###Human: My HIV test reports came nonreactive. Still, is there any chance for HIV infection? ###Assistant: Hi. Tridot test for HIV is reliable. There is something called window period in HIV. It usually ranges from two to three months where the test for HIV will be negative. In such cases, the test has to be repeated. Since you have done the test after three months, this test should be conclusive. VDRL (venereal disease research laboratory test) and HBsAg test (hepatitis B surface antigen test) are reliable. If they are negative, it means that you do not have an infection. Gonorrhea symptoms will start within two to five days of contact, and chlamydia comes within 10 to 14 days of contact. The chances of having gonorrhea and chlamydia after three months are minimal. For Herpes, you have to take both IgG and IgM antibodies test. IgG antibody indicates past infection, and IgM antibodies indicate present infection. If you have blisters, then IgM will be positive. If IgG alone is positive, it suggests about the past infection. I explain about pus cells also. Pus cells are polymorphonuclear leukocytes and neutrophils. There should be more than ten pus cells in the urine per high power field for the urine test to be positive. Having three to six pus cells are not of much significance. It should be more than 10 to be worried.