Herpes Zoster – Treatment and Symptoms

Definition of Herpes zoster Herpes zoster – an infection that results from reactivation of the varicella-zoster virus, which lies dormant in the spinal nerve roots after causing chickenpox. The virus can remain dormant for decades; doctors do not know what reactivates it though suspect a combination of aging and stress to the immune system. The infection travels the tract of […]

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HIV / AIDS – Definition

HIV / AIDS Definition An infection with the human immunodeficiency virus (HIV) that ultimately results in the illness acquired immunodeficiency syndrome (AIDS). Though new hiv/aids infections are on the decline in the United States and other industrialized nations, hiv/aids remains endemic on the African continent. Hiv/aids spreads through contact with body fluids such as occurs with sexual contact (vaginal intercourse, anal intercourse, […]

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Human Papillomavirus (HPV) – Virus, Infection, Symptoms and Cervical Cancer

Human Papillomavirus Definition Human Papillomavirus – a family of more than 100 strains of virus, various strains of which cause common warts, genital hpv infection, and cervical cancer. HPV and Common Warts The strains of HPV that cause common warts are mildly contagious and are more likely to spread to different locations on a person’s body rather […]

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Influenza Virus – Symptoms, Treatment and Flu Vaccine

Influenza Definition Influenza is a common and potentially serious viral infection, commonly called the flu, that causes upper respiratory symptoms. Influenza viruses rapidly adapt and mutate, which gives them the perpetual ability to cause illness. There are three types of human influenza virus-influenza A, influenza B, and influenza C. Influenza A viruses are primarily responsible for annual outbreaks […]

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Measles Virus – Symptoms, Course and Treatment

Measles Virus Definition An illness resulting from infection with the measles virus. Once among the most common childhood diseases worldwide, measles (also called rubeola) now primarily exists in developing nations where it remains a leading cause of childhood blindness and death. Routine measles immunization, the standard of care since becoming available in the early 1960s, has […]

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Mononucleosis, Infectious – Symptoms and Treatment

Infectious Mononucleosis Definition An illness that results from infection with the Epstein-barr virus. Infectious mononucleosis is most prevalent among adolescents and young adults though may occur at any age. The infection spreads through contact with saliva; among young people and within families, sharing drinks and food are common means of contracting the illness. The Epstein-Barr virus […]

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Mumps Virus – Symptoms and Treatment

Mumps Virus in Adults and Children – Definition Mumps – An illness resulting from the mumps virus, which primarily infects the salivary glands and may also involve the pancreas, testicles (men), ovarieS (women), and sometimes the kidneys. The mumps virus may also invade the central nervous system, causing neuritis and encephalitis. Since the advent of the mumps vaccine in the early […]

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Pathogen Definition, What is a Pathogen

Pathogen Definition Pathogen is a microbe capable of causing illness. The most common pathogens are bacteria, fungi, parasites, and viruses. The process through which a pathogen, also called an infectious agent, causes illness is pathogenesis. The body attempts to protect itself from pathogens through numerous mechanisms, key among them being antibodymediated immunity and cell-mediated immunity. Vaccines and treatments with antibiotic medications, antiviral medications, and antifungal medications are […]

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Pertussis – Symptoms and Treatment

Pertussis Definition An illness resulting from infection with the virus Bordetella pertussis. Pertussis is among the childhood diseases for which routine immunization is the standard of care in the United States. The hallmark of the illness is a rapid, violent cough that causes the person to make a “whooping” sound when trying to breathe through the coughing, […]

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Rabies Virus – Definition, Symptoms and Treatment

Rabies Virus Definition A potentially fatal illness resulting from infection with the rabies virus, which belongs to the Lyssavirus viral family. Rabies is very rare in people though a common infection in wild animals who can transmit the infection to unvaccinated pets such as dogs and cats or to people through bites. Raccoons, skunks, coyotes, […]

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