Laboratory parameters of the 1st order – obligatory laboratory tests.
- Small blood count
- Inflammatory parameters – CRP (C-reactive protein) or ESR (erythrocyte sedimentation rate).
- Calprotectin (fecal inflammation parameter; activity parameter; stool sample) – for initial diagnosis and progression of inflammatory bowel disease (IBD), the stool parameter is superior to inflammatory markers in the blood; delineation of non-inflammatory causes of gastrointestinal symptoms; normal fecal markers largely exclude active IBD (inflammatory bowel disease).
- In the case of infectious proctitis – smear to confirm the diagnosis (detection of bacterial DNA).
- Detection of STDs by serological diagnosis, culture or PCR (in the case of sexual history with anoreceptive anal intercourse; anoreceptive or passive is the one / the one in which the penis is inserted).
- If positive for an STD (eg. Syphilis, gonorrhea, HIV, granuloma inguinale (GI; donovanosis), ulcus molle, genital herpes, lymphogranuloma venereum (LGV; synonyms: Chlamydia trachomatis (serotype L1-L3), non-LGV chlamydial infections, human papillomavirus (HPV)), further screening for sexually transmitted diseases (“STDs”), incl. HIV test should be offered.
