Williams Erythrocyte infectious Agents and ETC.

Question 1

Hemotrophic mycoplasmas

Answer 1

bacteria without a wall that attach and grow on the surface of RBCs and transmitted in cats by fleas and dogs by brown dog tick
Opportunistic and cause immune mediated injury

Question 2

What type of hemotrophic mycoplasma in cats usually produces anemia and CS of diseases?

Answer 2

Mycoplasma hemofelis

Question 3

Hemotrophic mycoplasmas are present in what kind of pattern?

Answer 3

Cyclic pattern assoc. w splenic contraction

Question 4

How many of the cats with Mycoplasmosis have FeLV?

Answer 4

40-50% *significant**

Question 5

Hemotrophic mycoplasmas in dogs are haemocanis and haematoparvum and occur in what kind of specific situation?

Answer 5

Dogs without a spleen and immunocompromised

Question 6

Anaplasma marginale in cattle is endemic to what areas? What happens with these animals?

Answer 6

Southwest US and Cali,

Dz is mild in calves 6-9 months old, and recovered= PI for life

Question 7

Babesiosis-

What is it? What is it usually involved with? Transmission?

Answer 7

intraerythrocyte protozoan parasites

Usually involved with hemolytic anemia, fever, splenomegaly; transmission is ticks

Question 8

Which babesia is tear shaped? Which is ring shaped and tiny?

Answer 8

Babesia canis; Babesia Gibsoni

Question 9

What two breeds of dogs are most susceptible to Babesia?

Answer 9

Grayhounds and Pit bulls

Question 10

Babesia is most common in what species?

Answer 10

Dogs

Question 11

Cytauxzoonosis is caused by hemoprotozoan parasite ___ ______ and is transmitted by ___

Answer 11

Cytauxzoonosis felis; ticks

reservoir host is the bobcat

Question 12

What are the two forms that exist of Cytauxzoonosis felis?

Answer 12

Nonerythrocytic (schizont) – in the macrophage

Erythrocytic (piroplasm/merozoite) in the RBC

Question 13

How can we diagnose Cytauxzoonosis?

Answer 13

Identify the schizonts within the macrophages and/or identify the merozoites in the RBC
PCR too

Question 14

Know pic of Distemper inclusions… and everything else!!!~~~

Answer 14

!!!!

Question 15

What is the term for increased number of circling nucleated red blood cells?

Answer 15

Rubricytosis;

Question 16

Why might we see rubricytosis under normal circumstances?

Answer 16

response to anemia with concurrent reticulocytes- this would be appropriate response

Question 17

Why might we see rubricytosis under abnormal conditions?

Answer 17

Marrow damage (heat stroke, necrosis, cancer, endotoxemia, hypoxia), splenic contraction/splenectomy, lead toxicosis, extramedullary hematopoiesis

Question 18

What is the formula for corrected WBC???

Answer 18

Correct WBC= measured WBC x 100/ 100 + number of nucleated RBCs

Question 19

Many analyzers cannot discriminate between nucleated RBCs and WBCs…..so what does that mean?

Answer 19

rubricytosis (immature erythrocytes) may falsely increase the WBCs

More than 10 nRBCs per 100 WBCs needs to be corrected