About Paul Charest Expertise Any questions that have to do with hematology. Explaining laboratory tests including :coagulation (PT/aPTT), CBC, differential, ESR, and flow cytometry (leukemia/lymphoma)also including the theory behind them. Hemoglobinopathies, leukemia, lymphoma, hemostasis, hematopoiesis, and cellular morphology are a few of the topics that I teach and practice.
I also have experience with immunohematology, otherwise known as blood banking. Feel free to ask about blood types, blood groups, the type and crossmatch, transfusions, antibody identification, DAT, elutions as well as absorptions
I have also worked in a parasitology lab, as well as taught the subject as well. So feel free to ask about helminths (cestodes, trematodes, and nematodes), protozoan parasites, sporozoan etc.
Lastly, I teach a course in clinical mycology where we grow and identify yeasts and moulds.
Experience I have worked in a hematology lab, flow-cytometry lab, blood bank, and microbiology lab. I am also an instructor at Northeastern University part-time
Expert: Paul Charest Date: 6/27/2008 Subject: rh factor
Question if the whole family is positive for rh factor, then can a baby be born negative for rh factor
Answer Yes it is possible. It is possible because there are two genes for "Rh factor." Patients that are Rh positive can genetically be either +,+ (homozygous), or +,- (heterozygous). Patients that are Rh negative have to be -,-. I'll make a chart below. In my chart, both parents are Rh positive, and they both have to be heterozygotes for this to work.
If you can figure out this horrible excuse for a chart. it breaks down like this:
25% chance for having a Rh negative offspring
75% chance of having Rh positive (1 homozygote, and 2 heterozygote)
