The time–temperature relationship for the inactivation of Ascaris eggs

Naidoo, Devashan; Foutch, Gary L.

doi:10.2166/washdev.2017.102

Cited by 7 publications

(1 citation statement)

References 25 publications

(14 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Increased temperatures have been found to be effective and cost efficient for inactivation of faecal-sludge pathogens (Podichetty et al 2014 ; Belcher et al 2015 ). This study is an extension of a short communication by Naidoo & Foutch ( 2017 ) and aimed to fill the knowledge gap with regards to the effects of short exposures of Ascaris eggs to heat. It was part of a larger project funded by the Bill and Melinda Gates Foundation (BMGF), which focused on development of a prototype viscous heater for sludge treatment by heat exposure.…”

Section: Introductionmentioning

confidence: 99%

The inactivation of Ascaris suum eggs by short exposure to high temperatures

Naidoo

Appleton

Archer

et al. 2018

Journal of Water, Sanitation and Hygiene for Development

Self Cite

View full text Add to dashboard Cite

Ascaris sp. is the most prominent and resilient helminth of human health importance found in faecal sludge, making Ascaris sp. an ideal index organism for inactivation testing. Heat treatment destroys helminths, allowing for safe handling and possible reuse of sludge. Technology development focuses on rapid heating to minimize equipment size and cost. This study evaluates Ascaris suum eggs' viability with short heating time. Ascaris eggs were placed in a water bath at temperatures from 60 to 80 °C for various exposure times (5 seconds to 4 minutes) and were immediately processed and analysed via light microscopy. For all samples within these temperature and time ranges, less than 10% viable eggs were recovered. For 70, 75 and 80 °C, complete inactivation was observed for exposure time of 5 seconds and above.

show abstract

Section: Introductionmentioning

confidence: 99%