Infectious & Inflammatory Diseases Flashcards
What are the most common clinical presentation of infection
Fever
Pain
Leukocytosis
FUO
Fever of unknown origin
What is important about a FUO
History and lab tests are important
Assessing for organomegaly
An infectious process can lead to abscess
An abscess is
A localized collection of pus
A complication to infection
Patients at risk for abscesses are
Diabetics Immunosuppressed Cancer Pts with hematomas Post-operative patients
Patients with abscesses will often present with what
Localized tenderness
What is the sonographic appearance of an abscess
Fluid filled area Posterior enhancement Thick, irregular walls Debris Possible gas
Hepatitis is what
An inflammation of the liver
What may hepatitis be caused by
Viruses
Toxins
What are the signs and symptoms of hepatitis
Fever Chill Nausea Vomiting Possible jaundice
How many types of viral hepatitis is there
6
What are the four main types of hepatitis
Hep A
Hep B
Hep C
Hep D
What is the primary mode of spread of Hep A
Fecal-oral route
What is the primary mode of spread for Hep B
Blood and body fluids
Carrier state
What is a carrier state for Hep B
When a person tests positive for the disease but has no symptoms
What is the primary mode of spread for Hep C
Transfusions
What is the primary mode of spread for Hep D
Dependant on Hep B as they have to be infected with it first
What is the most common Hepatitis in IV drug users
Hep D
What are the 3 different types clinical presentation of hepatitis
Acute
Chronic
Subfulminant/fulminant
What is the clinical presentation for acute hepatitis
Clinical recovery within 4 months
99% of all cases of Hep A are what
Acute
subfulminant/fulminat hepatitis is due to what
Hepatitis B or drug toxicity
Subfulminant/fulminant hepatitis is what kind of hepatitis
Serious and rare form
Subfulminant/fulminant hepatitis causes
Hepatic necrosis
Death occurs if >40% of what is lost
Hepatic parenchyma
What is the clinical presentation for chronic hepatis
When the biochemical markers remain abnormal for >6months
What is the sonographic appearance for acute hepatitis
Hepatomegaly Decreased liver echogencity Prominent portal vein walls GB wall thickening Liver appears normal Starry sky appearance
What is the most common appearance of acute hepatitis
Liver appears normal
What is the sonographic appearance of chronic hepatitis
Coarse liver parenchyma
Overall increase in echogencity
Portal hypertension
Cirrhosis
What are the important lab values for determining hepatitis
ALT
AST
Bilirubin
What are the 4 routes of spread by pyogenic bacteria to the liver
Biliary tract
Portal venous system
Hepatic artery
Trauma
Define pyogenic
Pus producing
What is the clinical presentation for bacterial liver infections
Fever
RUQ pain
Malaise
Anorexia
Define malaise
General feeling of unwellness
What is the sonographic appearance of bacterial liver infections
Simple to complex cyst “Shaggy” wall Internal septations Echogenic foci with posterior reverberations Fluid-fluid levels
What are the 2 types of fungal diseases
Candida
Pneumocystis Carinii
What is candidiasis
Yeast infection
Who is typically affected by candidiasis
Immunocompromised patients
What is the clinical presentation of candidiasis
Persistent fever with WBC returning to normal
What is the sonographic appearance of candida
Uniformly hypoechoic Hyperechoic Bulls eye appearance Wheel within a wheel appearance Liver/kidney/spleen involvement
What is the most common sonographic appearance of candida
Uniformly hypoechoic
What is the bulls eye appearance
Focal areas with a hypoechoic rim and a hyperechoic center
What is the wheel within a wheel appearance
A hypoechoic rim with a hyperechoic center and hypoechoic nidus
Define nidus
Dot
Pneumocystis carinii used to be thought as a what and is not classified as a what
Parasitic infection and is now a fungal infection
Pneumocystis Carinii is what kind of infection
Opportunist
Pneumocystis Carinii affected what kind of patient
Immunocompromised
-most commonly AIDS
Pneumocystis Carinii can involve what
Liver Spleen Renal cortex Pancreas Lymph nodes
What is the most common organ involved when a patient has pneumocystis Carinii
Liver
What is the sonographic apperance of pneumocystis Carinii
Tiny non-shadowing echogenic foci
Progresses to shadowing clumps of calcifications
What are the 3 types of parasitic disease that involves sonography
Amebiasis
Schistisomiasis
Hydration disease
What is the route of spread for amebiasis to the liver
Fecal-oral
How does amebiasis travel to the liver
From the colon, through the portal vein to the liver
What lobe of the liver is most commonly affected in cases of amebiasis
Right
What is the sonographic appearance of amebiasis
Round/oval shape- abscess
Hypoechoic
Fine internal echoes
What is the most common clinical presentation of amebiasis
Pain
+/- diarrhea
What is another name for hydatid disease
Echinococcal
What kind of parasite is involved in hydatid disease
Tapeworm
What kind of countries is hydatid disease common in
Sheep and cattle raising countries
What organs can hydatid disease affect
Liver Spleen Ureter Bladder Kidneys
What is the organ most commonly affected by hydatid disease
Liver
In hydatid disease who is typically the definitive host
Dogs
In hydatid disease who is the intermediate host
Humans
What is a definitive host
The host where the parasite reaches maturity
What is a intermediate host
The host in which the parasite undergoes development but does not reach maturity
What is the typical route of spread of hydatid disease to humans
Fecal-oral
How does the parasite in hydatid disease travel to the liver
Through the portal venous system
The hydatid embryo is
Slow growing with 3 layers
What are the 3 layers of a hydatid embyro
Ectocyst
Pericyst
Endocyst
Define ectocyst
External membrane (~1mm thick)