Epidemiology
Trench fever is a vector borne disease in which humans are primarily the main hosts. The vector through which the disease is typically transmitted is referred to as the human body louse "Pediculus humanus humanus", which is better known as lice. The British Expeditionary Force Pyrexia of Unknown Origin Enquiry Sub-Committee concluded that the specific means by which the vector infected the host was louse waste entering the body through abraded skin. Although the disease is typically found in humans, the gram negative bacterium which induce the disease have been seen in mammals such as dogs, cats, and macaques in small numbers.Being that the vector of the disease is human body louse, it can be determined that the main risk factors for infection are mostly in relation to contracting body louse. Specifically, some risk factors include: body louse infestation, overcrowded and unhygienic conditions, body hygiene, war, famine, malnutrition, alcoholism, homelessness, and intravenous drug abuse.The identified risk factors directly correlate with the subpopulations of identified infected persons throughout the duration of the known disease. Historically, trench fever was found in young male soldiers of World War I, whereas in the 21st century the disease mostly has a prevalence in middle aged homeless men. This can be seen when looking at a 21st-century outbreak of the disease in Denver, Colorado, where researcher David McCormick and his colleagues came across the gram negative bacterium in 15% of the 241 homeless persons who were tested.
The primary goal of ABA is to improve quality of life, and independence by teaching adaptive behaviors to children with autism, and to diminish problematic behaviors like running away from home, or self-injury by using positive or negative reinforcement to encourage or discourage behaviors over time. Environmental Therapy: Sensory Enrichment Therapy uses enrichment of the sensory experience to improve symptoms in autism, many of which are common to CDD. Medications: There are no medications available to directly treat CDD. Antipsychotic medications are used to treat severe behavior problems like aggressive stance and repetitive behavior patterns. Anticonvulsant medications are used to control seizures. References
Further reading
Maurice, Catherine (1993). Let me hear your voice: a familys triumph over autism. New York: Knopf. ISBN 978-0-679-40863-5. OCLC 26633221. Westphal A, Schelinski S, Volkmar F, Pelphrey K (February 2013). "Revisiting regression in autism: Hellers dementia infantilis. Includes a translation of Über Dementia Infantilis". J Autism Dev Disord. 43 (2): 265–71. doi:10.1007/s10803-012-1559-z. PMID 22677931. S2CID 3924122. Dobbs, David (2016). "The most terrifying childhood condition youve never heard of." Spectrum 6 July 2016, accessed 6 May 2017 at en:Childhood_disintegrative_disorder?action=edit,   oldid 778841596&wteswitched=1

External links
NIH/Medline