Source: LINCOLN UNIVERSITY submitted to NRP
NOVEL ESCHERICHIA COLI GENETIC MARKERS FOR TRACKING FECAL POLLUTION OF AGRICULTURAL SOURCES IN WATER
Sponsoring Institution
National Institute of Food and Agriculture
Project Status
ACTIVE
Funding Source
Reporting Frequency
Annual
Accession No.
1031952
Grant No.
2024-38821-42059
Cumulative Award Amt.
$600,000.00
Proposal No.
2023-09143
Multistate No.
(N/A)
Project Start Date
Apr 1, 2024
Project End Date
Mar 31, 2027
Grant Year
2024
Program Code
[EQ]- Research Project
Recipient Organization
LINCOLN UNIVERSITY
820 CHESTNUT ST
JEFFERSON CITY,MO 651023537
Performing Department
(N/A)
Non Technical Summary
In recent years, we have experienced a substantial increase in demands from our stakeholders to assist in identifying the sources of Escherichia coli (E. coli) - the sources of fecal pollution - in both surface and groundwater. These demands have been driven by the needs for taking effective steps towards restoring water quality. To meet the needs of our stakeholders, we will enhance our capacities via this project through both research and extension activities. The research aims to develop new methods, eliminating the limitations of current methods, for accurately detecting E. coli originating from agricultural sources. The research team at Lincoln University (LU) have already achieved success in developing two methods for identifying E. coli of human origin. Building on this progress and collaborating with the Virginia State University (VSU), this project aims to further extend the research by developing approaches to detect E. coli of livestock origin. At the same time, the outreach activities are designed to enhance awareness and understanding among stakeholders about E. coli and fecal pollution. This endeavor will identify and clarify common public misconceptions about E. coli and fecal pollution through social media and summer workshops. This project is the partnership and collaborative efforts of two 1890 land-grant universities, multiple federal, state, and local agencies, and a network of volunteers in Missouri. The successful execution of this project will enhance the capabilities of all partner institutions in fecal source tracking, and thereby contributing to the overall improvement of water quality and public health.
Animal Health Component
45%
Research Effort Categories
Basic
10%
Applied
45%
Developmental
45%
Classification

Knowledge Area (KA)Subject of Investigation (SOI)Field of Science (FOS)Percent
1330210104040%
1330210110040%
1330210208020%
Goals / Objectives
The goal of this project is to reduce instances of human illness resulting from direct bodily contact (such as in recreational water activitiesor the ingestion of water, produce, and food contaminated by fecal matter. The goal is to be fulfilled through both research and extension activities:1. Research objective: To develop new methods for accurate detection of E. coli originating from agricultural sources, with a specific focus on those of cattle, pigs, and poultry. The objective will be achieved through comprehensive approaches of bioinformatics, molecular biology, and environmental microbiology, further validated by practical field tests.2. Extension objective: To enhance awareness and understanding among stakeholders about E. coli and fecal pollution. The objective will be realized through comprehensive outreach and education initiatives.
Project Methods
Primary methods to be used for research activities:1.in-silicon searching for potential genetic markersThis proposed project will capitalize on the extensive repository of whole-genome information for E. coli isolated from diverse countries and host species. This vast dataset is readily accessible through public databases like EnterBase and GenBank. Employing bioinformatics strategies such as comprehensive whole-genome comparisons and data mining, we will strive to identify potential host-specific DNA sequences (i.e. genetic markers) among the E. coli genomes.A minimum of 100 E. coli genomes (contigs or complete assemblies) each from human, cattle, pigs, chicken, turkey, and other livestock animals, if available, will be downloaded and subsequently subjected to gene recognition using GeneMarkS-2. This process will yield the gene composition for each genome. The resulting gene compositions will then undergo whole-genome comparisons to identify genes exclusive to a single host species, using BLAST or other suitable digital platforms. These unique genes are known as host-specific genetic markers.2.To develop polymerase chain reaction (PCR) assays for the detection of E. coli associated with livestock sourcesThe putative genetic markers identified in silico will be utilized to design PCR primers, and through PCR assays, we will determine thespecificities and sensitivities of the potential genetic markers in differentiating different sources ofE. colistrains isolated from at least 10 fecal samples each of at least 10 host species includingat least humans (from wastewater treatment plant), livestock (cattle, chicken, pig, and turkey), wild animals (deer and raccoon), and waterfowl (duck and goose). Thefecal sampleswill becollected from the states of Missouri and Virginia, and thePCR testswill be conducted intwo laboratories, at Lincoln Univesity and Viginia State University, toidentify reliable genetic markersthat are not geographically limited.Primary methods to be used for extension activities:We will strike toenhance awareness and understanding among stakeholders about fecal pollution to make informed decisions in allocations of funds and resourcesTo achieve theextension goal, the following methodologies will be used.1.A survey will be designed and then conducted among the stakeholders to identify any misconceptions about E. coli and fecal pollution and to understand the needs of the stakeholders.Although the public is generally aware of the health risk associated with fecal pollution, there are several misconceptions that are prevalent in the public perception. We will strivetoenhance awareness and understanding among stakeholders about fecal pollution to make informed decisions in allocations of funds and resources. To achieve theextension goal, the following methodologies will be used.1.Todesignand conductamong the stakeholders to identify any misconceptions aboutE. coliand fecal pollution and to understand the needs of the stakeholders.The survey will include the following issues, but not limited to: a. AllE. colistrains are harmful: This is one of the most common misconceptions. While some strains ofE. colican cause illness, many others are harmless and even beneficial. b. Lack of personal impact: Individuals may believe that fecal pollution is not relevant to their lives, thinking it only affects remote or rural areas. c. Clean appearance equals clean water: The misconception that clear water is always safe water can lead to underestimating the presence of fecal contamination in seemingly clean bodies of water. d. Blame on visible pollution: Visible waste or debris might be wrongly attributed as the main source of contamination, while invisible or dissolved pollutants are overlooked. e. Assumption of natural purity: Some individuals might believe that natural water bodies are inherently pure and immune to fecal contamination. f. Inadequate understanding of sources: Misidentifying sources of contamination, such as assuming that all animal waste originates from domestic pets rather than considering wildlife contributions.2. To develop research-based extension education materials and disseminate them to the stakeholders Based on the result of the survey mentioned above and existing knowledge ofE. coliand fecal pollution, research-based extension education materials will be developed and disseminated to thestakeholders. Three extension education modules will be developed to meet the needs of different stakeholders:Module 1: Clarification of common misconceptions ofE. coliand fecal pollution.Module 2:E. coli-based fecal source tracking methods, and their applications, advantages, and limitations.Module 3: Non-E. coli-based fecal source tracking methods and their applications, advantages, and limitations.

