the ers in ders Flashcards
(199 cards)
Non-enveloped, icosahedral, single stranded, (+ve) sense RNA
Group 4 replication
Picornaviridae
transmission?
enzyme?
Hepatitis A
-a very stable virus(beats acid, detergent, saltwater) but can be killed by bleach
faecal oral
(transmitted easily bc there is sheding before sx. very high transmission in children)
-group 4s have RNA d RNA p
Complications are rare and include fulminant hepatitis
hepatitis A
99% recover
hepatits B 90% recovery
also hepatitis D (or acute liver failure)
hep A vaccine
when is first does
what type of vaccine
12 months
killed/ inactivated
recommended for children +1yr, travelers, gays. can give before or after exposure
Non-enveloped, icosahedral, single- stranded, (+ve) sense RNA
Hepeviridae
Hepatitis E
group 4 needs RNA p RNA d
➢ Higher mortality rate in pregnant
women
➢ No chronic infections and no____
HEV compared to HAV
-no lab tests, treatment, vaccine, Ig marker
Enveloped, icosahedral, single- stranded, (+ve) sense RNA
Family Flaviviridae
HCV
group 4 needs RNA d RNA p
human blood is resovior
spread by piercings, tattoos, unprotected sex. Mother to baby transmission
HCV
common in HIV pts
diagnosis for HCV
vaccine?
Detection of anti-HCV antibodies using ELISA
Recombinant immunoblot assay (RIBA) also used for detection of
anti-HCV antibodies
RT-PCR used to detect viral genome in blood and liver tissue
Chronic infection is characterized by elevated liver enzymes and
detection of anti-HCV Abs and HCV RNA for at least 6 months
No vaccine
Enveloped, circular, partially dsDNA
group?
stability?
family?
Hepatitis B Virus
group 7: RNA d DNA p
group
-stable at low ph and in freezing temps
hepadna family
hbv vaccine
when is first dose
what kind of vaccine
at birth take first dose
subunit vaccine or immune globulin
Single stranded, (-ve) sense RNA, rod- shaped due to extensive base pairing
structure composition?
HDV
defective virus and needs HBV
-HDV envelope contains HBsAg derived from HBV
HDV capsid protein comprises of small (S-HDAg) and large (L-HDAg) delta antigens (HDAgs)
liver fluke or sheep liver fluke
classification?
source?
hosts?
Fasciola hepatica/gigantica - trematode parasite that is found in the liver and biliary tract of a human
from water or food
and has an intermediate host the fresh water fish with definitive host sheep, cattle, goat(herbovoirs)
fasciola life cycel
and phases of infection
immature eggs shed
eggs >miracidia
miracidia invades snails
snails made and released in cercaia. encysts on aquatic vegetation as metacercaia
-mamals injest the metacercaia**
-metacercaia become adult flukes in the mammal
acute phase: takes 2 -4 months for migration of larvae to liver with generalized flu sx
latent phase is asymptomatic while the parasite matures
chronic phase: biliary colic, no fatty foods, obstructive jaundice, pruitis
Chinese (Oriental) Liver fluke
association?
hosts?
Clonorchis sinensis (Opisthorchis sinensis)
Foodborne zoonosis associated with consumption of raw, pickled, smoked fish
first intermediate host is fresh water snail and second host is fresh water fish
Clonorchis sinensis life cycle
MCMC
most common cause of hyperpituitaryism
benign adenoma arising in the antior lobe of pituitary
-most commonly a prolactinoma
what causes hyperprolactinemia
stress, antipsychotics, oral contrceptives, antidopamine
tumor, prolactinoma
-dopamine counters prolactin
how to diagnose acromegaly
measure Gh and IGF-1
-IGF-1 is more stable and more important for diagnosis
Oral Glucose Tolerance Test with GH measuremnt(should be no GH with glucose in the body to allow insulin to work, if there is GH detected then acromegaly)
diabetes inspidedus is almost always of _________ origin
hypothalamic origin
-posterior pituitary dysfunction
Postpartum necrosis of the anterior pituitary
sheehan syndrome- hypopituitarism
-during pregnancy the antior pituitary doubles in size but may not have an inc in blood supply…hypoxia
stimulation and supression test
for. hypopituitarism
-give insulin to make the body in a stressful hypoglycemia state. also gives TRH and GnRH…ant pituitary should stip out prolactin, cortosol, and GH
pattern of likelyhood for pititaryh hornome deficiencies
GH(children only) > LH/FSH > TSH > ACTH
most common cause of hyperthyroidism
graves disease - diffuse hyperplasia
AI dz with HLA association
second most common cause is toxic multinodular goiter
types of thyroiditis
causes hyperthyroidism
- DeQuervian-Subacute thyroiditis(thyroid painful, tenderness, fever)
- postpartum bc of natural immunosupression during pregnancy
- hashitoxicosis: hyperthryoid bc of hashimotio thyroiditis