Bacterial Infections
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Bacterial Infections conditions
Acne Vulgaris (Cutibacterium acnes)Acne Vulgaris (Cutibacterium acnes) is a chronic inflammatory skin condition caused by Cutibacterium acnes colonization of hair follicles leading to comedones and pustules.Actinomycosis (Actinomyces israelii)Actinomycosis caused by Actinomyces israelii is a chronic bacterial infection characterized by abscesses, sinus tracts, and sulfur granules in affected tissues.Anaplasmosis (Anaplasma phagocytophilum)Anaplasmosis (Anaplasma phagocytophilum) is a tick-borne infection causing fever, headache, and leukopenia due to granulocyte infection by the Anaplasma bacterium.Anthrax (Bacillus anthracis)Anthrax caused by Bacillus anthracis is a spore-forming bacterium that produces lethal toxins leading to severe cutaneous, inhalational, or gastrointestinal disease.Antibiotic-Associated Colitis (Clostridioides difficile)Antibiotic-associated colitis caused by Clostridioides difficile involves toxin-mediated colonic inflammation following antibiotic use, often diagnosed by stool toxin assay.Atypical Pneumonia (Mycoplasma pneumoniae)Atypical pneumonia caused by Mycoplasma pneumoniae involves gradual onset of respiratory symptoms, dry cough, and interstitial infiltrates on chest imaging.Bacillary Dysentery (Shigella)Bacillary Dysentery (Shigella) is an infectious colitis caused by Shigella species, characterized by bloody diarrhea, abdominal cramps, and fever due to mucosal invasion.Bacterial Vaginosis (Gardnerella vaginalis)Bacterial Vaginosis (Gardnerella vaginalis) is a vaginal infection caused by an imbalance of normal flora, leading to discharge, odor, and clue cells on microscopy.Bartonellosis/Cat Scratch Disease (Bartonella henselae)Bartonellosis or Cat Scratch Disease caused by Bartonella henselae involves regional lymphadenopathy and fever following a cat scratch or bite.Botulism (Clostridium botulinum)Botulism (Clostridium botulinum) is a neuroparalytic illness caused by botulinum toxin leading to flaccid paralysis, diplopia, dysphagia, and respiratory failure.Brucellosis/Undulant Fever (Brucella species)Brucellosis or Undulant Fever is a bacterial infection caused by Brucella species, characterized by fever, sweats, malaise, and potential chronic joint pain.Bubonic Plague (Yersinia pestis)Bubonic plague caused by Yersinia pestis involves swollen lymph nodes, fever, and chills, transmitted by flea bites and diagnosed by identifying the bacterium.Burkholderia cepacia Infections in Cystic Fibrosis (Burkholderia cepacia)Burkholderia cepacia infections in cystic fibrosis cause rapid lung function decline and are notable for multidrug resistance complicating treatment.Campylobacter Gastroenteritis (Campylobacter jejuni)Campylobacter gastroenteritis caused by Campylobacter jejuni presents with bloody diarrhea and is often linked to poultry consumption and Guillain-Barré syndrome risk.Cervicofacial Actinomycosis (Actinomyces israelii)Cervicofacial Actinomycosis caused by Actinomyces israelii presents with chronic granulomatous infection and characteristic sulfur granules in draining sinuses.Cholera (Vibrio cholerae)Cholera (Vibrio cholerae) causes severe watery diarrhea through cholera toxin-induced chloride secretion, leading to rapid dehydration and electrolyte loss.Clostridial Food Poisoning (Clostridium perfringens)Clostridial Food Poisoning (Clostridium perfringens) causes acute diarrhea and abdominal cramps due to toxin production after ingestion of contaminated food.Colorectal Cancer Association (Streptococcus gallolyticus - S. bovis)Colorectal Cancer Association with Streptococcus gallolyticus involves bacterial infection linked to colorectal tumors and endocarditis, often detected by positive blood cultures.Dental Caries (Streptococcus mutans)Dental caries caused by Streptococcus mutans involves enamel demineralization from acid production leading to tooth decay and cavity formation.Diphtheria (Corynebacterium diphtheriae)Diphtheria caused by Corynebacterium diphtheriae is a bacterial infection marked by a pseudomembrane