සහාය
නොමිලේ බාගත කිරීම සහ තොරතුරු වේදිකාව

රෝගකාරක බැක්ටීරියා එසේත් නැත්නම් ව්‍යාධිජනක බැක්ටීරියා (ඉංග්‍රීසි:  Pathogenic bacteria) යනු රෝග ඇති කළ හැකි බැක්ටීරියා වෙයි. මෙම ලිපිය මිනිසුන් හට රෝගා සාදන බැ

ව්‍යාධිජනක බැක්ටීරියා

විකිපීඩියා වෙතින්
Pathogenic bacteria
Neisseria gonorrhoeae (small red dots) in pus from a man with a urethral discharge (Gram stain)

රෝගකාරක බැක්ටීරියා එසේත් නැත්නම් ව්‍යාධිජනක බැක්ටීරියා (ඉංග්‍රීසි:  Pathogenic bacteria) යනු රෝග ඇති කළ හැකි බැක්ටීරියා වෙයි. මෙම ලිපිය මිනිසුන් හට රෝගා සාදන බැක්ටීරියා පිළිබඳව ය. බොහෝ බැක්ටීරියා විශේෂ, හානිකර නොවන අතර බොහෝ විට වැඩදායක වන නමුත් අනෙක් ඒවා බෝවන රෝග ඇති කළ හැක. මිනිසාට හානිදායක බැක්ටීරියා විශේෂ ගණන සියයකට වඩා අඩු යැයි ඇස්තමේන්තුකර ඇත. එසේ වන්නේ, ආහාර මාර්ගය තුළ පමණක් බැක්ටීරියා විශේෂ දහස් ගණන් වාසය කරන්නේ යැයි සැළකෙන අතර ය.[තහවුරු කර නොමැත]

List of genera and microscopy features

Many genera contain pathogenic bacterial species. They often possess characteristics that help to classify and organize them into groups. The following is a partial listing.

