We're unable to sign you in at this time. Please try again in a few minutes.
We were able to sign you in, but your subscription(s) could not be found. Please try again in a few minutes.
There may be a problem with your account. Please contact the AMA Service Center to resolve this issue.
Contact the AMA Service Center:
Telephone: 1 (800) 262-2350 or 1 (312) 670-7827  *   Email: subscriptions@jamanetwork.com
Error Message ......
Article |

Skin Reactions to Phytohemagglutinin in the Healthy Elderly Subject and in the Immunodeficient Subject

Ivo Krč, MD; Iva Matoušková, ScD; Dagmar Pa[unk]chová
Arch Intern Med. 1983;143(5):1074. doi:10.1001/archinte.1983.00350050244054.
Text Size: A A A
Published online


To the Editor.  —Phytohemagglutinin (PHA) is an agent mostly used for in vitro testing of lymphocyte transformation. Less attention has been paid to its possible use as a nonspecific skin antigen for the in vivo assessment of delayed-type hypersensitivity.1,2 Similarly to the common recall antigens, ie, PPD, streptokinase-streptodornase, candidin, and others, the intradermal inoculation of PHA causes perivascular cell infiltration consisting of both polynuclear and mononuclear cells, with some lymphocytes developing to blastlike cells.1In the February Archives (1982; 142:291-293), Burke et al, in an article entitled "Immune Responses to Varicella-Zoster in the Aged," comment on the skin reactions to intradermal injections of PHA in healthy volunteers and in immunologically compromised patients. As far as the healthy aged subjects are concerned, their results are fully in agreement with our investigation,3 carried out in a nursing home for the elderly. We have observed normal PHA skin responses even


Sign in

Purchase Options

• Buy this article
• Subscribe to the journal
• Rent this article ?

First Page Preview

View Large
First page PDF preview





Also Meets CME requirements for:
Browse CME for all U.S. States
Accreditation Information
The American Medical Association is accredited by the Accreditation Council for Continuing Medical Education to provide continuing medical education for physicians. The AMA designates this journal-based CME activity for a maximum of 1 AMA PRA Category 1 CreditTM per course. Physicians should claim only the credit commensurate with the extent of their participation in the activity. Physicians who complete the CME course and score at least 80% correct on the quiz are eligible for AMA PRA Category 1 CreditTM.
Note: You must get at least of the answers correct to pass this quiz.
Please click the checkbox indicating that you have read the full article in order to submit your answers.
Your answers have been saved for later.
You have not filled in all the answers to complete this quiz
The following questions were not answered:
Sorry, you have unsuccessfully completed this CME quiz with a score of
The following questions were not answered correctly:
Commitment to Change (optional):
Indicate what change(s) you will implement in your practice, if any, based on this CME course.
Your quiz results:
The filled radio buttons indicate your responses. The preferred responses are highlighted
For CME Course: A Proposed Model for Initial Assessment and Management of Acute Heart Failure Syndromes
Indicate what changes(s) you will implement in your practice, if any, based on this CME course.


Some tools below are only available to our subscribers or users with an online account.

0 Citations

Sign in

Purchase Options

• Buy this article
• Subscribe to the journal
• Rent this article ?

Related Content

Customize your page view by dragging & repositioning the boxes below.