Matthew Nonnenmann

Matthew Nonnenmann
University of Iowa | UI · Department of Occupational and Environmental Health

MS, Ph.D., CIH

About

58
Publications
10,759
Reads
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1,048
Citations
Citations since 2017
24 Research Items
658 Citations
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2017201820192020202120222023020406080100120140
2017201820192020202120222023020406080100120140
2017201820192020202120222023020406080100120140
Additional affiliations
July 2011 - April 2016
University of Iowa
Position
  • Professor (Assistant)
September 2007 - July 2011
University of Texas Health Science Center at Tyler
Position
  • Professor (Assistant)

Publications

Publications (58)
Article
Introduction: Resources on pesticide information are widely available; however, little is known about the concerns young agricultural workers have about pesticides, whether they use existing resources to find information about pesticides, and how these resources influence safety behaviors such as personal protective equipment (PPE) use. Objective...
Preprint
Full-text available
Dental practitioners may be at risk for exposure to Severe Acute Respiratory Syndrome Corona Virus 2 when performing aerosol generating procedures. Though recent evidence suggests that coronavirus may be transmitted through aerosol generating procedures, it is unknown whether common procedures performed in dental clinics generate aerosol. The aim o...
Article
Livestock workers experience an increased burden of bioaerosol-induced respiratory disease including high prevalence of rhinosinusitis. Dairy operations generate bioaerosols spanning the inhalable size fraction (0-100 μm) containing bacterial constituents such as endotoxin. Particles with an aerodynamic diameter between 10-100 μm are known to depos...
Article
Full-text available
Murine norovirus (MNV) was used as a surrogate for human viral pathogens (e.g., norovirus) to determine if toilet flushing resulted in the aerosolization of virus. A flushometer type toilet was seeded with a viral solution of 10⁵ and 10⁶ PFU mL⁻¹ of MNV and then flushed. Upon flushing, two bioaerosol samplers were activated to collect aerosolized M...
Article
Objective Agricultural cooperatives are formed to promote farmers’ economic, social, and legislative interests. Their role in influencing mental health is less known. We characterized farmers’ experiences with cooperatives and identified the potential impact of cooperatives in promoting mental health. Methods Semi-structured interviews were conduc...
Article
Full-text available
Air pollution particulate matter (PM) is associated with SARS-CoV-2 infection and severity, although mechanistic studies are lacking. We tested whether airway surface liquid (ASL) from primary human airway epithelial cells is antiviral against SARS-CoV-2 and 229E-CoV (responsible for common colds), and whether PM (urban, indoor (IAP), volcanic ash)...
Article
Full-text available
Farmers experience a high risk of stress, depression, and suicide. Risk factors are well documented but protective factors are seldom examined. Social support has been reported to reduce psychological distress among the general population but its effect on farmers is inconclusive. Agricultural cooperatives are typically created and owned by farmers...
Chapter
This chapter aims to address the information needs and to encourage the interests of industrial hygienists to apply their skills and knowledge to the population of workers employed in the industrial sectors of agriculture, forestry, and fishing (AFF). Worker health and safety efforts in these three sectors are often lumped together under the catego...
Article
Background Mycobacterium bovis (bTB) is a potential health hazard to dairy workers. This study uses the One Health wholistic framework for examining bovine tuberculosis (TB) and its relationship to human health. This approach can help bridge surveillance data gaps and contribute to disease control and prevention programs for dairy farm workers, cat...
Article
Full-text available
Globally, norovirus is the most common gastroenteritis causing pathogen. Annually, norovirus causes 685 million cases of acute gastroenteritis and 200,000 deaths, worldwide. Recent evidence has suggested that norovirus can also be spread via aerosolization; however, an indoor generation source has yet to be determined. We optimized a sampling metho...
Article
Full-text available
Background: One potential exposure on a dairy farm is Mycobacterium bovis or bovine tuberculosis (bTB)—an infectious zoonotic pathogen. The prevalence of tuberculosis among dairy workers in the U.S. is unknown largely due to insufficient surveillance and testing practices. Our objective was to determine the prevalence and risk factors of LTBI among...
Article
