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.
Fungi Fungi are the most prevalent plant pathogen of indoor ornamental plants. They cause a number of leaf spot, stem, and root rot diseases. Most foliage diseases caused by fungi develop circular, dead spots or lesions on leaves, stems and flowers.The gray-to-brown center is dry and papery, with a darker edge.lants are subject to two types of disorders: 1  Abiotic or non-infectious disorders; caused by environmental, cultural, and non-living things. 2  Biotic, infectious or pathogenic diseases; caused by living pathogenic microorganisms such as fungi, bacteria, viruses, or nematodes.