Zoonotic3- Swine Fish Birds
Card Set Information
Zoonotic3- Swine Fish Birds
Describe hepatitis E virus.
+ssRNA virus, Hepeviridae, 4 genotypes, swine are primary reservoir
What species do the 4 genotypes of hepatitis E virus infect?
1,2- only humans
3,4- swine, humans
What is the incubation period for hepatitis E virus?
2 weeks- 2 months
Hepatitis E virus causes a(n) __________ disease that can be... (2)
acute icteric; asymptomatic (virus cleared rapidly) or symptomatic (anorexia, hepatomegaly, myalgia, jaundice, +/- GI signs)
The severity of hepatitis E virus infection is __________-dependent.
Describe transmission of hepatitis E virus.
feco-oral through contaminated food or water
Describe hepatitis E virus infection in swine.
subclinical infection, infected when maternal antibodies are waning at 8-10 weeks old
Describe strep suis microbes.
gram + cocci, type 2 in US [many serotypes]
Strep suis is considered a(n) ___________; it is present in many herds without __________.
emerging zoonotic disease; disease
Strep suis infection is most common in hogs ___________; it usually gains entry from... (4)
6-10 weeks old; tail docking, naval, ear notching, abrasions.
_________ swine carry strep suis in their... (4)
Healthy; tonsils, nasal cavities, genital and alimentary tracts.
Why can strep suis be isolate from piglet tonsils a few hours after birth?
piglets become infected by passing through the vaginal canal at birth
Strep suis is the leading cause of __________ in pigs; ___________ is the most common manifestation of strep suis.
Describe the disease caused by strep suis in people. (5)
meningitis, cellulitis, endocarditis, arthritis, septicemia
Erysipelas is an infectious multisystemic disease of ___________ that is characterized by... (6)
diamond skin lesions
, sudden death, fever, arthritis, endocarditis, abortion
Erysipelas etiologic agent is __________, which is...
Erysipelothrix rhusiopathiae; gram + rod
What kind of disease is Erysipelothrix rhusiopathiae cause in humans?
Erysipeloid- beta-hemolytic streptococcus cutaneous disease
Symptoms of Yersinia enterocolitica in humans. (5)
fever, abdominal pain, diarrhea (+/- bloody), [rarely] skin rash, joint pain
What people are at highest risk for Yersinia enterocolitica infection?
Describe disease caused by Yersinia enterocolitica in swine.
[commensal bacteria of swine] usually asymptomatic but may cause outbreaks of diarrhea in young feeder pigs
What are risk factors for humans contracting Yersinia enterocolitica? (3)
preparation of raw pork intestines, unpasteurized milk, animal contact
4 most important zoonoses from swine.
hepatitis E virus, Streptococcus suis, Erysipelas, Yersinia enterocolitica
2 most important zoonoses from birds.
Mycobacterium spp, Chlamydophila psittaci
Describe Chlamydophila psittaci microbe. (2)
obligate intracellular bacterium, lives on surfaces for weeks
The majority of Chlamydophila psittaci human infections is associated with...
exposure to caged birds.
How is Chlamydophila psittaci transmitted to humans? (4)
inhalation, mouth-to-beak, direct contact, person-to-person (venereal...not proven)
What is the incubation period of Chlamydophila psittaci in humans?
What are symptoms of Chlamydophila psittaci in humans? (11)
asymptomatic, pneumonia, fever, chills, headache, malaise, sore throat, cough, dyspnea, splenomegaly, rash
Describe avian chlamydiosis. (4)
maybe healthy carriers, shedding activated by stress, young birds shed more, latent infection common
Clinical signs of chlamydiosis in pet birds. (6)
anorexia, weight loss, diarrhea, sinusitis, respiratory distress, nervous signs
What are the most important fish-borne zoonotic agents?
How is Mycobacterium transmitted from fish to people?
breaks in the skin during contact with contaminated water or infected fish
How is Mycobacterium infection controlled in pet fish populations?
culling affected fish population and disinfecting tanks and equipment
What is "B virus"? What animal can we contract it from?
Macacine herpsvirus; monkeys- macaques
What disease does B virus cause in humans?
acute ascending encephalomyelitis, resulting in death or severe neurologic impairment
Describe B virus in macaques.
asymptomatic, mild symptoms
How is B virus generally spread to humans from monkeys? (4)
bites/scratches, exposure to tissues or secretions, mucosal contact with body fluids/tissues, needle stick injury