This article discusses several lessons learned in dealing with the interpretation of the Occupational Health and Safety Administration (OSHA) Voluntary Use provision of the Respiratory Health Standard at health-care facilities during the COVID-19 pandemic in the United States. This includes (but is not limited to) (a) confusion about OSHA policy an...
Article
Purpose: Dairy workers are at the frontline of exposure to bioaerosols, which typically contain bacteria and associated pro-inflammatory constituents (e.g., endotoxin). As such, dairy workers are at an increased risk for respiratory illness, most likely mediated through a strong proinflammatory response. Very few studies have systematically evaluat...
Article
Purpose: Livestock workers experience an increased burden of bioaerosol-induced respiratory disease. We have previously demonstrated that dairy operations generate bioaerosols spanning the inhalable size fraction. These aerosols contained complex bacterial communities and inflammagens. Because those particles with an aerodynamic diameter between 10...
Article
Objective To determine the knowledge of tuberculosis (TB) among dairy workers in Bailey County, Texas. Methods A cross-sectional study design was used to collect 225 survey responses concerning knowledge of TB among dairy workers on 10 dairy farms in Bailey County, Texas. Subjects used iPad tablets to log responses to 15 demographic questions and...
Article
Background Clostridioides difficile infection (CDI) is the most frequently reported hospital-acquired infection in the United States. Bioaerosols generated during toilet flushing are a possible mechanism for the spread of this pathogen in clinical settings. Objective To measure the bioaerosol concentration from toilets of patients with CDI before...
Article
Removal of teat-end debris is one of the most critical steps in the premilking process. We aimed to estimate inter- and intra-rater reliability of an observation-based rating scale of dairy parlor worker teat-cleaning performance. A nonrandom sample of 8 experienced raters provided teat swab debris ratings scored on a 4-point ordinal visual scale f...
Preprint
Full-text available
Quantification of aerosolized influenza virus is used for determining inhalation exposure. Several bioaerosol samplers and analytical methods have been used; however, the detection and quantification of influenza virus among aerosol samples remains challenging. Therefore, improved viral aerosol measurement methods are needed. This study evaluated i...
Article
Full-text available
Background In the United States, 1.7 million immunocompromised patients contract a healthcare-associated infection, annually. These infections increase morbidity, mortality and costs of care. A relatively unexplored route of transmission is the generation of bioaerosols during patient care. Transmission of pathogenic microorganisms may result from...
Article
Although agriculture in the US is now firmly rooted in scientific investigation, farmers were dismissive of agricultural science for many decades. Currently, there is a well-established body of scientific evidence related to occupational hazards on farms, as well as strategies to mediate them. However, rates of injuries and illness remain higher in...
Article
Background: Inhalation exposure to organic dust causes lung inflammation among agricultural workers. Due to changes in production and work organization, task-based inhalation exposure data, including novel lung inflammation biomarkers, will inform exposure recommendations for dairy farm workers. Methods: Linear regression was used to estimate th...
Article
Background: Large-herd dairy parlor workers experience a high prevalence of musculoskeletal symptoms in the upper extremity. The purpose of this study was to evaluate the effect of milking unit design on upper extremity muscle activity during milking unit attachment. Methods: Upper extremity muscle activity was recorded among U.S. large-herd par...
Article
Workers are exposed to dust in broiler chicken production during daily work activities. Poultry dust may contain inflammatory agents (e.g., endotoxin) and inhalation exposure has been associated with pulmonary symptoms. Current practice to reduce worker exposure to poultry dust is the use of respiratory protection (e.g., elastomeric face-piece resp...
Article
Background Dairy production in the U.S. is moving towards large-herd milking operations resulting in an increase in task specialization and work demands. Large-herd dairy parlor workers experience a high prevalence of musculoskeletal symptoms in the upper extremity. The purpose of this study is to evaluate the effects of an alternative teat scrubbe...
Article
U.S. large-herd dairy parlor workers experience a high prevalence of musculoskeletal symptoms in the upper extremity. The purpose of this study was to estimate and compare full-shift and task-specific muscle activity of the upper extremity among parlor workers. Surface EMG data was recorded continuously throughout a full work shift for each partici...
Article
Full-text available
