Term
Helicobacter pylori, causes what? |
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Definition
causes stomach and duodenal ulcers |
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Term
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Definition
Poultry is the most common source of infection
zoonotic disease
Reservoirs are? Many animals such as: pigs, cows, poultry, dogs, cats, rabbits, minks
How do humans become infected?by consuming contaminated food, un-pasteurized milk, or water
Prevention? Spread of the bacteria can be reduced by proper food handling and preparation
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Term
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Definition
Results from ingestion of shellfish (mussels) in contaminated estuaries
Eating sushi = uncooked seafood.
Leading cause of diarrhea in Japan
Why is disease prevalent in Japan? Eating Sushi
How can you avoid disease? Cook your food thoroughly
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Term
Vibrio cholera
Vibrio cholera:= rice water diarrhea
MOst common species to infect humans!!! |
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Definition
Causes? Cholera
How spread? Fecal-oral route
When does it occur? after monsooms, tsumannis, hurricanes & During disruption of war
Death is by? Dehydration, pt’s can lose 1 liter of fluid/hour
Diagnosis is by? “Rice water stool”àRapid, explosive, severe, Projectile diarrhea, vomiting
Treatment?
1. Fluid and electrolyte replacement
2. Antimicrobial drugs are not as important because they are lost in the watery stool
Prevention? Adequate sewage and water treatment can limit the spread of Vibrio cholerae |
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Term
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Definition
curved rods, curved bacillis, Pathogenic Gram-Negative
Found in estuarine and marine environments worldwide |
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Term
Leptospira interrogans:
Leptospira found worldwide in urine of Wild and domestic animals: Rats, Raccoons,Foxes, Dogs, Horses, Cattle, Pigs |
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Definition
How did it get it name? From wild and domestic animals
Zoonotic diseased
Who is at risk? humans
How spread? Humans contract the zoonotic disease leptospirosis either directly or indirectly
-Direct contact with the urine of infected animals through cuts and abrasions in the skin and mucous membranes
-Indirect contact through contaminated streams, lakes, moist soil
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Term
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Definition
Caused by: Relapsing Fever due to bacteria changing surface antigens
Periods of fever separated by symptom free intervals.
Diagnosisobservation of the spirochetes
Treatment is with antimicrobial drugs
Prevention involves avoidance of ticks and lice, good personal hygiene, and use of repellent chemicalS |
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Term
Borrelia burgdorferiàlyme Disease |
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Definition
Where first discovered? Reported in 1975 when children in Lyme, Connecticut developed rheumatoid arthritis
Why increase in human population? Bacteria are transmitted to humans via a tick bite
hat are vectors? Hard ticks of the genus Ixodes are the vectors of Lyme disease
Is the result of humans coming in closer association with ticks infected with Borrelia burgdorferi
Suburbs moving out into the country
Reservoirs? rodents and white tail deer |
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Term
Borrelia burgdorferi-> Lyme disease
3 Phases of disease in untreated pt's?
treatment?
Prevention? |
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Definition
1)An expanding red “bull’s eye” rash occurs at the site of infection along with flu-like symptoms
2)Neurological symptoms and cardiac dysfunction
3)Severe arthritis that can last for years
Treatment? penicillin and doxycycline first stage of Lyme disease
Treatment of later stages is difficult
Prevention? Take precaution to avoid ticks, “tick checks!” |
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Term
Spirochetes= coiled hairs in Greek
Three genera of Spirochetes causes human diease.
