"Mycoplasma agalactiae" is a species of bacteria that belongs to the genus Mycoplasma. It is a small, wall-less organism that can cause contagious diseases in animals, particularly in ruminants such as goats and sheep. The infection caused by this bacterium is known as contagious agalactia, which is characterized by symptoms like mastitis (inflammation of the mammary gland), arthritis, keratoconjunctivitis (inflammation of the cornea and conjunctiva of the eye), and sometimes pneumonia. It's worth noting that "Mycoplasma agalactiae" is not known to infect humans.

Mycoplasma infections refer to illnesses caused by bacteria belonging to the genus Mycoplasma. These are among the smallest free-living organisms, lacking a cell wall and possessing a unique molecular structure. They can cause various respiratory tract infections (like pneumonia, bronchitis), urogenital infections, and other systemic diseases in humans, animals, and birds.

The most common Mycoplasma species that infect humans include M. pneumoniae, M. genitalium, M. hominis, and Ureaplasma urealyticum. Transmission usually occurs through respiratory droplets or sexual contact. Symptoms can vary widely depending on the site of infection but may include cough, chest pain, difficulty breathing, fatigue, joint pain, rash, and genital discharge or pelvic pain in women. Diagnosis often requires specific laboratory tests due to their unique growth requirements and resistance to many common antibiotics. Treatment typically involves macrolide or fluoroquinolone antibiotics.

Mycoplasma: A type of bacteria that lack a cell wall and are among the smallest organisms capable of self-replication. They can cause various infections in humans, animals, and plants. In humans, they are associated with respiratory tract infections (such as pneumonia), urogenital infections (like pelvic inflammatory disease), and some sexually transmitted diseases. Mycoplasma species are also known to contaminate cell cultures and can interfere with research experiments. Due to their small size and lack of a cell wall, they are resistant to many common antibiotics, making them difficult to treat.

"Mycoplasma bovis" is a species of bacteria that lack a cell wall and are characterized by their small size. They can cause various diseases in cattle, including pneumonia, mastitis (inflammation of the mammary gland), arthritis, and otitis (inflammation of the ear). The bacteria can be transmitted through direct contact between animals, contaminated milk, and aerosols. Infection with Mycoplasma bovis can result in decreased productivity and increased mortality in affected herds, making it a significant concern for the cattle industry. Diagnosis is often made through culture or PCR-based tests, and treatment typically involves the use of antibiotics, although resistance to certain antibiotics has been reported. Prevention strategies include biosecurity measures such as testing and culling infected animals, as well as good hygiene practices to limit the spread of the bacteria.

I'm happy to help, but I want to clarify that the term "sheep diseases" refers to a wide range of health issues that can affect sheep populations. It's not a single medical condition with a specific definition. Here are some examples of common diseases that can affect sheep:

1. Ovine Johne's Disease (OJD): A chronic, infectious disease caused by the bacterium Mycobacterium avium subspecies paratuberculosis. It affects the intestines and can cause weight loss, diarrhea, and death.
2. Footrot: A highly contagious bacterial infection that affects the feet of sheep, causing lameness, swelling, and pain. It's caused by the bacteria Dichelobacter nodosus.
3. Caseous Lymphadenitis (CL): A chronic infectious disease caused by the bacterium Corynebacterium pseudotuberculosis. It affects the lymph nodes and can cause abscesses, weight loss, and death.
4. Contagious Ecthyma (Orf): A highly contagious viral infection that affects the skin and mucous membranes of sheep, causing sores and lesions.
5. Mastitis: An inflammation of the mammary gland in sheep, usually caused by a bacterial infection. It can cause decreased milk production, fever, and loss of appetite.
6. Pneumonia: A respiratory infection that can affect sheep, causing coughing, difficulty breathing, and fever. It can be caused by various bacteria or viruses.
7. Enterotoxemia: A potentially fatal disease caused by the overproduction of toxins in the intestines of sheep, usually due to a bacterial infection with Clostridium perfringens.
8. Polioencephalomalacia (PEM): A neurological disorder that affects the brain of sheep, causing symptoms such as blindness, circling, and seizures. It's often caused by a thiamine deficiency or excessive sulfur intake.
9. Toxoplasmosis: A parasitic infection that can affect sheep, causing abortion, stillbirth, and neurological symptoms.
10. Blue tongue: A viral disease that affects sheep, causing fever, respiratory distress, and mouth ulcers. It's transmitted by insect vectors and is often associated with climate change.

Streptococcus agalactiae, also known as Group B Streptococcus (GBS), is a type of bacteria that commonly colonizes the gastrointestinal and genitourinary tracts of humans. It is Gram-positive, facultatively anaerobic, and forms chains when viewed under the microscope.

While S. agalactiae can be carried asymptomatically by many adults, it can cause serious infections in newborns, pregnant women, elderly individuals, and people with weakened immune systems. In newborns, GBS can lead to sepsis, pneumonia, and meningitis, which can result in long-term health complications or even be fatal if left untreated.

Pregnant women are often screened for GBS colonization during the third trimester of pregnancy, and those who test positive may receive intrapartum antibiotics to reduce the risk of transmission to their newborns during delivery.