Chronic inhalation exposure to agricultural dust promotes the development of chronic respiratory diseases among poultry workers. Poultry dust is composed of dander, chicken feed, litter bedding and microbes. However, the microbial composition and abundance has not been fully elucidated. Genomic DNA was extracted from settled dust and personal inhal...
Data
Table S1 Environmental and Chicken House Conditions at Time of Sampling. During litter sampling and mortality collection, personal exposure to inhalable dust was collected using a personal inhalable dust sampler at a flow rate of 4 L/min. Environmental and house conditions were recorded at time of sampling. Table S2 Genomic DNA quantity and tota...
Article
Background Dairy production in the United States is moving towards large-herd milking operations resulting in an increase in task specialization and work demands. The objective of this project was to provide preliminary evidence of the association of a number of specific job conditions that commonly characterize large-herd parlor milking operations...
Article
Objective: Noise is a hazard in commercial fishing. This cross-sectional study associates occupational noise exposure with hearing loss in commercial fishermen. Methods: A comprehensive survey and audiometric testing were administered to 227 participants in the Gulf Coast. Sound-level measurements were obtained aboard a sample of fishing vessels...
Article
Full-text available
The 2009 H1N1 pandemic emphasized a need to evaluate zoonotic transmission of influenza A in swine production. Airborne influenza A virus has been detected in swine facilities during an outbreak. However, the personal exposure of veterinarians treating infected swine has not been characterized. Two personal bioaerosol samplers, the NIOSH bioaerosol...
Article
Commercial fishing continues to have one of the highest rates of occupational fatalities compared with other work sectors in the United States. Attitudes/beliefs among Vietnamese shrimp fishermen of the Gulf of Mexico may influence behaviors that are risk factors for fatal and non-fatal injuries. The study employs a community trial with quasi-exper...
Article
Full-text available
Exposure to the agricultural work environment is a risk factor for the development of respiratory symptoms and chronic lung diseases. Inflammation is an important contributor to the pathogenesis of tissue injury and disease. Cellular and molecular mechanisms mediating lung inflammatory responses to agricultural dust are not yet fully understood. We...
Article
Full-text available
Exposure to the agricultural work environment is a risk factor for the development of respiratory symptoms and chronic lung diseases. Inflammation is an important contributor to the pathogenesis of tissue injury and disease. Cellular and molecular mechanisms mediating lung inflammatory responses to agricultural dust are not yet fully understood. We...
Article
Dairy production in the US is moving towards large-herd milking operations resulting in an increase in task specialization and work demands. A modified version of the Standardized Nordic Questionnaire was administered to assess MSS prevalence among 452 US large-herd parlor workers. Worker demographics and MSS prevalences were assessed, and differen...
Article
ABSTRACT Dairy farming is an ancient occupation. Traditionally, cows have been manually milked while tethered in stalls or stanchions. In the latter half of the 20th century as machine milking emerged, the parlor milking system has become more popular, especially among larger dairy farms. The transition from manual milking to automatic milking syst...
Article
Full-text available
ABSTRACT The dairy industry is changing on a global scale with larger, more efficient operations. The impact of this change on worker health and safety, specifically, associations between occupational lung disease and inhalation exposures, has yet to be reported in a comprehensive review of the scientific literature. Therefore, a three-tier process...
Article
Full-text available
ABSTRACT Agriculture is among the most hazardous sectors for workers globally, and dairy farming has been associated with a high risk of injury among workers in several countries. The purpose of this paper is to provide an update on what is known about modern dairy farms and related injuries and fatalities in different regions of the world. As in o...
Article
ABSTRACT The global dairy industry is composed of a multitude of countries with unique production practices and consumer markets. The global average number of cows per farm is about 1-2 cows; however, as a farm business model transitions from sustenance to market production, the average herd size, and subsequent labor force increases. Dairy product...
Article
