:
Page 25 and 26:
Page 27 and 28:
Page 29 and 30:
Page 31 and 32:
Page 33 and 34:
Page 35 and 36:
Page 37 and 38:
Page 39 and 40:
Page 41 and 42:
Page 43 and 44:
Page 45 and 46:
Page 47 and 48:
Page 49 and 50:
Page 51 and 52:
Page 53 and 54:
Page 55 and 56:
Page 57 and 58:
Page 59 and 60:
Page 61 and 62:
Page 63 and 64:
Page 65 and 66:
Page 67 and 68:
Page 69 and 70:
Page 71 and 72:
Page 73 and 74:
Page 75 and 76: 64Animal Waste, Water Quality and H
Page 84 and 85: 3Zoonotic waterborne pathogen loads
Page 86 and 87: Zoonotic waterborne pathogen loads
Page 100 and 101: the cause of a variety of food- and
Page 128 and 129: Zoonotic waterborne pathogens in li
Page 146 and 147: controlling E. coli-associated diar
Page 168 and 169: 5Transport of microbial pollution i
Page 170 and 171: Transport of microbial pollution in
Page 176 and 177:
Transport of microbial pollution in
Page 178 and 179:
Page 180 and 181:
Page 182 and 183:
Page 184 and 185:
Page 186 and 187:
Page 188 and 189:
Page 190 and 191:
Page 192 and 193:
Page 194 and 195:
Page 196 and 197:
Page 198 and 199:
Page 200 and 201:
Page 202 and 203:
Page 204:
Page 207 and 208:
196Animal Waste, Water Quality and
Page 209 and 210:
Page 211 and 212:
Page 213 and 214:
Page 215 and 216:
Page 217 and 218:
Page 219 and 220:
Page 221 and 222:
Page 223 and 224:
Page 225 and 226:
Page 227 and 228:
Page 229 and 230:
Page 231 and 232:
Page 233 and 234:
Page 235 and 236:
Page 237 and 238:
Page 239 and 240:
Page 241 and 242:
Page 243 and 244:
Page 245 and 246:
Page 247 and 248:
Page 249 and 250:
Page 251 and 252:
Page 253 and 254:
Page 255 and 256:
Page 257 and 258:
Page 259 and 260:
Page 261 and 262:
Page 263 and 264:
Page 265 and 266:
Page 268 and 269:
7ExposureWill Robertson and Gordon
Page 270 and 271:
Exposure 259main components influen
Page 272 and 273:
Exposure 261rainfall events (Atherh
Page 274 and 275:
Exposure 263contact activities, the
Page 276 and 277:
Exposure 265Table 7.1 Notable studi
Page 278 and 279:
Exposure 267Table 7.2 Notable studi
Page 280 and 281:
Exposure 269water than zoonotic pat
Page 282 and 283:
Exposure 2711999). As suggested by
Page 284 and 285:
Exposure 273leptospirosis is primar
Page 286 and 287:
are severely underreported. As with
Page 288 and 289:
Exposure 277duodenalis in surface w
Page 290 and 291:
Exposure 279Keeley, A. and Faulkner
Page 292:
Exposure 281Schultz-Fademrecht, C.,
Page 295 and 296:
Page 297 and 298:
Page 299 and 300:
Page 301 and 302:
Page 303 and 304:
Page 305 and 306:
Page 307 and 308:
Page 309 and 310:
Page 311 and 312:
Page 313 and 314:
Page 315 and 316:
Page 317 and 318:
Page 319 and 320:
Page 321 and 322:
Page 323 and 324:
Page 325 and 326:
Page 327 and 328:
Page 329 and 330:
Page 331 and 332:
Page 333 and 334:
Page 335 and 336:
Page 337 and 338:
Page 339 and 340:
Page 341 and 342:
Page 343 and 344:
Page 345 and 346:
Page 347 and 348:
Page 349 and 350:
Page 351 and 352:
Page 353 and 354:
Page 355 and 356:
Page 357 and 358:
Page 359 and 360:
Page 361 and 362:
Page 363 and 364:
Page 365 and 366:
Page 367 and 368:
Page 369 and 370:
Page 371 and 372:
Page 373 and 374:
Page 375 and 376:
Page 377 and 378:
Page 379 and 380:
Page 381 and 382:
Page 383 and 384:
Page 385 and 386:
Page 387 and 388:
Page 389 and 390:
Page 391 and 392:
Page 393 and 394:
Page 395 and 396:
Page 397 and 398:
Page 399 and 400:
Page 401 and 402:
Page 403 and 404:
Page 405 and 406:
Page 407 and 408:
Page 409 and 410:
Page 411 and 412:
Page 413 and 414:
Page 415 and 416:
Page 417 and 418:
Page 419 and 420:
Page 421 and 422:
Page 423 and 424:
Page 425 and 426:
Page 427 and 428:
Page 429 and 430:
Page 431 and 432:
Page 433 and 434:
Page 435 and 436:
Page 437 and 438:
Page 439 and 440:
Page 441 and 442:
Page 443 and 444:
Page 445 and 446:
Page 447 and 448:
Page 449 and 450:
Page 451 and 452:
Page 453 and 454:
Page 455 and 456:
Page 457 and 458:
Page 459 and 460:
Page 461 and 462:
Page 463 and 464:
Page 465 and 466:
Page 467 and 468:
Page 469 and 470:
Page 472 and 473:
IndexAgricultural runoff, 122, 168,
Page 474 and 475:
Index 463Biogas, 137-139, 291Bio-se
Page 476 and 477:
Index 465Critical control points, 1
Page 478 and 479:
Index 467290-291, 293, 295, 300, 30
Page 480 and 481:
Index 469Hazard detection, 285Hazar
Page 482 and 483:
Index 471pathogens, 2, 4-14, 17-21,
Page 484 and 485:
Index 473Probiotics, 132-133Protozo
Page 486 and 487:
Index 475Molecular, 16, 19, 22, 27,
show all

Animal Waste, Water Quality and Human Health

Create successful ePaper yourself

Delete template?

Save as template?