Genus Species Gram staining Shape Oxygen requirement Intra/Extracellular
Bacillus
  • Bacillus anthracis
  • Bacillus cereus
Positive Rods Facultative anaerobic Extracellular
Bartonella
  • Bartonella henselae
  • Bartonella quintana
Negative Rods Aerobic Facultative intracellular
Bordetella
  • Bordetella pertussis
Negative Small coccobacilli Aerobic Extracellular
Borrelia
  • Borrelia burgdorferi
  • Borrelia garinii
  • Borrelia afzelii
  • Borrelia recurrentis
Negative, stains poorly Spirochete Anaerobic Extracellular
Brucella
  • Brucella abortus
  • Brucella canis
  • Brucella melitensis
  • Brucella suis
Negative Coccobacilli Aerobic Intracellular
Campylobacter
  • Campylobacter jejuni
Negative Spiral rods
coccoid in older cultures
Microaerophilic Extracellular
Chlamydia and Chlamydophila
  • Chlamydia pneumoniae
  • Chlamydia trachomatis
  • Chlamydophila psittaci
(not Gram-stained) Small, round, ovoid Facultative or strictly aerobic Obligate intracellular
Clostridium
  • Clostridium botulinum
  • Clostridium difficile
  • Clostridium perfringens
  • Clostridium tetani
Positive Large, blunt-ended rods Obligate anaerobic Extracellular
Corynebacterium
  • Corynebacterium diphtheriae
Positive (unevenly) Rods Mostly facultative anaerobic Extracellular
Enterococcus
  • Enterococcus faecalis
  • Enterococcus faecium
Positive Cocci Facultative Anaerobic Extracellular
Escherichia Negative Rods Facultative anaerobic Extracellular or Intracellular
Francisella
  • Francisella tularensis
Negative Coccobacillus Strictly aerobic Facultative intracellular
Haemophilus
  • Haemophilus influenzae
Negative Coccobacilli to long and slender filaments Facultative anaerobic 5 - 10% CO2 Extracellular
Helicobacter
  • Helicobacter pylori
Negative Spiral rod Microaerophile Extracellular
Legionella
  • Legionella pneumophila
Negative, stains poorly Cocobacilli Aerobic Facultative intracellular
Leptospira
  • Leptospira interrogans
  • Leptospira santarosai
  • Leptospira weilii
  • Leptospira noguchii
Negative, stains poorly Spirochete Strictly aerobic Extracellular
Listeria
  • Listeria monocytogenes
Positive, darkly Slender, short rods Facultative Anaerobic Facultative intracellular
Mycobacterium
  • Mycobacterium leprae
  • Mycobacterium tuberculosis
  • Mycobacterium ulcerans
(none) Long, slender rods Aerobic Intracellular
Mycoplasma
  • Mycoplasma pneumoniae
(none) Indistinct 'fried egg' appearance, no cell wall Mostly facultative anaerobic; M. pneumoniae strictly aerobic Extracellular
Neisseria
  • Neisseria gonorrhoeae
  • Neisseria meningitidis
Negative Kidney bean-shaped Aerobic Gonococcus: facultative intracellular
N. meningitidis
: extracellular
Pseudomonas
  • Pseudomonas aeruginosa
Negative Rods Obligate aerobic Extracellular
Rickettsia
  • Rickettsia rickettsii
Negative, stains poorly Small, rod-like coccobacillary Aerobic Obligate intracellular
Salmonella
  • Salmonella typhi
  • Salmonella typhimurium
Negative Rods Facultative anaerobica Facultative intracellular
Shigella
  • Shigella sonnei
Negative Rods Facultative anaerobic Extracellular
Staphylococcus
  • Staphylococcus aureus
  • Staphylococcus epidermidis
  • Staphylococcus saprophyticus
Positive, darkly Round cocci Facultative anaerobic Extracellular, facultative intracellular
Streptococcus
  • Streptococcus agalactiae
  • Streptococcus pneumoniae
  • Streptococcus pyogenes
Positive Ovoid to spherical Facultative anaerobic Extracellular
Treponema
  • Treponema pallidum
Negative, stains poorly Spirochete Aerobic Extracellular
Ureaplasma
  • Ureaplasma urealyticum
Stains poorly Indistinct, 'fried egg' appearance, no cell wall Anaerobic Extracellular
Vibrio
  • Vibrio cholerae
Negative Spiral with single polar flagellum Facultative anaerobic Extracellular
Yersinia
  • Yersinia pestis
  • Yersinia enterocolitica
  • Yersinia pseudotuberculosis
Negative, bipolarly Small rods Facultative anaerobe Intracellular

List of species and clinical characteristics

This is description of the more common genera and species presented with their clinical characteristics and treatments.

Species of human pathogenic bacteria
Species Transmission Diseases Treatment Prevention
Actinomyces israelii Oral flora Actinomycosis: painful abscesses and cysts MRSA in the mouth, lungs, or gastrointestinal tract. Prolonged penicillin G and drainage
Bacillus anthracis

Contact with cattle, sheep, goats and horses
Spores enter through inhalation or through abrasions

Anthrax: pulmonary, gastrointestinal and/or cutaneous symptoms.

In early infection:

Penicillin
Doxycycline
Ciprofloxacin
Raxibacumab

Anthrax vaccine
Autoclaving of equipment

Bacteroides fragilis Gut flora Abscesses in gastrointestinal tract, pelvic cavity and lungs metronidazole Wound care

Aspiration prevention

Bordetella pertussis

Contact with respiratory droplets expelled by infected human hosts.

Whooping cough
Secondary bacterial pneumonia

Macrolides such as erythromycin, before paroxysmal stage

Pertussis vaccine, such as in DPT vaccine

Borrelia B. burgdorferi

B. garinii
B. afzelii

Ixodes hard ticks
Reservoir in mice, other small mammals, and birds

Lyme disease

  • Early localized: erythema migrans
  • Early disseminated: neuroborreliosis, Lyme carditis
  • Late: Lyme arthritis, Achrodermatitis chronica (B. afzelii only)

Doxycycline for adults, amoxicillin for children, ceftriaxone for neurological involvement

Wearing clothing that limits skin exposure to ticks.
Insect repellent.
Avoid areas where ticks are found.