Progress 04/01/24 to 03/31/25

Outputs
Target Audience:At this early stage of research, our primary target audience is the water quality scientific community within the state of Missouri. We delivered two presentations at the 2025 annual meeting of the Missouri Academy of Science. Changes/Problems: Nothing Reported What opportunities for training and professional development has the project provided?During this reporting period, two female undergraduate students have been systematically trained in conventional microbiology and basic bioinformatics, and considerable hands-on experience has been provided to them. In addition, a female technician from Virginia State University received training in the application of polymerase chain reaction (PCR) techniques for fecal source tracking. How have the results been disseminated to communities of interest?The findings on the DNA sequences unique to human-origin E. coli and the genes associated with environmental E. coli were presented at the 2025 Annual Meeting of the Missouri Academy of Science. What do you plan to do during the next reporting period to accomplish the goals?During the next reporting period, the study will continue and be completed to evaluate the reliability of DNA sequences unique to human-origin and poultry-origin E. coli. Additionally, research will be conducted to identify DNA sequences specific to E. coli from additional major agricultural sources, such as pig and cattle farms.

Impacts
What was accomplished under these goals? The ability to identify the sources of fecal contamination in water is critically important for restoring water quality and ensuring food safety and public health. Escherichia coli (E. coli) bacteria are commonly used as indicators of fecal contamination. However, while elevated levels of E. coli signal the presence of fecal pollution, it is essential to determine the specific sources of contamination in order to effectively address and remediate the issue. During this reporting period, the following accomplishments were made: A total of 876 draft E. coli genome sequences from various host sources were identified and collected. These hosts include humans, cattle, pigs, poultry, and bats, with samples originating from diverse geographic locations such as Australia, China, Chile, Peru, and the United States. The data are believed to be a good representative of E. coli from different sources. Using bioinformatics approaches, unique "signature" DNA sequences have been identified for E. coli strains originating from humans and poultry, respectively. The specificity of these signature sequences is currently being evaluated using a panel of 1,000 E. coli strains isolated from a wide range of hosts, including humans, livestock (cattle, chicken, duck, goat, horse, pig, and sheep), and wild animals (deer, goose, raccoon, and seagull). A group of 24 genes were identified to be associated with environment-adopted E. coli

Publications

  • Type: Conference Papers and Presentations Status: Published Year Published: 2025 Citation: Hiba Al Hamami, Shanice Reid, Junling Zhao, Tumen Wuliji, and Guolu Zheng. Developing a polymerase chain reaction chain assay to detect Escherichia coli from human fecal sources. the 2025 Annual Meeting of the Missouri Academy of Science, Warrensburg, Missouri
  • Type: Conference Papers and Presentations Status: Published Year Published: 2025 Citation: Shanice Reid, Hiba Al Hamami, Junling Zhao, Tumen Wuliji, and Guolu Zheng. Genes associated with the survival of Escherichia coli in surface water. the 2025 Annual Meeting of the Missouri Academy of Science, Warrensburg, Missouri