in the throat and potential toxin-mediated complications.Dysentery (Enteroinvasive Escherichia coli)Dysentery caused by enteroinvasive Escherichia coli involves invasive colon infection leading to bloody diarrhea, abdominal cramps, and fever with inflammatory stool findings.Ear Infection (Pseudomonas aeruginosa)Ear Infection caused by Pseudomonas aeruginosa involves bacterial inflammation of the ear, often presenting with pain, discharge, and possible hearing loss.Ehrlichiosis (Ehrlichia species)Ehrlichiosis (Ehrlichia species) is a tick-borne infection causing fever, headache, and leukopenia due to intracellular bacteria infecting white blood cells.Endocarditis (Enterococcus faecium/faecalis)Endocarditis caused by Enterococcus faecium/faecalis involves infection of heart valves, often linked to genitourinary procedures and shows variable antibiotic resistance.Endocarditis (Staphylococcus epidermidis)Endocarditis caused by Staphylococcus epidermidis involves infection of heart valves, often in prosthetic valves, presenting with fever and positive blood cultures.Endocarditis (Streptococcus gallolyticus - S. bovis)Endocarditis caused by Streptococcus gallolyticus (S. bovis) is linked to colon pathology and presents with subacute valve infection and positive blood cultures.Endocarditis (Streptococcus mitis)Endocarditis caused by Streptococcus mitis involves infection of heart valves, often linked to dental procedures and presents with subacute symptoms and positive blood cultures.Endocarditis (Streptococcus sanguinis)Endocarditis caused by Streptococcus sanguinis involves infection of heart valves, often linked to dental procedures and characterized by subacute symptoms.Epidemic Typhus (Rickettsia prowazekii)Epidemic typhus caused by Rickettsia prowazekii is a louse-borne infection presenting with fever, rash, headache, and can lead to severe systemic complications.Epiglottitis (Haemophilus influenzae type b - Hib)Epiglottitis caused by Haemophilus influenzae type b is a life-threatening airway obstruction in children marked by rapid onset fever and dysphagia.Eye Infection (Pseudomonas aeruginosa)Eye infection caused by Pseudomonas aeruginosa involves rapid corneal damage, purulent discharge, and is diagnosed by culture revealing gram-negative rods.Food Poisoning (Bacillus cereus)Food poisoning caused by Bacillus cereus involves toxin production leading to nausea, vomiting, or diarrhea typically after consuming contaminated rice or starchy foods.Gas Gangrene (Clostridium perfringens)Gas Gangrene caused by Clostridium perfringens is a rapidly progressing infection marked by muscle necrosis and gas production in soft tissues.Gastric Cancer (Helicobacter pylori)Gastric cancer linked to Helicobacter pylori infection involves chronic inflammation leading to mucosal damage and increased risk of intestinal-type adenocarcinoma.Gastric Ulcer (Helicobacter pylori)Gastric Ulcer caused by Helicobacter pylori involves mucosal damage from bacterial infection leading to epigastric pain and increased gastric acid secretion.Gastroenteritis (S. typhi)Gastroenteritis caused by Salmonella typhi presents with prolonged fever, abdominal pain, and rose spots, reflecting systemic infection and intestinal invasion.Gastroenteritis (Salmonella spp. except S. typhi)Gastroenteritis caused by non-typhi Salmonella species presents with diarrhea and abdominal cramps due to bacterial invasion of intestinal mucosa.Gonorrhea (Neisseria gonorrhoeae)Gonorrhea caused by Neisseria gonorrhoeae is a common STI characterized by purulent urethritis and diagnosed by gram-negative intracellular diplococci on smear.Guillain-Barré Syndrome (Campylobacter jejuni)Guillain-Barré Syndrome linked to Campylobacter jejuni involves acute demyelinating polyneuropathy triggered by immune response to bacterial infection.Hemolytic-Uremic Syndrome (Escherichia coli)Hemolytic-Uremic Syndrome caused by Escherichia coli involves microangiopathic hemolytic anemia, thrombocytopenia, and acute kidney injury after infection.Kidney Stones (Proteus mirabilis)Kidney stones caused by Proteus mirabilis involve struvite