B. recurrentis

and others

Pediculus humanus corporis body louse (B. recurrentis only) and Ornithodoros soft ticks Relapsing fever Penicillin, tetracycline, doxycycline Avoid areas where ticks are found

Better access to washing facilities
Reduce crowding
Pesticides

Brucella B. abortus

B. canis
B. melitensis
B. suis

Direct contact with infected animal
Oral, by ingestion of unpasteurized milk or milk products

Brucellosis: mainly fever, muscular pain and night sweats

doxycycline
streptomycin
or gentamicin

Campylobacter jejuni

Fecal–oral from animals (mammals and fowl)
Uncooked meat (especially poultry)
Contaminated water

  • Enteritis,bloody diarrhea
  • Guillain–Barré syndrome (muscle weakness)

Treat symptoms
Fluoroquinolone such as ciprofloxacin in severe cases

Good hygiene
Avoiding contaminated water
Pasteurizing milk and milk products
Cooking meat (especially poultry)

Chlamydia C. pneumoniae

Respiratory droplets

Atypical pneumonia

Doxycycline
Erythromycin

None
C. trachomatis

vaginal sex
oral sex
anal sex Vertical from mother to newborn(ICN)
Direct or contaminated surfaces and flies (trachoma)

Trachoma
Neonatal conjunctivitis
Neonatal pneumonia
Nongonococcal urethritis (NGU)
Urethritis
Pelvic inflammatory disease
Epididymitis
Prostatitis
Lymphogranuloma venereum (LGV)

Erythromycin
(adults)Doxycycline
(infants and pregnant women)

Erythromycin or silver nitrate in newborn's eyes
Safe sex
Abstinence

Chlamydophila psittaci Inhalation of dust with secretions or feces from birds (e.g. parrots) Psittacosis, mainly atypical pneumonia

Tetracycline
Doxycycline
Erythromycin

-
Clostridium C. botulinum Spores from soil, persevere in canned food, smoked fish and honey

Botulism: Mainly muscle weakness and paralysis

Antitoxin
Penicillin
Hyperbaric oxygen
Mechanical ventilation

Proper food preservation techniques

C. difficile

Gut flora, overgrowing when other flora is depleted

Pseudomembranous colitis

Discontinuing responsible antibiotic
Vancomycin or metronidazole if severe

Fecal bacteriotherapy
C. perfringens

Spores in soil
Vaginal flora and gut flora

Anaerobic cellulitis
Gas gangrene Acute food poisoning

Gas gangrene:

Debridement or amputation
Hyperbaric medicine
High doses of doxycycline or penicillin G and clindamycin
Food poisoning: Supportive care is sufficient

Appropriate food handling
C. tetani

Spores in soil, skin penetration through wounds

Tetanus: muscle spasms

Tetanus immune globulin Sedatives
Muscle relaxants
Mechanical ventilation
Penicillin or metronidazole

Tetanus vaccine (such as in the DPT vaccine)

Corynebacterium diphtheriae

respiratory droplets
part of human flora

Diphtheria: Fever, sore throat and neck swelling, potentially narrowing airways.

Horse serum antitoxin
Erythromycin
Penicillin

DPT vaccine

Ehrlichia E. canis

E. chaffeensis

Dog tick Ehrlichiosis:headache, muscle aches, and fatigue
  • doxycycline
  • rifampin
Enterococcus E. faecalis

E. faecium

Part of gut flora,opportunistic or entering through GI tract or urinary system wounds

Bacterial endocarditis,biliary tract infections,urinary tract infections

Ampicillin (combined with aminoglycoside in endocarditis)Vancomycin

No vaccine Hand washing and other nosocomial prevention

Escherichia E. coli (generally)
  • Gut flora, and in urinary tract
  • Spreading extraintestinally or proliferating in the GI tract
  • Diarrhea
  • Urinary tract infections (UTI)
  • Meningitis in infants
  • Hospital-acquired pneumonia
  • Hospital-acquired sepsis
UTI:

