âif you have HIV and one or more of these OIs, you will be diagnosed with AIDS, no matter what your CD4 count happens to be: 1  of bronchi, trachea, esophagus, or lungs. , 2  chronic intestinal (greater than 1 month's duration). 3  disease (particularly CMV retinitis). , 4  HIV-related.
Organisms that cause infectious disease include fungi, oomycetes, bacteria, viruses, viroids, virus-like organisms, phytoplasmas, protozoa, nematodes and parasitic plants.Not included are ectoparasites like insects, mites, vertebrate, or other pests that affect plant health by consumption of plant tissues.rganisms that cause infectious disease include fungi, oomycetes, bacteria, viruses, viroids, virus-like organisms, phytoplasmas, protozoa, nematodes and parasitic plants.
Infectious diseases are caused by small microbes invisible to the eye. The microbes include bacteria, protozoans, fungi, yeast and virus. Of them bacteria and protozoans are the most common disease causing agents. Bacteria cause disease both in plants and animals.he microbes include bacteria, protozoans, fungi, yeast and virus. Of them bacteria and protozoans are the most common disease causing agents. Bacteria cause disease both in plants and animals.