stone formation due to urease-producing bacteria leading to alkaline urine and recurrent urinary tract infections.Legionnaires' Disease (Legionella pneumophila)Legionnaires' Disease is a severe pneumonia caused by Legionella pneumophila, often linked to contaminated water sources and diagnosed by urinary antigen testing.Leprosy (Hansen's Disease) (Mycobacterium leprae)Leprosy (Hansen's disease) caused by Mycobacterium leprae is a chronic infection characterized by skin lesions and peripheral nerve damage leading to sensory loss.Leptospirosis (Leptospira species)Leptospirosis is a bacterial infection caused by Leptospira species, often transmitted via contaminated water and characterized by fever, myalgia, and jaundice.Listeriosis (Listeria monocytogenes)Listeriosis caused by Listeria monocytogenes is a foodborne infection notable for crossing the placental barrier, leading to neonatal meningitis and sepsis.Liver Abscess (Klebsiella pneumoniae)Liver abscess caused by Klebsiella pneumoniae involves pus-filled cavities in the liver, often presenting with fever, right upper quadrant pain, and elevated liver enzymes.Lyme Disease (Borrelia burgdorferi)Lyme Disease (Borrelia burgdorferi) is a tick-borne infection causing fever, rash, joint pain, and neurological symptoms due to Borrelia burgdorferi spirochete invasion.Lymphogranuloma Venereum (LGV) (Chlamydia trachomatis L1-L3)Lymphogranuloma Venereum (LGV) caused by Chlamydia trachomatis L1-L3 serovars presents with painless genital ulcers and painful inguinal lymphadenopathy.Malabsorption (Enteropathogenic Escherichia coli)Malabsorption caused by Enteropathogenic Escherichia coli involves intestinal damage leading to diarrhea and nutrient absorption defects, often diagnosed by stool culture.Meningitis (Haemophilus influenzae type b - Hib)Meningitis caused by Haemophilus influenzae type b (Hib) primarily affects children and is characterized by rapid onset of fever, neck stiffness, and altered mental status.Meningitis (Neisseria meningitidis)Meningitis caused by Neisseria meningitidis is a bacterial infection of the meninges presenting with fever, headache, neck stiffness, and purpura. Diagnosis involves CSF analysis.Meningitis (Streptococcus pneumoniae)Streptococcus pneumoniae meningitis is a bacterial infection causing inflammation of the meninges, often identified by a positive Gram stain and elevated CSF neutrophils.Meningococcemia (Neisseria meningitidis)Meningococcemia caused by Neisseria meningitidis is a severe bloodstream infection marked by rapid onset petechial rash and endotoxin-mediated shock.Murine Typhus (Rickettsia typhi)Murine typhus caused by Rickettsia typhi is a flea-borne infection presenting with fever, headache, rash, and mild lab abnormalities like elevated liver enzymes.Neonatal Conjunctivitis (Chlamydia trachomatis D-K)Neonatal conjunctivitis caused by Chlamydia trachomatis D-K presents with eyelid swelling and mucopurulent discharge, often appearing 5-14 days after birth.Neonatal Meningitis (Streptococcus agalactiae - Group B Streptococcus)Neonatal meningitis caused by Group B Streptococcus presents with fever and irritability, often diagnosed by positive CSF culture and elevated protein levels.Neonatal Pneumonia (Chlamydia trachomatis D-K)Neonatal pneumonia caused by Chlamydia trachomatis D-K presents with staccato cough and eosinophilia, often acquired during vaginal delivery in newborns.Nocardiosis (Pulmonary and Cutaneous Infections) (Nocardia species)Nocardiosis causes pulmonary and cutaneous infections by Nocardia species, characterized by filamentous bacteria and often diagnosed via acid-fast staining.Nosocomial Pneumonia (Serratia marcescens)Nosocomial pneumonia caused by Serratia marcescens is a hospital-acquired lung infection often linked to ventilator use and characterized by red pigment-producing bacteria.Otitis Media (Streptococcus pneumoniae)Otitis Media caused by Streptococcus pneumoniae often presents with middle ear effusion and tympanic membrane bulging due to bacterial infection.Pasteurellosis (Soft Tissue Infections) (Pasteurella multocida)Pasteurellosis soft