(resistance-tests are required first)

  • Co-trimoxazole
  • Fluoroquinolone, e.g. ciprofloxacin

Meningitis:

  • Cephalosporin (e.g. cefotaxime) and gentamicin combination

Diarrhea:

  • Antibiotics above shorten duration
  • Electrolyte and fluid replacement
(no vaccine or preventive drug)
  • Cooking ground beef and pasteurizing milk against O157:H7
  • Hand washing and disinfection
Enterotoxigenic E. coli (ETEC)
  • Fecal–oral through food and water
  • Direct physical contact
  • Traveller's diarrhea
Enteropathogenic E. coli
  • Vertical, in utero or at birth
  • Diarrhea in infants
Enteroinvasive E.coli (EIEC)
  • Fecal–oral
  • bloody diarrhea and fever
Enterohemorrhagic (EHEC), including E. coli O157:H7
  • Reservoir in cattle
  • bloody diarrhea
  • Hemolytic-uremic syndrome
Francisella tularensis
  • vector-borne by arthropods
  • Infected wild or domestic animals, birds or house pets
Tularemia: Fever, ulceration at entry site and/or lymphadenopathy. Can cause severe pneumonia.
  • Streptomycin
  • Gentamicin
  • Avoiding insect vectors
  • Precautions when handling wild animals or animal products
Haemophilus influenzae
  • Droplet contact
  • Human flora of e.g. upper respiratory tract
  • Bacterial meningitis
  • Upper respiratory tract infections
  • Pneumonia,bronchitis
  • Septic arthritis in infants
Meningitis:

(resistance-tests are required first)

  • Third generation cephalosporin, e.g. cefotaxime or ceftriaxone
  • Ampicillin and sulbactam combination
  • Hib vaccine to infants
  • Rifampin prophylactically
Helicobacter pylori
  • Colonizing stomach
  • Unclear person-to-person transmission
  • Peptic ulcer
  • Chronic gastritis
  • Risk factor for gastric carcinoma and gastric B-cell lymphoma
  • Tetracycline, metronidazole and bismuth salt combination
(No vaccine or preventive drug)
Klebsiella pneumoniae
  • Mouth, skin, and gut flora.
  • Pneumonia upon aspiration
  • Klebsiella pneumonia, with significant lung necrosis and hemoptysis
  • Hospital-acquired urinary tract infection and sepsis
  • 3rd generation cephalosporin
  • ciprofloxacin
  • hand hygiene.
Legionella pneumophila
  • Droplet contact, from e.g. cooling towers,humidifiers, air conditioners and water distribution systems
  • Legionnaire's Disease
  • Pontiac fever
  • Macrolides, such as erythromycin
  • Fluoroquinolones
  • Rifampin
(no vaccine or preventive drug)

Heating water

Leptospira species
  • Food and water contaminated by urine from infected wild or domestic animals. Leptospira survives for weeks in fresh water and moist soil.
  • Leptospirosis: Headaches, muscle pains, and fevers; possible jaundice, kidney failure, pulmonary hemorrhage, and meningitis.
  • Doxycycline for mild cases
  • Intravenous penicillin for severe cases
Vaccine not widely used
  • Doxycycline

Prevention of exposure

  • Rodent control
Listeria monocytogenes
  • Raw milk or cheese, ground meats, poultry
  • Vertically to newborn or fetus
  • Listeriosis:
  • Meningitis
  • Sepsis
  • Ampicillin
  • Co-trimoxazole
(no vaccine)
  • Proper food preparation and handling
Mycobacterium M. leprae
  • Prolonged human-human contact, e.g. through exudates from skin lesions to abrasion of other person
  • Leprosy (Hansen's disease):granulomas of the nerves, respiratory tract, skin, and eyes.
Tuberculoid form:
  • Dapsone and rifampin

Lepromatous form:

  • Clofazimine
  • BCG vaccine shows some effects
M. tuberculosis
  • Droplet contact
  • Tuberculosis: chronic cough with blood-containing sputum, fever, night sweats, and weight loss

