What is human disease caused by monerans?

Bacterial Infections:

1. Tuberculosis (TB): Caused by *Mycobacterium tuberculosis*, it primarily affects the lungs and can lead to severe respiratory symptoms, including coughing, fever, and weight loss.

2. Pneumonia: Caused by various bacteria, including *Streptococcus pneumoniae*, *Haemophilus influenzae*, and *Mycoplasma pneumoniae*, it causes inflammation of the lungs, leading to coughing, chest pain, fever, and shortness of breath.

3. Diphtheria: Caused by *Corynebacterium diphtheriae*, it affects the throat and upper respiratory tract, causing a thick, gray membrane to form, leading to breathing difficulties and potential heart complications.

4. Meningitis: Caused by bacteria like *Neisseria meningitidis*, *Streptococcus pneumoniae*, and *Haemophilus influenzae*, it involves inflammation of the meninges, the protective membranes surrounding the brain and spinal cord. Symptoms include severe headache, fever, stiff neck, and light sensitivity.

5. Typhoid Fever: Caused by *Salmonella enterica serovar Typhi*, it causes high fever, abdominal pain, diarrhea, and headache. It can lead to severe complications, including intestinal bleeding and perforation.

6. Tetanus (Lockjaw): Caused by *Clostridium tetani*, it affects the nervous system, causing severe muscle spasms and rigidity, especially in the jaw and neck. It can be life-threatening if untreated.

7. Leprosy: Caused by *Mycobacterium leprae*, it is a chronic infectious disease affecting the skin, mucous membranes, and nerves, leading to disfiguring skin lesions and nerve damage.

Rickettsial Infections:

1. Typhus: Caused by bacteria of the genus *Rickettsia*, it is transmitted by lice or fleas and can lead to high fever, headache, rash, and severe illness.

2. Rocky Mountain Spotted Fever: Transmitted by ticks, it causes fever, headache, muscle pain, and a characteristic rash on the palms and soles.

Chlamydial Infections:

1. Chlamydia: Caused by *Chlamydia trachomatis*, it is a sexually transmitted infection that can cause inflammation of the cervix, urethra, rectum, or conjunctiva.

2. Trachoma: Caused by *Chlamydia trachomatis*, it is an infectious eye disease leading to scarring and, potentially, blindness.

Mycoplasmal Infections:

1. Mycoplasma pneumoniae: Causes atypical pneumonia, usually milder compared to bacterial pneumonia, with symptoms like cough, fever, and fatigue.

2. Ureaplasma: A sexually transmitted infection that can lead to a variety of symptoms, including infertility and pelvic inflammatory disease (PID) in women.

It's worth noting that while monerans, including bacteria and cyanobacteria, can cause diseases, many other monerans play vital ecological roles in nutrient cycling, decomposition, nitrogen fixation, and other essential ecosystem processes.