I believe there may be a misunderstanding in your question. "Goat diseases" refers to illnesses that affect goats specifically. It does not mean diseases that are caused by goats or related to them in some way. Here are some examples of goat diseases:

1. Caprine Arthritis Encephalitis (CAE): A viral disease that affects goats, causing arthritis, pneumonia, and sometimes encephalitis.
2. Caseous Lymphadenitis (CL): A bacterial disease that causes abscesses in the lymph nodes of goats.
3. Contagious Caprine Pleuropneumonia (CCPP): A contagious respiratory disease caused by mycoplasma bacteria.
4. Johne's Disease: A chronic wasting disease caused by a type of bacterium called Mycobacterium avium subspecies paratuberculosis.
5. Pasteurellosis: A bacterial disease that can cause pneumonia, septicemia, and other infections in goats.
6. Salmonellosis: A bacterial disease caused by Salmonella bacteria, which can cause diarrhea, fever, and septicemia in goats.
7. Soremouth (Orf): A viral disease that causes sores and scabs around the mouth and nose of goats.

These are just a few examples of diseases that can affect goats. If you have any specific questions about goat health or diseases, I would recommend consulting with a veterinarian who specializes in small ruminants.

I'm sorry for any confusion, but "goats" is not a term commonly used in medical definitions. It is a common noun referring to the domesticated animal species Capra aegagrus hircus. If you have any questions about a specific medical condition or term, please provide that and I would be happy to help.

I apologize, but "sheep" is not a term that has a medical definition. It is a common animal with the scientific name Ovis aries. If you have any medical or health-related questions, I would be happy to try and help answer those for you.

Mycoplasma hominis is a species of bacteria that lack a cell wall and are among the smallest free-living organisms. They are commonly found as part of the normal flora in the genitourinary tract of humans, particularly in the urethra, cervix, and vagina. However, they can also cause various infections, especially in individuals with compromised immune systems or in the presence of other risk factors.

M. hominis has been associated with several types of infections, including:

1. Genital tract infections: M. hominis can cause pelvic inflammatory disease (PID), cervicitis, urethritis, and endometritis in women. In men, it may lead to urethritis and prostatitis.
2. Postpartum and post-abortion fever: M. hominis can contribute to febrile morbidity following delivery or abortion.
3. Respiratory tract infections: While rare, M. hominis has been implicated in some cases of respiratory tract infections, particularly in immunocompromised individuals.
4. Joint and soft tissue infections: M. hominis can cause septic arthritis, osteomyelitis, and other soft tissue infections, especially in patients with underlying joint diseases or compromised immune systems.
5. Central nervous system (CNS) infections: Although uncommon, M. hominis has been associated with CNS infections such as meningitis and brain abscesses, primarily in immunocompromised individuals.
6. Bloodstream infections: Bacteremia due to M. hominis is rare but can occur in immunocompromised patients or those with indwelling catheters.

Diagnosis of M. hominis infections typically involves the detection of the organism through various laboratory methods, such as culture, polymerase chain reaction (PCR), or serological tests. Treatment usually consists of antibiotics that target mycoplasmas, such as macrolides (e.g., azithromycin) or tetracyclines (e.g., doxycycline). However, resistance to certain antibiotics has been reported in some M. hominis strains.

"Mycoplasma mycoides" is a species of bacteria that lack a cell wall and are characterized by their small size. They are part of the class Mollicutes and are known to cause various diseases in animals, particularly ruminants such as cattle, goats, and sheep. The most well-known disease caused by M. mycoides is contagious bovine pleuropneumonia (CBPP), a severe and highly contagious respiratory disease in cattle that can lead to pneumonia, pleurisy, and death.

M. mycoides has been the subject of scientific research due to its small genome size and minimal genetic requirements for growth and survival. In fact, it was the first species of Mycoplasma to have its genome fully sequenced, and it has been used as a model organism in synthetic biology studies.

It's important to note that M. mycoides is not known to cause disease in humans. However, other species of Mycoplasma can cause respiratory and urogenital infections in humans.

Mycoplasma genitalium is a small, bacteria that lack a cell wall and can be found in the urinary and genital tracts of humans. It's known to cause several urogenital infections, such as urethritis in men and cervicitis in women. In some cases, it may also lead to pelvic inflammatory disease (PID) and complications like infertility or ectopic pregnancy in women. Mycoplasma genitalium can be sexually transmitted and is often associated with HIV transmission. Due to its small size and atypical growth requirements, it can be challenging to culture and diagnose using standard microbiological methods. Molecular tests, such as nucleic acid amplification tests (NAATs), are commonly used for detection in clinical settings.

"Mycoplasma fermentans" is a type of bacteria that lacks a cell wall and is commonly found as a commensal organism in the human respiratory and urogenital tracts. However, it can also cause opportunistic infections, particularly in individuals with weakened immune systems. It is known to be associated with chronic respiratory infections, inflammatory diseases, and has been suggested as a possible co-factor in the pathogenesis of certain conditions such as rheumatoid arthritis and chronic fatigue syndrome.

The medical definition of "Mycoplasma fermentans" is:
A species of small, gram-negative, pleomorphic bacteria belonging to the genus Mycoplasma, which lacks a cell wall and is capable of causing opportunistic infections in humans. It is commonly found as a commensal organism in the respiratory and urogenital tracts, but has been associated with chronic respiratory infections, inflammatory diseases, and other conditions. Its identification typically requires specialized laboratory tests, such as polymerase chain reaction (PCR) or culture-based methods.