(difficult, see Tuberculosis treatment for more details)

Standard "short" course:

  • First 2 months, combination:
    • Isoniazid
    • Rifampicin
    • Pyrazinamide
    • Ethambutol
  • Further 4 months, combination:
    • Isoniazid
    • Rifampicin
  • BCG vaccine
  • Isoniazid
Mycoplasma pneumoniae
  • Human flora
  • Respiratory droplets
  • Mycoplasma pneumonia
  • Doxycycline and erythromycin
Neisseria N. gonorrhoeae
  • Sexually transmitted
  • vertical in birth
  • Gonorrhea
  • Urethritis (men)
  • Pelvic inflammatory disease (women)
  • Ophthalmia neonatorum
  • Septic arthritis
Uncomplicated gonorrhea:
  • Ceftriaxone
  • Tetracycline, e.g. doxycycline if also chlamydia is suspected
  • Spectinomycin for resistance or patient allergy to cephalosporin

Ophthalmia neonatorum:

  • Erythromycin + ceftriaxone
(No vaccine)
  • Safe sex
  • Erythromycin into eyes of newborn at risk
N. meningitidis
  • Droplet transmission
  • Meningococcal disease including meningitis
  • Sepsis, including Waterhouse-Friderichsen syndrome
  • Penicillin G
  • Ceftriaxone
  • NmVac4-A/C/Y/W-135 vaccine
  • Rifampin
Pseudomonas aeruginosa Opportunistic; Infects damaged tissues or people with immunodeficiency. Pseudomonas infection:
  • Pneumonia
  • Urinary tract infection
  • Corneal infection
  • Endocarditis
  • Osteomyelitis
  • Burn wound infection
  • Sepsis
  • Malignant external otitis
  • Anti-pseudomonal penicillins such as ticarcillin
  • Aminoglycoside
(no vaccine)
  • Topical silver sulfadiazine for burn wounds
Nocardia asteroides In soil Nocardiosis: Pneumonia, endocarditis, keratitis, neurological or lymphocutaneous infection TMP/SMX
Rickettsia rickettsii
  • Wood or dog tick
  • Rocky mountain spotted fever
  • Doxycycline
  • Chloramphenicol
(no preventive drug or approved vaccine)
  • Vector control, such as clothing
  • Prompt removal of attached ticks
Salmonella S typhi
  • Fecal–oral route, through food or water
  • Typhoid fever type salmonellosis (fever, abdominal pain, hepatosplenomegaly, rose spots)
  • Chronic carrier state
  • Ceftriaxone
  • Fluoroquinolones, e.g. ciprofloxacin
  • Ty21a and ViCPS vaccines
  • Hygiene and food preparation
Other Salmonella species


e.g. S. typhimurium

  • Fecal–oral
  • Food contaminated by fowl (e.g. uncooked eggs) or turtles
  • Salmonellosis with gastroenteritis
  • Paratyphoid fever
  • Osteomyelitis in people with sickle cells
  • Sepsis
  • Fluid and electrolyte replacement for diarrhea
  • Antibiotics (in neonates and immuno-compromised):
  • Ciprofloxacin
  • Ceftriaxone
  • TMP/SMX
  • Azithromycin
(No vaccine or preventive drug)
  • Proper sewage disposal
  • Food preparation
  • Good personal hygiene
Shigella S. sonnei