tissue infections caused by Pasteurella multocida often follow animal bites, presenting rapid swelling and cellulitis requiring prompt treatment.Pediatric Diarrhea (Enteropathogenic E. coli)Pediatric diarrhea caused by enteropathogenic E. coli involves watery diarrhea in infants due to bacterial attachment and effacement of intestinal cells.Pelvic Inflammatory Disease (Neisseria gonorrhoeae)Pelvic Inflammatory Disease caused by Neisseria gonorrhoeae involves infection of the female upper reproductive tract, leading to pelvic pain, fever, and cervical motion tenderness.Pertussis (Whooping Cough) (Bordetella pertussis)Pertussis, caused by Bordetella pertussis, is a highly contagious respiratory infection marked by severe paroxysmal coughing and a characteristic whooping sound.Pharyngitis (Streptococcus pyogenes - Group A Streptococcus)Pharyngitis caused by Streptococcus pyogenes (Group A Streptococcus) involves sore throat, fever, tonsillar exudates, and tender cervical lymphadenopathy with positive rapid antigen test.Pneumonia (Haemophilus influenzae type b - Hib)Pneumonia caused by Haemophilus influenzae type b (Hib) primarily affects children and is characterized by encapsulated bacteria leading to severe respiratory infection.Pneumonia (Klebsiella pneumoniae)Pneumonia caused by Klebsiella pneumoniae involves severe lung infection with thick sputum, often in alcoholics or immunocompromised patients, diagnosed by sputum culture.Pneumonia (Pseudomonas aeruginosa)Pneumonia caused by Pseudomonas aeruginosa is a severe hospital-acquired infection often linked to ventilator use and resistant to multiple antibiotics.Pneumonia (Streptococcus pneumoniae)Pneumonia caused by Streptococcus pneumoniae involves bacterial infection of the lungs, leading to fever, productive cough, chest pain, and lobar consolidation on chest X-ray.Pneumonic Plague (Yersinia pestis)Pneumonic plague caused by Yersinia pestis is a severe lung infection marked by rapid respiratory failure and high mortality without prompt antibiotic treatment.Pontiac Fever (Legionella pneumophila)Pontiac Fever is a mild, flu-like illness caused by Legionella pneumophila, characterized by fever and muscle aches without pneumonia, often linked to contaminated water sources.Prosthetic Device Infection (Staphylococcus epidermidis)Prosthetic device infection caused by Staphylococcus epidermidis involves biofilm formation on implants leading to chronic inflammation and device failure.Psittacosis (Chlamydophila psittaci)Psittacosis caused by Chlamydophila psittaci is a zoonotic pneumonia linked to bird exposure, often presenting with fever, headache, and atypical chest X-ray findings.Reactive Arthritis (Campylobacter jejuni)Reactive Arthritis caused by Campylobacter jejuni is an autoimmune joint inflammation triggered by gastrointestinal infection, often presenting with asymmetric arthritis.Reactive Arthritis (Reiter Syndrome) (Chlamydia trachomatis D-K)Reactive arthritis (Reiter syndrome) caused by Chlamydia trachomatis D-K involves asymmetric arthritis, conjunctivitis, and urethritis following infection.Rheumatic Fever (Streptococcus pyogenes - Group A Streptococcus)Rheumatic Fever caused by Streptococcus pyogenes is an inflammatory disease following untreated strep throat, affecting heart, joints, skin, and brain with migratory arthritis and carditis.Rocky Mountain Spotted Fever (Rickettsia rickettsii)Rocky Mountain Spotted Fever (Rickettsia rickettsii) is a tick-borne illness causing fever, rash, and vasculitis due to endothelial infection by the bacterium.Scarlet Fever (Streptococcus pyogenes - Group A Streptococcus)Scarlet Fever (Streptococcus pyogenes - Group A Streptococcus) is a bacterial illness causing a characteristic red rash, sore throat, fever, and a strawberry tongue.Sepsis (Pseudomonas aeruginosa)Sepsis caused by Pseudomonas aeruginosa involves gram-negative bacteremia with endotoxin release leading to systemic inflammation and high mortality risk.Sepsis (Streptococcus agalactiae - Group B Streptococcus)Sepsis caused by Group B Streptococcus (Streptococcus agalactiae) often presents in neonates