what are the 3? |
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Definition
1) Treponema
2) Borrelia
3) Leptospira |
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Term
Nonveneral Treponemal Diseases |
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Definition
Treponemacause three nonvenereal diseases
Occurs primarily in impoverished children
Live in unsanitary conditions
Middle East, Africa, Asia, South America
How spread? contact with the bacteria in the fluid draining from the lesions
BONE DEFORMATION
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Term
3 diseases Nonveneral Treponemal Diseases cause? |
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Definition
-1) Treponema pallidum endemicum = agent for bejel
Disease seen in children in Africa, Asia, Australia
Results in the formation of lesions around the lips, inside the mouth, and nose
The bacteria are spread by contaminated eating utensils; sharing drinking and eating utensils
-2) Treponema carateum = pinta
Limited to rural Latin America
Causes a skin disease that can result in scarring and disfigurement (red lesions that turn blue in sun)
Spread by skin-to-skin contact
-3) Treponema pallidum pertenue = yaws
Limited to tropical South America, SE Asia, central Africa
Characterized initially by skin lesions that can develop into large draining lesions in skin, bones, and lymph nodes |
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Term
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Definition
Can be spread from an infected mother to her fetus
results is:
1)death of fetus
2) mental retardation
3) Malformation especially of the face |
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Term
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Definition
1)Primary syphilis
2) Secondary syphilis
3) Latent syphilis
4) Tertiary syphilis |
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Term
Primary syphilis stage and characteristics? |
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Definition
Painless chancre at site of infection
Heals and patients thinks they no longer have an infection
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Term
Secondary syphilis stage and characterisics? |
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Definition
Invades bloodstream causes widespread rash
Skin lesions can be bumpy and pustular
Forms warts around vulva and scrotum
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Term
Latent syphilis stage and characteristics? |
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Definition
Rash disappears, thinks no longer has infection |
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Term
Tertiary syphilis stage and characteristics? |
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Definition
affects any organ and causes; dementia, blindness, paralysis, heart failure, syphilitic lesions called GUMMAS that occur in bones, nervous tissue, skin |
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Term
Treponema pallidum aka Syphilis treatment? |
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Definition
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Term
What are three genera that are spirochetes (coiled hairs in Greek)? |
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Definition
Three genera of Spirochetes cause human disease:
Treponema -- SYPHILIS
Borrelia--LYME disease
Leptospira |
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Term
Chlamydia psittaci common name of disease? |
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Definition
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Term
Chlamydia psittaci
what carries the bacteria?
how do humans get it? |
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Definition
What carries the bacteria? Birds harbor organism
How do humans get it? Inhalation of EBs, Contact of contaminated feces, Beak to mouth contact infected pet birds |
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Term
Chlamydia pneumonia= atypical pneumonia
Symptoms, who it infects, germ theory. |
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Definition
Symptoms? Most infections are mild, Malaise, Chronic cough
- Do not require hospitalization
- Spreads via respiratory droplets= ubiquitous
Who infects? ½ population of college students in US, have antibodies against Chlamydia pneumonia.
Germ theory of Heart Disease? à germs cause disease
- Has been implicated in atherosclerosis
- Hardening of the arteries, lipid deposits on walls of arteries |
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Term
Chlamydia trachomatisà Venereal Disease |
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Definition
STD: most common bacterial STD
Reservoir? Human body of asymptomatic carrier
Infects what? Eyes, genitals, lymph nodes, lungs
In children? Chlamydia trachomatis trachoma strain A-K
In adults? Chlamydia trachomatis LGV strain L1, L2, L3 = lymphogranuloma venereum or venereal disease |
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Term
Lymphogranuloma venereum? |
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Definition
QOT=Chlamydia trachomatis LGV strain L1, L2, L3 = lymphogranuloma venereum or venereal disease
1) Genital lesions
2) Swollen, painfully inflamed, inguinal lymph nodes, buboes
3) More often symptomatic in MALES bc of long-term reproductive damage |
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Term
Three stages of Lymphogranuloma venereum? |
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Definition
1. Initial stage = Produces a lesion at the infection site
2. Second stage = bacteria moves to lymph node
3. Third stage = genital sores |
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Term
NGUà Nongonococcal urethritis in malesà causes: |
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Definition
a. Painful urination
b. Thick, mucoid discharge
c. Can lead to epididymitis with swollen, tender scrotum
Caused by: Chlamydia trachomatis |
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Term
Chlamydia trachomatis in females causes: |
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Definition
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Term
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Definition
àintracellular energy parasite, no cell wall!
