Step 1: Concept
Dengue is a viral infection that significantly affects the hematological profile of the patient.
Step 2: Meaning
Thrombocytes is the technical term for platelets, which are cell fragments involved in blood clotting.
Step 3: Analysis
One of the most critical clinical indicators of Dengue fever is thrombocytopenia, which is a marked reduction in the platelet count due to bone marrow suppression and increased destruction.
Step 4: Conclusion
Consequently, a decrease in thrombocytes (platelets) is the primary hematological change associated with Dengue.
Final Answer: (C)