with rapid onset bacteremia and characteristic beta-hemolytic colonies.Skin and Soft Tissue Infection (Staphylococcus aureus)Staphylococcus aureus skin and soft tissue infections often present with localized abscesses and purulent drainage, highlighting the organism's role in pyogenic infections.Subacute Bacterial Endocarditis (Viridans group streptococci)Subacute bacterial endocarditis caused by Viridans group streptococci features gradual valve infection often linked to dental procedures and positive blood cultures.Syphilis (Treponema pallidum)Syphilis (Treponema pallidum) is a sexually transmitted infection caused by the spirochete bacterium Treponema pallidum, presenting with stages of ulcers, rash, and systemic symptoms.Tetanus (Clostridium tetani)Tetanus (Clostridium tetani) is a bacterial infection causing muscle rigidity and spasms due to neurotoxin release from Clostridium tetani spores entering wounds.Toxic Shock Syndrome (Staphylococcus aureus)Toxic Shock Syndrome caused by Staphylococcus aureus is a rapid-onset illness marked by fever, rash, hypotension, and multi-organ involvement due to toxin release.Trachoma (Chlamydia trachomatis A-C)Trachoma (Chlamydia trachomatis A-C) is a chronic infectious eye disease causing conjunctival inflammation and scarring, leading to blindness if untreated.Traveler's Diarrhea (Enterotoxigenic Escherichia coli)Traveler's diarrhea caused by enterotoxigenic Escherichia coli involves watery diarrhea due to heat-labile and heat-stable enterotoxins disrupting intestinal fluid balance.Tuberculosis (Mycobacterium tuberculosis)Tuberculosis (Mycobacterium tuberculosis) is a chronic infectious disease caused by Mycobacterium tuberculosis, primarily affecting the lungs and characterized by granuloma formation.Tularemia (Rabbit Fever) (Francisella tularensis)Tularemia, caused by Francisella tularensis, is a zoonotic infection often transmitted by rabbits and characterized by ulceroglandular lesions and fever.Typhoid Fever (Salmonella enterica serotype Typhi)Typhoid fever caused by Salmonella enterica serotype Typhi presents with sustained fever and abdominal symptoms due to bacterial invasion of Peyer patches.Urinary Tract Infection (Enterococcus faecium/faecalis)Urinary tract infection caused by Enterococcus faecium or faecalis often presents with dysuria and is notable for intrinsic resistance to many antibiotics.Urinary Tract Infection (Klebsiella pneumoniae)Urinary tract infection caused by Klebsiella pneumoniae often presents with mucoid colonies and is notable for its capsule-mediated resistance to phagocytosis.Urinary Tract Infection (Proteus mirabilis)Urinary Tract Infection caused by Proteus mirabilis involves bacterial invasion leading to dysuria, frequency, and alkaline urine with characteristic swarming motility on culture.Urinary Tract Infection (Serratia marcescens)Urinary tract infection caused by Serratia marcescens often presents with nosocomial risk factors and produces a red pigment, aiding in its identification.Urinary Tract Infection (Staphylococcus saprophyticus)Urinary Tract Infection caused by Staphylococcus saprophyticus involves bladder inflammation with symptoms like dysuria and frequency, often affecting young women.Urogenital Chlamydia Infection (Chlamydia trachomatis D-K)Urogenital Chlamydia Infection (Chlamydia trachomatis D-K) is a common STI causing urethritis and cervicitis, often diagnosed by nucleic acid amplification tests.Wound and Soft Tissue Infection (Pseudomonas aeruginosa)Wound and soft tissue infection caused by Pseudomonas aeruginosa involves painful inflammation, purulent discharge, and characteristic blue-green pigment production in infected tissues.Yersiniosis (Gastroenteritis - Yersinia enterocolitica)Yersiniosis gastroenteritis caused by Yersinia enterocolitica presents with fever, abdominal pain, and diarrhea, often mimicking appendicitis in young patients.Yersiniosis (Reactive Arthritis - Yersinia enterocolitica)Reactive arthritis triggered by Yersinia enterocolitica infection causes joint inflammation often following gastrointestinal symptoms in yersiniosis cases.