Exposure and risk assessment of Salmonella in recycled residuals

Charles P Gerba, Nohelia Castro-del Campo, John P. Brooks, Ian L Pepper

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

The potential health effects of Salmonella found in wastewater residuals is dependent on the exposure of individuals to the organism. This paper provides a risk assessment for human infection from Salmonella due to direct contact with Class B biosolids, and from contact with Class A biosolids following regrowth of Salmonella. In addition, a risk assessment is provided for infection via airborne transport of bioaerosols from Class B biosolids and biosolids in which regrowth had occurred, to off-site communities. Results of the risk characterization imply that the risk of human infection from direct contact with Class B land applied residuals and subsequent ingestion is low. In contrast, the risk from direct contact with Class A residuals following regrowth is greater. Risks from airborne transport of Salmonella via bioaerosols away from a Class B land application site are also low. However, once again the risk from aerosols resulting from biosolids in which regrowth had occurred was greater. Based on these analyses, we conclude that it is highly unlikely that Salmonella infections will occur from land applied Class A or B residuals. However, risks become significant if Class A biosolids are stored anaerobically i.e. saturated, prior to land application.

Original languageEnglish (US)
Pages (from-to)1061-1065
Number of pages5
JournalWater Science and Technology
Volume57
Issue number7
DOIs
StatePublished - 2008

Fingerprint

Biosolids
Salmonella
biosolid
Risk assessment
risk assessment
regrowth
Aerosols
exposure
salmonella
Wastewater
Health
aerosol
wastewater
land
infection

Keywords

  • Class B biosolids
  • Land application
  • Regrowth
  • Residuals
  • Risk assessment
  • Salmonella
  • Storage

ASJC Scopus subject areas

  • Water Science and Technology

Cite this

Exposure and risk assessment of Salmonella in recycled residuals. / Gerba, Charles P; Castro-del Campo, Nohelia; Brooks, John P.; Pepper, Ian L.

In: Water Science and Technology, Vol. 57, No. 7, 2008, p. 1061-1065.

Research output: Contribution to journalArticle

Gerba, Charles P ; Castro-del Campo, Nohelia ; Brooks, John P. ; Pepper, Ian L. / Exposure and risk assessment of Salmonella in recycled residuals. In: Water Science and Technology. 2008 ; Vol. 57, No. 7. pp. 1061-1065.
@article{6a6b1f569f044b9688400896ef006960,
title = "Exposure and risk assessment of Salmonella in recycled residuals",
abstract = "The potential health effects of Salmonella found in wastewater residuals is dependent on the exposure of individuals to the organism. This paper provides a risk assessment for human infection from Salmonella due to direct contact with Class B biosolids, and from contact with Class A biosolids following regrowth of Salmonella. In addition, a risk assessment is provided for infection via airborne transport of bioaerosols from Class B biosolids and biosolids in which regrowth had occurred, to off-site communities. Results of the risk characterization imply that the risk of human infection from direct contact with Class B land applied residuals and subsequent ingestion is low. In contrast, the risk from direct contact with Class A residuals following regrowth is greater. Risks from airborne transport of Salmonella via bioaerosols away from a Class B land application site are also low. However, once again the risk from aerosols resulting from biosolids in which regrowth had occurred was greater. Based on these analyses, we conclude that it is highly unlikely that Salmonella infections will occur from land applied Class A or B residuals. However, risks become significant if Class A biosolids are stored anaerobically i.e. saturated, prior to land application.",
keywords = "Class B biosolids, Land application, Regrowth, Residuals, Risk assessment, Salmonella, Storage",
author = "Gerba, {Charles P} and {Castro-del Campo}, Nohelia and Brooks, {John P.} and Pepper, {Ian L}",
year = "2008",
doi = "10.2166/wst.2008.235",
language = "English (US)",
volume = "57",
pages = "1061--1065",
journal = "Water Science and Technology",
issn = "0273-1223",
publisher = "IWA Publishing",
number = "7",

}

TY - JOUR

T1 - Exposure and risk assessment of Salmonella in recycled residuals

AU - Gerba, Charles P

AU - Castro-del Campo, Nohelia

AU - Brooks, John P.

AU - Pepper, Ian L

PY - 2008

Y1 - 2008

N2 - The potential health effects of Salmonella found in wastewater residuals is dependent on the exposure of individuals to the organism. This paper provides a risk assessment for human infection from Salmonella due to direct contact with Class B biosolids, and from contact with Class A biosolids following regrowth of Salmonella. In addition, a risk assessment is provided for infection via airborne transport of bioaerosols from Class B biosolids and biosolids in which regrowth had occurred, to off-site communities. Results of the risk characterization imply that the risk of human infection from direct contact with Class B land applied residuals and subsequent ingestion is low. In contrast, the risk from direct contact with Class A residuals following regrowth is greater. Risks from airborne transport of Salmonella via bioaerosols away from a Class B land application site are also low. However, once again the risk from aerosols resulting from biosolids in which regrowth had occurred was greater. Based on these analyses, we conclude that it is highly unlikely that Salmonella infections will occur from land applied Class A or B residuals. However, risks become significant if Class A biosolids are stored anaerobically i.e. saturated, prior to land application.

AB - The potential health effects of Salmonella found in wastewater residuals is dependent on the exposure of individuals to the organism. This paper provides a risk assessment for human infection from Salmonella due to direct contact with Class B biosolids, and from contact with Class A biosolids following regrowth of Salmonella. In addition, a risk assessment is provided for infection via airborne transport of bioaerosols from Class B biosolids and biosolids in which regrowth had occurred, to off-site communities. Results of the risk characterization imply that the risk of human infection from direct contact with Class B land applied residuals and subsequent ingestion is low. In contrast, the risk from direct contact with Class A residuals following regrowth is greater. Risks from airborne transport of Salmonella via bioaerosols away from a Class B land application site are also low. However, once again the risk from aerosols resulting from biosolids in which regrowth had occurred was greater. Based on these analyses, we conclude that it is highly unlikely that Salmonella infections will occur from land applied Class A or B residuals. However, risks become significant if Class A biosolids are stored anaerobically i.e. saturated, prior to land application.

KW - Class B biosolids

KW - Land application

KW - Regrowth

KW - Residuals

KW - Risk assessment

KW - Salmonella

KW - Storage

UR - http://www.scopus.com/inward/record.url?scp=43949133358&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=43949133358&partnerID=8YFLogxK

U2 - 10.2166/wst.2008.235

DO - 10.2166/wst.2008.235

M3 - Article

C2 - 18441433

AN - SCOPUS:43949133358

VL - 57

SP - 1061

EP - 1065

JO - Water Science and Technology

JF - Water Science and Technology

SN - 0273-1223

IS - 7

ER -