Molecular techniques are an alternative to culturing and counting methods in quantifying indoor fungal contamination. Pyrosequencing offers the possibility of identifying unexpected indoor fungi. In this study, 50 house dust samples were collected from homes in the Yakima Valley, WA. Each sample was analyzed by quantitative PCR (QPCR) for 36 common...
Article
Over the last 20 years, the US dairy industry has experienced a significant transformation from small farm operations to an industrialization of the milking process. This transformation has resulted in improvements in process efficiency and product quality. Milking tasks in large-herd parlors are highly-repetitive involving awkward postures and hig...
Article
Commercial fishing continues to be a dangerous line of work. There are many hazards and the work is complex, even on a small scale. Along the United States Gulf Coast, the make-up of the commercial fishing population is diverse, with many Vietnamese shrimpers. Cultural barriers can interfere with critical communication and with receptivity to neces...
Article
Work in animal production facilities often results in exposure to organic dusts. Previous studies have documented decreases in pulmonary function and lung inflammation among workers exposed to organic dust in the poultry industry. Bacteria and fungi have been reported as components of the organic dust produced in poultry facilities. To date, little...
Article
The commercial fishing trades are among the most dangerous jobs in the world. Little published information exists regarding some populations of commercial fishermen such as along the United States Gulf Coast. Studying these unique and often vulnerable groups is important to characterize potential influences on or barriers to safety in anticipation...
Article
The prevalence of musculoskeletal symptoms (MSS) among crawfish farmers is unknown. The purpose of this study was to assess the prevalence of MSS in nine body regions among crawfish farmers, and to examine associations between MSS and crawfish farm work activities. Questionnaires were mailed to randomly selected crawfish farmers in the State of Lou...
Article
Musculoskeletal disorders are common among agricultural workers, particularly among dairy farm workers. Specifically, dairy farm workers have been identified as being at risk for knee osteoarthritis. Physical risk factors that may contribute to knee osteoarthritis include awkward postures of the knee, such as kneeling or squatting. The purpose of t...
Article
This paper summarizes two presentations and a panel discussion engaging health scientists, educators, and community outreach professionals who have drawn upon their experiences as researchers and agricultural workers to describe research challenges related to access, trust, language, culture, and participant benefit. These presentations and discuss...
Article
This paper presents a summary of a panel presentation by agriculture health and safety scientists on ergonomics of industrialized dairy parlor operations in the United States. Dairy industry trends in the United States were discussed in the panel presentation, which took place during the New Paths: Health and Safety in Western Agriculture conferenc...
Article
Full-text available
Occupational lung disease is a significant problem among agricultural workers exposed to organic dusts. Measurements of exposure in agricultural environments in the USA have traditionally been conducted using 37-mm closed-face cassettes (CFCs) and respirable Cyclones. Inhalable aerosol samplers offer significant improvement for dose estimation stud...
Article
The prevalence of musculoskeletal symptoms (MSS) among U.S. dairy farmers is relatively unknown. The purpose of this study was to assess the prevalence of neck and upper extremity MSS, and to examine associations between symptoms and dairy operation activities among dairy farmers. Questionnaires were mailed to randomly selected dairy farmers in the...
Article
The aim of this project was evaluate the effectiveness of an oil sprinkling system as a dust-reduction method for swine production facilities. This article presents the results of the second-year experiment of a multi-year study. The first-year experiment demonstrated that a 5% oil-water emulsion automatically applied at the rate of 3 and 5 g/pig/d...
Article
Full-text available
It is well documented in the international scientific literature that airborne dust in pig houses can cause serious health problems for humans as well as for animals. Extensive research has been carried out in different countries during the last few decades to improve the scientific understanding of air quality issues related to intensive animal pr...
Article
To determine the effect of glucocorticoids on grain dust-induced airflow obstruction and airway inflammation. Randomized controlled trial. University hospital. Health volunteers. Two randomized, placebo-controlled trials, each studying 10 healthy volunteers who were pretreated with either triamcinolone acetonide (Azmacort) oral inhaler 4 puffs twic...

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