S. dysenteriae

  • Fecal–oral
  • Shigellosis (bacillary dysentery)
  • Fluid and electrolyte replacement
  • Fluoroquinolone such as ciprofloxacin if severe
  • Protection of water and food supplies
  • Vaccines are in trial stage
Staphylococcus aureus
  • Human flora on mucosae in e.g. anterior nares, skin and vagina, entering through wound
Coagulase-positive staphylococcal infections:
  • Skin infections, including impetigo
  • Acute infective endocarditis
  • Septis
  • Necrotizing pneumonia
  • Meningitis
  • Osteomyelitis
  • Toxinoses
    • Scalded skin syndrome
    • Toxic shock syndrome
    • Staphylococcal food poisoning
  • Incision and drainage of localized lesions
  • Nafcillin,oxacillin,methicillin
  • Vancomycin for Methicillin-resistant (MRSA)
(no vaccine or preventive drug)
  • Barrier precautions, washing hands and fomite disinfection in hospitals
epidermidis Human flora in skin, anterior nares and mucous membranes
  • Infections of implanted prostheses (e.g. heart valves and joints) and catheters
  • Vancomycin
None
saprophyticus Part of normal vaginal flora
  • Cystitis in women
  • TMP/SMX or norfloxacin
None
Streptococcus agalactiae Human flora in vagina,urethral mucous membranes,rectum
  • Vertically during childbirth
  • Sexually
  • Neonatal meningitis
  • Neonatal sepsis
  • Neonatal pneumonia
  • Endometritis in postpartum women
  • Opportunistic infections with sepsis and pneumonia
  • Penicillin G
  • Aminoglycoside in case of lethal infection
None
pneumoniae
  • Respiratory droplets
  • Human flora in nasopharynx (spreading in immunocompromised)
  • Acute bacterial pneumonia & meningitis in adults
  • Otitis media and sinusitis in children
  • Sepsis
  • Penicillin G
  • 23-serotype vaccine for adults (PPV)
  • Heptavalent conjugated vaccine for children (PCV)
pyogenes
  • Respiratory droplets
  • Direct physical contact with impetigo lesions
  • Streptococcal pharyngitis
  • Sepsis
  • Scarlet fever
  • Rheumatic fever
  • Impetigo and erysipelas
  • Puerperal fever
  • Necrotizing fasciitis
  • Poststreptococcal glomerulonephritis
  • Penicillin G or V
  • Macrolide, e.g. clarithromycin or erythromycin in penicillin allergy
  • Drainage and debridement for necrotizing fasciitis
No vaccine
  • Rapid antibiotic treatment helps prevent rheumatic fever
viridans Oral flora, penetration through abrasions
  • Subacute bacterial endocarditis
  • Dental cavities
  • Abscesses of brain and liver
Penicillin G
Treponema pallidum subspecies pallidum
  • Sexual
  • Vertical (from mother to fetus)
  • Syphilis: First a chancre, (a painless skin ulceration), then diffuse rash. Later: gummas (soft growths), neurological, or heart symptoms.
  • Congenital syphilis
  • Penicillin G
  • Doxycycline if penicillin allergy
  • Penicillin offered to recent sexual partners
  • Antibiotics to pregnant women if risk of transmitting to child
  • No vaccine available
  • Safe sex
Vibrio cholerae
  • Fecal–oral route
  • Contaminated water and raw seafood
  • Cholera: Severe "rice water" diarrhea
  • Fluid and electrolyte replacement
  • Doxycycline
  • Proper sanitation
  • Adequate food preparation
Yersinia pestis
  • Fleas from animals
  • Ingestion of animal tissues
  • Respiratory droplets
Plague:
  • Bubonic plague
  • Pneumonic plague
  • Streptomycin primarily
  • Tetracyclin
  • Supportive therapy for shock
  • Plague vaccine
  • Minimize exposure to rodents and fleas

අමතර අවධානයට

  • Human microbiome project
  • List of antibiotics
  • Pathogenic viruses
  1. Relapsing fever can also be caused by the following Borrelia species: B. crocidurae, B. duttonii, B. hermsii, B. hispanica, B. miyamotoi, B. persica, B. turicatae and B. venezuelensis.
    - Barbour, Alan G. (2017). "Relapsing Fever". In Kasper, Dennis L.; Fauci, Anthony S. (eds.). Harrison's Infectious Diseases (3rd ed.). New York: McGraw Hill Education. pp. 678–687. ISBN 978-1-259-83597-1.
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වර්ගීකරණය
D
  • MeSH: D001424
  • Bacterial Pathogen Pronunciation by Neal R. Chamberlain, Ph.D. at A.T. Still University
  • Pathogenic bacteria genomes and related information at PATRIC, a Bioinformatics Resource Center funded by NIAID
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