Meningococcal meningitis (MM) is a serious form of bacterial infection resulting in inflammation of meninges.
N. meningitidis mainly affects the central nervous system and often starts with respiratory illness. Major symptoms of MM include acute severe headache, fever, photophobia, drowsiness, stiff neck, nausea and…
Coccidioidomycosis is a fungal infection caused by Coccidioides.
Coccidioidomycosis may occur initially as a mild acute diseases referred to as “Valley fever” but can later progress into a more serious form of the disease that may be in chronic or disseminated form. The symptomatology of coccidioidomycosis and its…
Psittacosis is a contagious animal disease bearing the capability of transmission to humans and caused as a result of a Chlamydia psittaci infection. Humans can be infected from parrots, pigeons, ducks, hens, and many other bird species.
The incubation period for psittacosis is 1 to 4 weeks. The majority of…
Culturing of C. burnetii in the laboratory is not feasible because of the particularly contagious potential of the organism in laboratory cultures to laboratorytechnicians … cultures are typically negative (Note that, although possible, attempting to isolate the organism from blood is a dangerous practice; cases of Q fever have developed in laboratory … technicians) In chronic Q fever, the following laboratory results may be observed: Anemia of chronic disease Elevated ESR Elevated gamma globulins (polyclonal) Elevated rheumatoid
Leptospirosis is an infectious disease which occurs in humans, rodents and other wild and domesticated species.
There is a wide range of symptoms that can occur in humans who are affected by leptospirosis even though some people will be asymptomatic. Since the disease is considered a biphasic disease it presents…
Hepatitis B is a form of viral hepatitis, caused by the hepatitis B virus, a member of the Hepadnavirus family. It is estimated that worldwide, more than 350 million people have chronic hepatitis B virus infection. The course of the disease may be extremely variable, depending on the patient’s age and immune status.…
Viral hepatitis is an inflammatory liver condition that most commonly arises from hepatitis A virus (HAV), hepatitis B virus (HBV), hepatitis C virus (HCV), hepatitis D virus (HDV), and hepatitis E virus (HEV). The prevalence of these viruses varies geographically.
The clinical picture of acute viral hepatitis is variable…
Epidemic typhus is the most severe form of rickettsial infections. This louse-borne typhus is an acute febrile illness that features a headache, rash, myalgia, vasculitis, and is complicated by severe central nervous system (CNS) manifestations, gangrene, and high rates of death in untreated individuals. It is…