hirudinaceus recorded the lowest prevalence (0.62%).
Machado-Filho (1963) describe a Macracanthorhynchus major parasitando el intestino delgado del pecari de collar (Tayassu tajacu) proveniente de Brasil.
Eosinophilic enteritis due to Macracanthorhynchus hirudinaceus infection: report of 3 cases.
Morphological measurements and characteristics of the mounted everted specimen are identical to the everted cystacanths of Macracanthorhynchus ingens (Linstow 1879) Meyer 1933, described by Elkins & Nickol (1983) and consistent with the cystacanth description by Moore (1946).
Macracanthorhynchus ingens in reptile paratenic hosts has only been reported from southern Louisiana.
For yet another, Macracanthorhynchus
hirudinaceus, there is no effective treatment.
On 21 August 1993 a single adult specimen of the acanthocephalan Macracanthorhynchus ingens (Oligacanthorhychidae) was collected in Manhattan, Kansas.
Macracanthorhynchus ingens from a child in Texas (USA).