Ключевые слова: 3d, bacilli, bacteria, biology, chancroid, clinical, coccobacillus, colony, culture, cytology, diagnosis, disease, ducreyi, genital, gramnegative, haemophilus, healthcare, histology, illustration, infection, inflammation, lymphadenopathy, medical, medicine, microbe, microbiology, microorganism, microscopy, morphology, pain, pathogen, rod, science, sexually, smear, std, sti, transmitted, ulcer, virulence,