Spit and Snot

Spit and Snot
Name	Spit and Snot
Synonyms	Saliva and nasal mucus
Field	Medicine, Microbiology, Otolaryngology
Components	Mucins, water, electrolytes, enzymes, immune proteins
Related	Respiratory tract secretions, sputum, phlegm

Contents

Spit and Snot are colloquial pairings referring to oral saliva and nasal mucus, two biologically distinct secretions produced by separate anatomical sites with overlapping roles in protection, lubrication, and host defense. These secretions are studied across World Health Organization, Centers for Disease Control and Prevention, National Institutes of Health, Royal Society, and clinical institutions such as Mayo Clinic and Johns Hopkins Hospital for their diagnostic, immunological, and epidemiological importance. Research on saliva and nasal mucus informs work at laboratories including Roche Diagnostics, Abbott Laboratories, F. Hoffmann-La Roche AG, Wellcome Trust-funded centers, and university departments at Harvard Medical School, Stanford University School of Medicine, University of Oxford, University of Cambridge, and Karolinska Institutet.

Terminology and Composition

Saliva and nasal mucus are defined in clinical lexicons used by World Health Organization, American Medical Association, British Medical Association, European Respiratory Society, and textbooks from Oxford University Press and Elsevier; saliva originates from salivary glands such as the parotid gland, submandibular gland, and sublingual gland, whereas nasal mucus is secreted by goblet cells and submucosal glands lining the nasal cavity and paranasal sinuses. Major molecular constituents include mucins (e.g., MUC5B, MUC7), electrolytes measured by assays from Siemens Healthineers, enzymes such as amylase and lysozyme, and immunoglobulins including Immunoglobulin A and complement proteins characterized in work at Institut Pasteur and Max Planck Institute for Infection Biology. Proteomic and glycomic profiling techniques developed at Broad Institute, Wellcome Sanger Institute, and Cold Spring Harbor Laboratory reveal complex panels of peptides, lipids, and metabolites.

Secretion is regulated by neural circuits involving cranial nerves documented in neurology studies at National Institutes of Health Clinical Center, with parasympathetic stimulation via the facial nerve and glossopharyngeal nerve increasing salivary flow, and reflexes mediated through brainstem nuclei described in publications from Johns Hopkins University School of Medicine. Saliva facilitates digestion (initiating starch breakdown with salivary amylase), speech studied in labs at Massachusetts Institute of Technology, and oral homeostasis investigated by teams at University of California, San Francisco; nasal mucus traps particulates and pathogens and conditions inspired air for the lower respiratory tract per research at National Jewish Health and Karolinska Institutet. Both secretions contain antimicrobial peptides (defensins characterized at Scripps Research) and microbiota interactions analyzed in cohort studies from Imperial College London and University of Toronto.

Alterations in saliva and nasal mucus composition are linked to conditions treated at specialty centers like Mayo Clinic and Cleveland Clinic, including xerostomia associated with Sjögren's syndrome, radiation-induced salivary hypofunction managed in protocols from American Society for Radiation Oncology, chronic rhinosinusitis addressed by guidelines from European Rhinologic Society, and infectious diseases investigated during outbreaks at Centers for Disease Control and Prevention and World Health Organization. Diagnostic utility is used for detection of pathogens such as influenza viruses studied at Centers for Disease Control and Prevention Influenza Division, Severe acute respiratory syndrome coronavirus 2 panels validated at Walter Reed Army Institute of Research, and biomarkers for cancers explored by teams at Dana-Farber Cancer Institute and Memorial Sloan Kettering Cancer Center.

Attitudes toward expectoration and nasal mucus vary across societies examined by anthropologists at London School of Economics, University of Chicago, University of California, Berkeley, and cultural historians at Yale University; norms are codified in etiquette guides from Emily Post Institute and legal restrictions in public health ordinances enforced by municipal agencies like New York City Department of Health and Mental Hygiene. Artistic depictions appear in works cataloged by institutions such as the British Museum, Louvre Museum, and in literature from authors including Charles Dickens, Mark Twain, and James Joyce, while sociological research from Princeton University and Columbia University explores stigma, ritual, and media representation.

Saliva and nasal secretions serve as noninvasive specimens in diagnostics developed by companies like Cepheid, Thermo Fisher Scientific, and research consortia at Broad Institute and Scripps Research; methods include PCR protocols standardized by World Health Organization, antigen assays evaluated at European Centre for Disease Prevention and Control, and proteomic workflows from Mass Spectrometry Society collaborations. Sampling techniques range from swabs marketed by Copan Diagnostics to saliva collection devices from Salimetrics, with biosafety frameworks guided by Centers for Disease Control and Prevention and World Health Organization laboratory manuals. Biobanking initiatives at UK Biobank and Biobank Japan include curated saliva and nasal mucus repositories for longitudinal studies.

Guidance on respiratory secretion management is issued by World Health Organization, Centers for Disease Control and Prevention, and national health services such as the National Health Service (England), emphasizing respiratory etiquette promoted during pandemics by agencies including European Centre for Disease Prevention and Control and vaccination campaigns coordinated by Gavi, the Vaccine Alliance. Waste handling standards are informed by occupational safety bodies like Occupational Safety and Health Administration and infection control protocols from Association for Professionals in Infection Control and Epidemiology. Clinical interventions addressing overproduction or deficiency involve pharmaceuticals from firms like GlaxoSmithKline, Pfizer, and device development from Medtronic and Fisher & Paykel Healthcare.

Category:Body fluids