Thick blood smears are more sensitive in detecting malaria parasites because the blood is more concentrated allowing for a greater volume of blood to be examined; however, thick smears are more difficult to read. Thin smears aid in parasite species identification and quantification.Regarding this, what is the difference between thick and thin blood smear?
A thick blood smear is a drop of blood on a glass slide. (Often there are few parasites in the blood at the time the test is done.) A thin blood smear is a drop of blood that is spread across a large area of the slide. Thin blood smears helps doctors discover what species of malaria is causing the infection.
Similarly, what is the purpose of making thin and thick film? Doctors use thick and thin blood smears to determine whether you have malaria. Thick and thin blood smears will let doctors know the percentage of red blood cells that are infected (parasite density) and what type of parasites are present. A thick blood smear is a drop of blood on a glass slide.
In this regard, why is a thin smear better than a thick smear?
Thick smears The blood elements (including parasites, if any) are more concentrated (app. 30×) than in an equal area of a thin smear. Thus, thick smears allow a more efficient detection of parasites (increased sensitivity). However, they do not permit an optimal review of parasite morphology.
What are the characteristics of a good blood smear?
The perfect blood smear has a feathered edge that is nearly square, has a rainbow sheen when reflecting the light and is exactly one cell thick in the feathered edge when viewed microscopically. Proper preparation of the blood smear is critical for obtaining accurate results on the differential.
Is it better to have thick or thin blood?
For the heart and circulatory system, though, thinner, more watery blood might be better. Some tantalizing threads of evidence suggest that people with thicker (or more viscous) blood have higher chances of developing heart disease or having a heart attack or stroke.Why are blood smears stained?
These stains allow for the detection of white blood cell, red blood cell, and platelet abnormalities. Hematopathologists often use other specialized stains to aid in the differential diagnosis of blood disorders.What is Giemsa stain used for?
It differentially stains human and bacterial cells purple and pink respectively. It can be used for histopathological diagnosis of malaria and some other spirochete and protozoan blood parasites. Giemsa stain is a classic blood film stain for peripheral blood smears and bone marrow specimens.Why is it necessary to prepare a thin film smear?
Thin blood films have a low sensitivity for detection of malaria parasites. Therefore they are used in conjunction with thick blood films, in order to identify the malaria species that was detected by microscopic examination of the thick blood film. All blood samples are potentially infectious.What are the reasons for heat fixation?
Heat fixing denatures bacterial enzymes, preventing them from digesting cell parts, which causes the cell to break, a process called autolysis. The heat also enhances the adherence of bacterial cells to the slide.What causes thick blood in the body?
Thick blood is caused by heavy proteins, or by too much blood in the circulation. Too many red cells, white cells, and platelets will result in blood thickening. Another cause is an imbalance in the blood clotting system. Not all blood clots are caused by thick blood.What is peripheral smear test?
A blood smear reveals information about the number and shape of blood cells in the body. Peripheral blood smear test is ordered as part of a general health exam to help diagnose many illnesses. It helps diagnose if red blood cells, white blood cells and platelets are normal in appearance and number.What happens if smear is too thick?
PROBLEM: If the smear is too thick, the cells can appear Gram-positive in very thick area. PROBLEM: Over warming the smear (this happens most often when smears are warmed prior to being completely air dried, or when flaming too much to fix the slides) will cause all cells to appear Gram-negative.Why do you avoid the thick area of the smear?
Body and base of the smear These areas are usually too thick to evaluate cells under higher power. The thick area of a smear dries too slowly for leukocytes to spread out.Can you have malaria and still test negative?
If your results were negative, but you still have malaria symptoms, you may need retesting. The number of malaria parasites can vary at times. So your provider may order blood smears every 12-24 hours over a period of two to three days. When treated early, most cases of malaria can be cured.Why is smear fixed on a slide?
The purpose of making a smear is to fix the bacteria onto the slide and to prevent the sample from being lost during a staining procedure. A smear can be prepared from a solid or broth medium. Below are some guidelines for preparing a smear for a Gram-stain. of liquid bacterial growth in the center of a clean slide.How do you stain a blood smear?
The dried smear is then fixed with methanol or ethyl alcohol and stained. The smear is covered with stain for approximately ten minutes, then diluted with water and allowed an additional ten minutes for the cells to properly stain. Following the stain application, the slide is rinsed under running water.What is the principle of romanowsky stain?
Romanowsky stains are neutral stains composed of a mixture of oxidized methylene blue (azure) dyes and Eosin Y. The azures are basic dyes that bind acid nuclei and result in a blue to purple color. The acid dye, eosin, is attracted to the alkaline cytoplasm, producing red coloration.How do you identify malaria parasites on blood smears?
Malaria parasites can be identified by examining under the microscope a drop of the patient's blood, spread out as a “blood smear” on a microscope slide. Prior to examination, the specimen is stained (most often with the Giemsa stain) to give the parasites a distinctive appearance.What are the mechanism for thin and thick smear method of malaria diagnosis?
The blood may be prepared in two ways, the so-called thick blood smear,and the thin blood smear. For a thick blood smear, a drop (approximately 6–10 mL) is spread on a clean, dry microscope slide. After drying, the thick blood smear is stained with a Giemsa stain.How do you stain a blood smear for malaria?
Place slides into the working Giemsa stain (2.5%) for 45-60 minutes. 4. Remove thin smear slides and rinse by dipping 3-4 times in the Giemsa buffer. Thick smears should be left in buffer for 5 minutes.What are thin films used for?
Thin films are layers of material deposited on a bulk substrate in order to impart properties that cannot be easily attained (or not attained at all) by the base material. Thin film deposition refers to the action of applying a thin film of any substance on a surface, whether a substrate or already deposited layers. 