- Vectors? Anthropods do not serve as vectors or host in Chlamydias
- How spread? Spread by person to person contact
- EBs =Elementary bodies: infective form, dormat, survive outside cell
- RBs= Reticulate bodies: non-infective, multiply (reproduce) within the host cell
- Can you treat with penicillin? No b/c Chlamydias lack peptidoglycan, therefore cannot be treated with PCN |
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Term
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Definition
HMEàHuman Monocytic Ehrlichiosisà causesà HGE
HGE àHuman Granulocytic Ehrlichiosis
Vector? TICKS
Infects what animals? Dogs and Horses in US
Infects what cells in humans and causes what? Multiplies within the WBC, Ehrlichia released from ruptured WBC into the bloodàCAUSES abnormal low WBC
Who is at risk? 5-10% fatality of elderly and immunocompromised |
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Term
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Definition
transmited by red mitesà sole reservoir and vector
Disease cause: Fever, HA, muscle pain, less than half dev. Rash
ü tx: tetracycline
Vector? Red mites, only have one feeding and die
Reservoir? Red mites(chiggers)
Endemic where? Asia, Australia, and South Pacific Island
§ Infected soldiers during WWW11, Vietnam
§ Can infect todays travelers
Chiggers are REDBUGS larval formàthey are not REDBUGS!!!
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Term
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Definition
Transovarian passageàMale Ticks Infect Females During Mating (Tick STD)
o Female ticks transmit Rickettsia to eggs forming in her ovaries
o Rickettsia passed from one generation to another through tick eggs |
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Term
3 species of Rickettsia cause human infections. what are the 3? |
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Definition
Rickettsia rickettsii= tick-borne typhus (RMSF)
Rickettsia typhi = endemic or murine tyhpus; fleaS
Rickettsia prowazekii = epidemic or louse-borne typhus |
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Term
Rickettsia rickettsii = tick-borne typhus (RMSF) |
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Definition
Rash develops on trunk and appendages
Rash on palms and soles
Rash NOT on hands and feet in Chicken pox/Measles virus
Tick is the vector |
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Term
Rickettsia typhi = endemic or murine tyhpus; fleas |
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Definition
Vector is fleas
Rodents are reservoir
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Term
Rickettsia prowazekii = epidemic or louse-borne typhus |
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Definition
Exits constantly in population as a latent
Occurs duringà war, poverty, famine, displacement of people.
Human lice are the vectors |
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Term
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Definition
Epidemic typhus can recur decades after initial episode |
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Term
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Definition
- All Rickettsia die quickly outside host so Rickettsia require vectors to be transmitted from host to host.
- Each vector acts as a host and reservoirs
- ALL rickettsia trasmitted by arthropod vectos= tick. flea, louse
- 3 species |
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Term
Rickettsias characteristics? |
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Definition
ID'd by Dr. Howard Ricketts
obligate intracellular energy parasite, small, almost wall less
Cause à rash, fever, bad headaches
CNS |
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Term
Ureaplasma urealyticum & Mycoplasma genitaliumà causes |
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Definition
Urethritis
Burning urination
Yellow mucoid discharge from urethra |
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Term
Mycoplasma hominisà causes |
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Definition
Pyelonephritis- inflammation of the kidneys
Postpartum fever or postabortal fever
Pelvic Inflammatory disease= PID |
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Term
Mycoplasmas associated with Genital and UTi
3 of them |
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Definition
Mycoplasma hominis
Mycoplasma genitalium
Ureaplasma urealyticum
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Term
Mycoplasma pneumonia: CAUSED BY |
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Definition
à Streptococcus pneumonia (this has a vaccine) |
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Term
Mycoplasma pneumonia characteristics |
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Definition
What cells does it attach to and kill? Attaches specifically to ciliated epithelial cells lining the human respiratory tracts and kills them What does that cause? Increase mucus that irritates the upper respiratory tract
Symptoms? Fever, HA, sore throat, dry unproductive cough
What diseases does it cause, know all names.
Primary Atypical Pneumonia= PAP à “walking pneumonia”
Is there a vaccine? NO vaccine against Mycoplasma pneumonia
Usually self-limiting but can treat with antibiotics
When do you get disease? Occurs throughout the year: in spring and summer too(not typical of other types of pneumonia) More common in fall and winter |
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